update gnulib to 47bf2cf3184027c1eb9c1dfeea5c5b8b2d69710d

* lib/dosname.h, lib/glthread/lock.c, lib/glthread/lock.h, lib/glthread/threadlib.c, lib/windows-mutex.c, lib/windows-mutex.h, lib/windows-once.c, lib/windows-once.h, lib/windows-recmutex.c, lib/windows-recmutex.h, lib/windows-rwlock.c, lib/windows-rwlock.h, m4/host-cpu-c-abi.m4, m4/lib-ld.m4, m4/lib-link.m4, m4/lib-prefix.m4, m4/lock.m4, m4/longlong.m4, m4/pthread_rwlock_rdlock.m4, tools/config.rpath: Delete. * lib/alloca.in.h, lib/argmatch.c, lib/argmatch.h, lib/arg-nonnull.h, lib/argp-ba.c, lib/argp-eexst.c, lib/argp-fmtstream.c, lib/argp-fmtstream.h, lib/argp-fs-xinl.c, lib/argp.h, lib/argp-help.c, lib/argp-namefrob.h, lib/argp-parse.c, lib/argp-pin.c, lib/argp-pv.c, lib/argp-pvh.c, lib/argp-xinl.c, lib/asnprintf.c, lib/basename-lgpl.c, lib/c-ctype.h, lib/c++defs.h, lib/cdefs.h, lib/closeout.c, lib/closeout.h, lib/close-stream.c, lib/c-strcasecmp.c, lib/c-strcaseeq.h, lib/c-strcase.h, lib/c-strncasecmp.c, lib/dirname.h, lib/dirname-lgpl.c, lib/errno.in.h, lib/error.c, lib/error.h, lib/exitfail.c, lib/exitfail.h, lib/fcntl.in.h, lib/filename.h, lib/float.c, lib/float+.h, lib/float.in.h, lib/fpending.c, lib/fpending.h, lib/getopt1.c, lib/getopt.c, lib/getopt-cdefs.in.h, lib/getopt-core.h, lib/getopt-ext.h, lib/getopt.in.h, lib/getopt_int.h, lib/getopt-pfx-core.h, lib/getopt-pfx-ext.h, lib/getprogname.c, lib/getprogname.h, lib/gettext.h, lib/gettimeofday.c, lib/hard-locale.c, lib/hard-locale.h, lib/intprops.h, lib/isatty.c, lib/itold.c, lib/libc-config.h, lib/limits.in.h, lib/localcharset.c, lib/localcharset.h, lib/localtime-buffer.c, lib/localtime-buffer.h, lib/lstat.c, lib/Makefile.am, lib/malloca.c, lib/malloca.h, lib/malloc.c, lib/mbrtowc.c, lib/mbsinit.c, lib/memchr.c, lib/memchr.valgrind, lib/mempcpy.c, lib/minmax.h, lib/mkdir.c, lib/mkstemp.c, lib/mkstemps.c, lib/msvc-inval.c, lib/msvc-inval.h, lib/msvc-nothrow.c, lib/msvc-nothrow.h, lib/_Noreturn.h, lib/pathmax.h, lib/printf-args.c, lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h, lib/progname.c, lib/progname.h, lib/quotearg.c, lib/quotearg.h, lib/quote.h, lib/rawmemchr.c, lib/rawmemchr.valgrind, lib/secure_getenv.c, lib/size_max.h, lib/sleep.c, lib/stat.c, lib/stat-time.h, lib/stat-w32.c, lib/stat-w32.h, lib/stdalign.in.h, lib/stdbool.in.h, lib/stddef.in.h, lib/stdint.in.h, lib/stdio-impl.h, lib/stdio.in.h, lib/stdlib.in.h, lib/stpcpy.c, lib/strcasecmp.c, lib/strchrnul.c, lib/strchrnul.valgrind, lib/streq.h, lib/strerror.c, lib/strerror-override.c, lib/strerror-override.h, lib/string.in.h, lib/strings.in.h, lib/stripslash.c, lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/strverscmp.c, lib/sysexits.in.h, lib/sys_stat.in.h, lib/sys_time.in.h, lib/sys_types.in.h, lib/sys_wait.in.h, lib/tempname.c, lib/tempname.h, lib/time.in.h, lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/verify.h, lib/vsnprintf.c, lib/warn-on-use.h, lib/wchar.in.h, lib/wctype.in.h, lib/windows-initguard.h, lib/xalloc-die.c, lib/xalloc.h, lib/xalloc-oversized.h, lib/xmalloc.c, lib/xsize.h, m4/00gnulib.m4, m4/absolute-header.m4, m4/alloca.m4, m4/argp.m4, m4/codeset.m4, m4/dirname.m4, m4/double-slash-root.m4, m4/eealloc.m4, m4/errno_h.m4, m4/error.m4, m4/exponentd.m4, m4/extensions.m4, m4/extern-inline.m4, m4/fcntl_h.m4, m4/fcntl-o.m4, m4/float_h.m4, m4/fpending.m4, m4/getopt.m4, m4/getprogname.m4, m4/gettimeofday.m4, m4/gnulib-cache.m4, m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/gnulib-tool.m4, m4/include_next.m4, m4/__inline.m4, m4/intmax_t.m4, m4/inttypes_h.m4, m4/isatty.m4, m4/largefile.m4, m4/limits-h.m4, m4/localcharset.m4, m4/locale-fr.m4, m4/locale-ja.m4, m4/locale-zh.m4, m4/localtime-buffer.m4, m4/lstat.m4, m4/malloca.m4, m4/malloc.m4, m4/math_h.m4, m4/mbrtowc.m4, m4/mbsinit.m4, m4/mbstate_t.m4, m4/memchr.m4, m4/mempcpy.m4, m4/minmax.m4, m4/mkdir.m4, m4/mkstemp.m4, m4/mkstemps.m4, m4/mmap-anon.m4, m4/msvc-inval.m4, m4/msvc-nothrow.m4, m4/multiarch.m4, m4/nocrash.m4, m4/off_t.m4, m4/pathmax.m4, m4/printf.m4, m4/quotearg.m4, m4/quote.m4, m4/rawmemchr.m4, m4/secure_getenv.m4, m4/size_max.m4, m4/sleep.m4, m4/ssize_t.m4, m4/stat.m4, m4/stat-time.m4, m4/stdalign.m4, m4/stdbool.m4, m4/stddef_h.m4, m4/std-gnu11.m4, m4/stdint_h.m4, m4/stdint.m4, m4/stdio_h.m4, m4/stdlib_h.m4, m4/stpcpy.m4, m4/strcase.m4, m4/strchrnul.m4, m4/strerror.m4, m4/string_h.m4, m4/strings_h.m4, m4/strndup.m4, m4/strnlen.m4, m4/strverscmp.m4, m4/sysexits.m4, m4/sys_socket_h.m4, m4/sys_stat_h.m4, m4/sys_time_h.m4, m4/sys_types_h.m4, m4/sys_wait_h.m4, m4/tempname.m4, m4/threadlib.m4, m4/time_h.m4, m4/unistd_h.m4, m4/vasnprintf.m4, m4/vsnprintf.m4, m4/warn-on-use.m4, m4/wchar_h.m4, m4/wchar_t.m4, m4/wctype_h.m4, m4/wint_t.m4, m4/xalloc.m4, m4/xsize.m4: Update. * lib/inttypes.in.h, lib/lc-charset-dispatch.c, lib/lc-charset-dispatch.h, lib/locale.in.h, lib/mbrtowc-impl.h, lib/mbrtowc-impl-utf8.h, lib/mbtowc-lock.c, lib/mbtowc-lock.h, lib/setlocale-lock.c, lib/setlocale_null.c, lib/setlocale_null.h, m4/inttypes.m4, m4/locale_h.m4, m4/setlocale_null.m4, m4/visibility.m4, m4/zzgnulib.m4: New files.
2020-04-16 10:47:14 +02:00 · 2020-04-16 10:47:14 +02:00 · 1e86463205
commit 1e86463205
parent fe642bc9ad
287 changed files with 6133 additions and 6812 deletions
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@ -1,6 +1,6 @@
 ## DO NOT EDIT! GENERATED AUTOMATICALLY!
 ## Process this file with automake to produce Makefile.in.
-# Copyright (C) 2002-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2020 Free Software Foundation, Inc.
 #
 # This file is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@ -46,7 +46,7 @@
 #  strverscmp \
 #  sys_wait

-AUTOMAKE_OPTIONS = 1.11 gnits subdir-objects
+AUTOMAKE_OPTIONS = 1.11 gnits

 SUBDIRS =
 noinst_HEADERS =
@ -73,8 +73,10 @@ libgnu_la_DEPENDENCIES = $(gl_LTLIBOBJS)
 EXTRA_libgnu_la_SOURCES =
 libgnu_la_LDFLAGS = $(AM_LDFLAGS)
 libgnu_la_LDFLAGS += -no-undefined
+libgnu_la_LDFLAGS += $(LIB_HARD_LOCALE)
+libgnu_la_LDFLAGS += $(LIB_MBRTOWC)
+libgnu_la_LDFLAGS += $(LIB_SETLOCALE_NULL)
 libgnu_la_LDFLAGS += $(LTLIBINTL)
-libgnu_la_LDFLAGS += $(LTLIBTHREAD)

 ## begin gnulib module absolute-header

@ -176,13 +178,6 @@ EXTRA_DIST += dirname.h

 ## end   gnulib module dirname-lgpl

-## begin gnulib module dosname
-
-
-EXTRA_DIST += dosname.h
-
-## end   gnulib module dosname
-
 ## begin gnulib module errno

 BUILT_SOURCES += $(ERRNO_H)
@ -248,12 +243,14 @@ fcntl.h: fcntl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H)
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
 	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_FCNTL_H''@|$(NEXT_FCNTL_H)|g' \
+	      -e 's/@''GNULIB_CREAT''@/$(GNULIB_CREAT)/g' \
 	      -e 's/@''GNULIB_FCNTL''@/$(GNULIB_FCNTL)/g' \
 	      -e 's/@''GNULIB_NONBLOCKING''@/$(GNULIB_NONBLOCKING)/g' \
 	      -e 's/@''GNULIB_OPEN''@/$(GNULIB_OPEN)/g' \
 	      -e 's/@''GNULIB_OPENAT''@/$(GNULIB_OPENAT)/g' \
 	      -e 's|@''HAVE_FCNTL''@|$(HAVE_FCNTL)|g' \
 	      -e 's|@''HAVE_OPENAT''@|$(HAVE_OPENAT)|g' \
+	      -e 's|@''REPLACE_CREAT''@|$(REPLACE_CREAT)|g' \
 	      -e 's|@''REPLACE_FCNTL''@|$(REPLACE_FCNTL)|g' \
 	      -e 's|@''REPLACE_OPEN''@|$(REPLACE_OPEN)|g' \
 	      -e 's|@''REPLACE_OPENAT''@|$(REPLACE_OPENAT)|g' \
@ -381,13 +378,6 @@ EXTRA_DIST += hard-locale.h

 ## end   gnulib module hard-locale

-## begin gnulib module havelib
-
-
-EXTRA_DIST += $(top_srcdir)/tools/config.rpath
-
-## end   gnulib module havelib
-
 ## begin gnulib module intprops


@ -395,6 +385,50 @@ EXTRA_DIST += intprops.h

 ## end   gnulib module intprops

+## begin gnulib module inttypes-incomplete
+
+BUILT_SOURCES += inttypes.h
+
+# We need the following in order to create <inttypes.h> when the system
+# doesn't have one that works with the given compiler.
+inttypes.h: inttypes.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H) $(ARG_NONNULL_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_INTTYPES_H''@|$(NEXT_INTTYPES_H)|g' \
+	      -e 's/@''PRI_MACROS_BROKEN''@/$(PRI_MACROS_BROKEN)/g' \
+	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
+	      -e 's/@''PRIPTR_PREFIX''@/$(PRIPTR_PREFIX)/g' \
+	      -e 's/@''GNULIB_IMAXABS''@/$(GNULIB_IMAXABS)/g' \
+	      -e 's/@''GNULIB_IMAXDIV''@/$(GNULIB_IMAXDIV)/g' \
+	      -e 's/@''GNULIB_STRTOIMAX''@/$(GNULIB_STRTOIMAX)/g' \
+	      -e 's/@''GNULIB_STRTOUMAX''@/$(GNULIB_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_DECL_IMAXABS''@/$(HAVE_DECL_IMAXABS)/g' \
+	      -e 's/@''HAVE_DECL_IMAXDIV''@/$(HAVE_DECL_IMAXDIV)/g' \
+	      -e 's/@''HAVE_DECL_STRTOIMAX''@/$(HAVE_DECL_STRTOIMAX)/g' \
+	      -e 's/@''HAVE_DECL_STRTOUMAX''@/$(HAVE_DECL_STRTOUMAX)/g' \
+	      -e 's/@''HAVE_IMAXDIV_T''@/$(HAVE_IMAXDIV_T)/g' \
+	      -e 's/@''REPLACE_STRTOIMAX''@/$(REPLACE_STRTOIMAX)/g' \
+	      -e 's/@''REPLACE_STRTOUMAX''@/$(REPLACE_STRTOUMAX)/g' \
+	      -e 's/@''INT32_MAX_LT_INTMAX_MAX''@/$(INT32_MAX_LT_INTMAX_MAX)/g' \
+	      -e 's/@''INT64_MAX_EQ_LONG_MAX''@/$(INT64_MAX_EQ_LONG_MAX)/g' \
+	      -e 's/@''UINT32_MAX_LT_UINTMAX_MAX''@/$(UINT32_MAX_LT_UINTMAX_MAX)/g' \
+	      -e 's/@''UINT64_MAX_EQ_ULONG_MAX''@/$(UINT64_MAX_EQ_ULONG_MAX)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/inttypes.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += inttypes.h inttypes.h-t
+
+EXTRA_DIST += inttypes.in.h
+
+## end   gnulib module inttypes-incomplete
+
 ## begin gnulib module isatty


@ -447,6 +481,47 @@ EXTRA_DIST += localcharset.h

 ## end   gnulib module localcharset

+## begin gnulib module locale
+
+BUILT_SOURCES += locale.h
+
+# We need the following in order to create <locale.h> when the system
+# doesn't have one that provides all definitions.
+locale.h: locale.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LOCALE_H''@|$(NEXT_LOCALE_H)|g' \
+	      -e 's/@''GNULIB_LOCALECONV''@/$(GNULIB_LOCALECONV)/g' \
+	      -e 's/@''GNULIB_SETLOCALE''@/$(GNULIB_SETLOCALE)/g' \
+	      -e 's/@''GNULIB_SETLOCALE_NULL''@/$(GNULIB_SETLOCALE_NULL)/g' \
+	      -e 's/@''GNULIB_DUPLOCALE''@/$(GNULIB_DUPLOCALE)/g' \
+	      -e 's/@''GNULIB_LOCALENAME''@/$(GNULIB_LOCALENAME)/g' \
+	      -e 's|@''HAVE_NEWLOCALE''@|$(HAVE_NEWLOCALE)|g' \
+	      -e 's|@''HAVE_DUPLOCALE''@|$(HAVE_DUPLOCALE)|g' \
+	      -e 's|@''HAVE_FREELOCALE''@|$(HAVE_FREELOCALE)|g' \
+	      -e 's|@''HAVE_XLOCALE_H''@|$(HAVE_XLOCALE_H)|g' \
+	      -e 's|@''REPLACE_LOCALECONV''@|$(REPLACE_LOCALECONV)|g' \
+	      -e 's|@''REPLACE_SETLOCALE''@|$(REPLACE_SETLOCALE)|g' \
+	      -e 's|@''REPLACE_NEWLOCALE''@|$(REPLACE_NEWLOCALE)|g' \
+	      -e 's|@''REPLACE_DUPLOCALE''@|$(REPLACE_DUPLOCALE)|g' \
+	      -e 's|@''REPLACE_FREELOCALE''@|$(REPLACE_FREELOCALE)|g' \
+	      -e 's|@''REPLACE_STRUCT_LCONV''@|$(REPLACE_STRUCT_LCONV)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/locale.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += locale.h locale.h-t
+
+EXTRA_DIST += locale.in.h
+
+## end   gnulib module locale
+
 ## begin gnulib module localtime-buffer


@ -456,12 +531,6 @@ EXTRA_libgnu_la_SOURCES += localtime-buffer.c

 ## end   gnulib module localtime-buffer

-## begin gnulib module lock
-
-libgnu_la_SOURCES += glthread/lock.h glthread/lock.c
-
-## end   gnulib module lock
-
 ## begin gnulib module lstat


@ -500,9 +569,9 @@ EXTRA_DIST += malloca.h
 ## begin gnulib module mbrtowc


-EXTRA_DIST += mbrtowc.c
+EXTRA_DIST += lc-charset-dispatch.c lc-charset-dispatch.h mbrtowc-impl-utf8.h mbrtowc-impl.h mbrtowc.c mbtowc-lock.c mbtowc-lock.h windows-initguard.h

-EXTRA_libgnu_la_SOURCES += mbrtowc.c
+EXTRA_libgnu_la_SOURCES += lc-charset-dispatch.c mbrtowc.c mbtowc-lock.c

 ## end   gnulib module mbrtowc

@ -630,6 +699,16 @@ EXTRA_libgnu_la_SOURCES += secure_getenv.c

 ## end   gnulib module secure_getenv

+## begin gnulib module setlocale-null
+
+libgnu_la_SOURCES += setlocale_null.c
+
+EXTRA_DIST += setlocale-lock.c setlocale_null.h windows-initguard.h
+
+EXTRA_libgnu_la_SOURCES += setlocale-lock.c
+
+## end   gnulib module setlocale-null
+
 ## begin gnulib module size_max

 libgnu_la_SOURCES += size_max.h
@ -809,8 +888,6 @@ stdint.h: stdint.in.h $(top_builddir)/config.status
 	      -e 's/@''HAVE_SYS_INTTYPES_H''@/$(HAVE_SYS_INTTYPES_H)/g' \
 	      -e 's/@''HAVE_SYS_BITYPES_H''@/$(HAVE_SYS_BITYPES_H)/g' \
 	      -e 's/@''HAVE_WCHAR_H''@/$(HAVE_WCHAR_H)/g' \
-	      -e 's/@''HAVE_LONG_LONG_INT''@/$(HAVE_LONG_LONG_INT)/g' \
-	      -e 's/@''HAVE_UNSIGNED_LONG_LONG_INT''@/$(HAVE_UNSIGNED_LONG_LONG_INT)/g' \
 	      -e 's/@''APPLE_UNIVERSAL_BUILD''@/$(APPLE_UNIVERSAL_BUILD)/g' \
 	      -e 's/@''BITSIZEOF_PTRDIFF_T''@/$(BITSIZEOF_PTRDIFF_T)/g' \
 	      -e 's/@''PTRDIFF_T_SUFFIX''@/$(PTRDIFF_T_SUFFIX)/g' \
@ -1340,6 +1417,7 @@ sys/stat.h: sys_stat.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNU
 	      -e 's|@''HAVE_MKNOD''@|$(HAVE_MKNOD)|g' \
 	      -e 's|@''HAVE_MKNODAT''@|$(HAVE_MKNODAT)|g' \
 	      -e 's|@''HAVE_UTIMENSAT''@|$(HAVE_UTIMENSAT)|g' \
+	      -e 's|@''REPLACE_FCHMODAT''@|$(REPLACE_FCHMODAT)|g' \
 	      -e 's|@''REPLACE_FSTAT''@|$(REPLACE_FSTAT)|g' \
 	      -e 's|@''REPLACE_FSTATAT''@|$(REPLACE_FSTATAT)|g' \
 	      -e 's|@''REPLACE_FUTIMENS''@|$(REPLACE_FUTIMENS)|g' \
@ -1487,14 +1565,6 @@ EXTRA_DIST += tempname.h

 ## end   gnulib module tempname

-## begin gnulib module threadlib
-
-libgnu_la_SOURCES += glthread/threadlib.c
-
-EXTRA_DIST += $(top_srcdir)/tools/config.rpath
-
-## end   gnulib module threadlib
-
 ## begin gnulib module time

 BUILT_SOURCES += time.h
@ -1567,6 +1637,7 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
 	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_UNISTD_H''@|$(NEXT_UNISTD_H)|g' \
 	      -e 's|@''WINDOWS_64_BIT_OFF_T''@|$(WINDOWS_64_BIT_OFF_T)|g' \
+	      -e 's/@''GNULIB_ACCESS''@/$(GNULIB_ACCESS)/g' \
 	      -e 's/@''GNULIB_CHDIR''@/$(GNULIB_CHDIR)/g' \
 	      -e 's/@''GNULIB_CHOWN''@/$(GNULIB_CHOWN)/g' \
 	      -e 's/@''GNULIB_CLOSE''@/$(GNULIB_CLOSE)/g' \
@ -1589,6 +1660,7 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
 	      -e 's/@''GNULIB_GETHOSTNAME''@/$(GNULIB_GETHOSTNAME)/g' \
 	      -e 's/@''GNULIB_GETLOGIN''@/$(GNULIB_GETLOGIN)/g' \
 	      -e 's/@''GNULIB_GETLOGIN_R''@/$(GNULIB_GETLOGIN_R)/g' \
+	      -e 's/@''GNULIB_GETOPT_POSIX''@/$(GNULIB_GETOPT_POSIX)/g' \
 	      -e 's/@''GNULIB_GETPAGESIZE''@/$(GNULIB_GETPAGESIZE)/g' \
 	      -e 's/@''GNULIB_GETPASS''@/$(GNULIB_GETPASS)/g' \
 	      -e 's/@''GNULIB_GETUSERSHELL''@/$(GNULIB_GETUSERSHELL)/g' \
@ -1666,7 +1738,8 @@ unistd.h: unistd.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H
 	      -e 's|@''HAVE_OS_H''@|$(HAVE_OS_H)|g' \
 	      -e 's|@''HAVE_SYS_PARAM_H''@|$(HAVE_SYS_PARAM_H)|g' \
 	  | \
-	  sed -e 's|@''REPLACE_CHOWN''@|$(REPLACE_CHOWN)|g' \
+	  sed -e 's|@''REPLACE_ACCESS''@|$(REPLACE_ACCESS)|g' \
+	      -e 's|@''REPLACE_CHOWN''@|$(REPLACE_CHOWN)|g' \
 	      -e 's|@''REPLACE_CLOSE''@|$(REPLACE_CLOSE)|g' \
 	      -e 's|@''REPLACE_DUP''@|$(REPLACE_DUP)|g' \
 	      -e 's|@''REPLACE_DUP2''@|$(REPLACE_DUP2)|g' \
@ -1853,6 +1926,7 @@ wchar.h: wchar.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H)
 	      -e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
 	      -e 's|@''REPLACE_WCSWIDTH''@|$(REPLACE_WCSWIDTH)|g' \
 	      -e 's|@''REPLACE_WCSFTIME''@|$(REPLACE_WCSFTIME)|g' \
+	      -e 's|@''REPLACE_WCSTOK''@|$(REPLACE_WCSTOK)|g' \
 	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
 	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
 	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
@ -1883,6 +1957,8 @@ wctype.h: wctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H
 	      -e 's/@''HAVE_CRTDEFS_H''@/$(HAVE_CRTDEFS_H)/g' \
 	      -e 's/@''GNULIB_OVERRIDES_WINT_T''@/$(GNULIB_OVERRIDES_WINT_T)/g' \
 	      -e 's/@''GNULIB_ISWBLANK''@/$(GNULIB_ISWBLANK)/g' \
+	      -e 's/@''GNULIB_ISWDIGIT''@/$(GNULIB_ISWDIGIT)/g' \
+	      -e 's/@''GNULIB_ISWXDIGIT''@/$(GNULIB_ISWXDIGIT)/g' \
 	      -e 's/@''GNULIB_WCTYPE''@/$(GNULIB_WCTYPE)/g' \
 	      -e 's/@''GNULIB_ISWCTYPE''@/$(GNULIB_ISWCTYPE)/g' \
 	      -e 's/@''GNULIB_WCTRANS''@/$(GNULIB_WCTRANS)/g' \
@ -1893,6 +1969,8 @@ wctype.h: wctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H
 	      -e 's/@''HAVE_WCTRANS_T''@/$(HAVE_WCTRANS_T)/g' \
 	      -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \
 	      -e 's/@''REPLACE_ISWBLANK''@/$(REPLACE_ISWBLANK)/g' \
+	      -e 's/@''REPLACE_ISWDIGIT''@/$(REPLACE_ISWDIGIT)/g' \
+	      -e 's/@''REPLACE_ISWXDIGIT''@/$(REPLACE_ISWXDIGIT)/g' \
 	      -e 's/@''REPLACE_ISWCNTRL''@/$(REPLACE_ISWCNTRL)/g' \
 	      -e 's/@''REPLACE_TOWLOWER''@/$(REPLACE_TOWLOWER)/g' \
 	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
@ -1906,42 +1984,6 @@ EXTRA_DIST += wctype.in.h

 ## end   gnulib module wctype-h

-## begin gnulib module windows-mutex
-
-
-EXTRA_DIST += windows-initguard.h windows-mutex.c windows-mutex.h
-
-EXTRA_libgnu_la_SOURCES += windows-mutex.c
-
-## end   gnulib module windows-mutex
-
-## begin gnulib module windows-once
-
-
-EXTRA_DIST += windows-once.c windows-once.h
-
-EXTRA_libgnu_la_SOURCES += windows-once.c
-
-## end   gnulib module windows-once
-
-## begin gnulib module windows-recmutex
-
-
-EXTRA_DIST += windows-initguard.h windows-recmutex.c windows-recmutex.h
-
-EXTRA_libgnu_la_SOURCES += windows-recmutex.c
-
-## end   gnulib module windows-recmutex
-
-## begin gnulib module windows-rwlock
-
-
-EXTRA_DIST += windows-initguard.h windows-rwlock.c windows-rwlock.h
-
-EXTRA_libgnu_la_SOURCES += windows-rwlock.c
-
-## end   gnulib module windows-rwlock
-
 ## begin gnulib module xalloc

 libgnu_la_SOURCES += xmalloc.c
--- a/lib/_Noreturn.h
+++ b/lib/_Noreturn.h
@ -1,5 +1,5 @@
 /* A C macro for declaring that a function does not return.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
@ -17,11 +17,21 @@
 #ifndef _Noreturn
 # if (defined __cplusplus \
      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
-          || (defined _MSC_VER && 1900 <= _MSC_VER)))
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
 #  define _Noreturn [[noreturn]]
 # elif ((!defined __cplusplus || defined __clang__)                     \
        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0)  \
-            || 4 < __GNUC__ + (7 <= __GNUC_MINOR__)))
+            || 4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+            || (defined __apple_build_version__ \
+                ? 6000000 <= __apple_build_version__ \
+                : 3 < __clang_major__ + (5 <= __clang_minor__))))
   /* _Noreturn works as-is.  */
 # elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C
 #  define _Noreturn __attribute__ ((__noreturn__))
--- a/lib/alloca.in.h
+++ b/lib/alloca.in.h
@ -1,6 +1,6 @@
 /* Memory allocation on the stack.

-   Copyright (C) 1995, 1999, 2001-2004, 2006-2019 Free Software Foundation,
+   Copyright (C) 1995, 1999, 2001-2004, 2006-2020 Free Software Foundation,
   Inc.

   This program is free software; you can redistribute it and/or modify it
--- a/lib/arg-nonnull.h
+++ b/lib/arg-nonnull.h
@ -1,5 +1,5 @@
 /* A C macro for declaring that specific arguments must not be NULL.
-   Copyright (C) 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
--- a/lib/argmatch.c
+++ b/lib/argmatch.c
@ -1,6 +1,6 @@
 /* argmatch.c -- find a match for a string in an array

-   Copyright (C) 1990, 1998-1999, 2001-2007, 2009-2019 Free Software
+   Copyright (C) 1990, 1998-1999, 2001-2007, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/argmatch.h
+++ b/lib/argmatch.h
@ -1,6 +1,6 @@
 /* argmatch.h -- definitions and prototypes for argmatch.c

-   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2019 Free Software
+   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/argp-ba.c
+++ b/lib/argp-ba.c
@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_BUG_ADDRESS.
-   Copyright (C) 1996-2019 Free Software Foundation, Inc.
+   Copyright (C) 1996-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-eexst.c
+++ b/lib/argp-eexst.c
@ -1,5 +1,5 @@
 /* Default definition for ARGP_ERR_EXIT_STATUS
-   Copyright (C) 1997, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2009-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-fmtstream.c
+++ b/lib/argp-fmtstream.c
@ -1,5 +1,5 @@
 /* Word-wrapping and line-truncating streams
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-fmtstream.h
+++ b/lib/argp-fmtstream.h
@ -1,5 +1,5 @@
 /* Word-wrapping and line-truncating streams.
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-fs-xinl.c
+++ b/lib/argp-fs-xinl.c
@ -1,5 +1,5 @@
 /* Real definitions for extern inline functions in argp-fmtstream.h
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-help.c
+++ b/lib/argp-help.c
@ -1,5 +1,5 @@
 /* Hierarchical argument parsing help output
-   Copyright (C) 1995-2019 Free Software Foundation, Inc.
+   Copyright (C) 1995-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-namefrob.h
+++ b/lib/argp-namefrob.h
@ -1,5 +1,5 @@
 /* Name frobnication for compiling argp outside of glibc
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-parse.c
+++ b/lib/argp-parse.c
@ -1,5 +1,5 @@
 /* Hierarchical argument parsing, layered over getopt
-   Copyright (C) 1995-2019 Free Software Foundation, Inc.
+   Copyright (C) 1995-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-pin.c
+++ b/lib/argp-pin.c
@ -1,5 +1,5 @@
 /* Full and short program names for argp module
-   Copyright (C) 2005, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/argp-pv.c
+++ b/lib/argp-pv.c
@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_VERSION.
-   Copyright (C) 1996-2019 Free Software Foundation, Inc.
+   Copyright (C) 1996-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-pvh.c
+++ b/lib/argp-pvh.c
@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_VERSION_HOOK.
-   Copyright (C) 1996-2019 Free Software Foundation, Inc.
+   Copyright (C) 1996-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp-xinl.c
+++ b/lib/argp-xinl.c
@ -1,5 +1,5 @@
 /* Real definitions for extern inline functions in argp.h
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/argp.h
+++ b/lib/argp.h
@ -1,5 +1,5 @@
 /* Hierarchical argument parsing, layered over getopt.
-   Copyright (C) 1995-2019 Free Software Foundation, Inc.
+   Copyright (C) 1995-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

--- a/lib/asnprintf.c
+++ b/lib/asnprintf.c
@ -1,5 +1,5 @@
 /* Formatted output to strings.
-   Copyright (C) 1999, 2002, 2006, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2002, 2006, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/basename-lgpl.c
+++ b/lib/basename-lgpl.c
@ -1,6 +1,6 @@
 /* basename.c -- return the last element in a file name

-   Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2019 Free Software
+   Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/c++defs.h
+++ b/lib/c++defs.h
@ -1,5 +1,5 @@
 /* C++ compatible function declaration macros.
-   Copyright (C) 2010-2019 Free Software Foundation, Inc.
+   Copyright (C) 2010-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
@ -301,9 +301,6 @@
    _GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \
                         "The symbol ::" #func " refers to the system function. " \
                         "Use " #namespace "::" #func " instead.")
-# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-     extern __typeof__ (func) func
 # else
 #  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
     _GL_EXTERN_C int _gl_cxxalias_dummy
--- a/lib/c-ctype.h
+++ b/lib/c-ctype.h
@ -5,7 +5,7 @@
   <ctype.h> functions' behaviour depends on the current locale set via
   setlocale.

-   Copyright (C) 2000-2003, 2006, 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 2000-2003, 2006, 2008-2020 Free Software Foundation, Inc.

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
--- a/lib/c-strcase.h
+++ b/lib/c-strcase.h
@ -1,5 +1,5 @@
 /* Case-insensitive string comparison functions in C locale.
-   Copyright (C) 1995-1996, 2001, 2003, 2005, 2009-2019 Free Software
+   Copyright (C) 1995-1996, 2001, 2003, 2005, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
--- a/lib/c-strcasecmp.c
+++ b/lib/c-strcasecmp.c
@ -1,5 +1,5 @@
 /* c-strcasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/c-strcaseeq.h
+++ b/lib/c-strcaseeq.h
@ -1,5 +1,5 @@
 /* Optimized case-insensitive string comparison in C locale.
-   Copyright (C) 2001-2002, 2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2002, 2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
--- a/lib/c-strncasecmp.c
+++ b/lib/c-strncasecmp.c
@ -1,5 +1,5 @@
 /* c-strncasecmp.c -- case insensitive string comparator in C locale
-   Copyright (C) 1998-1999, 2005-2006, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1998-1999, 2005-2006, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/cdefs.h
+++ b/lib/cdefs.h
@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
--- a/lib/close-stream.c
+++ b/lib/close-stream.c
@ -1,6 +1,6 @@
 /* Close a stream, with nicer error checking than fclose's.

-   Copyright (C) 1998-2002, 2004, 2006-2019 Free Software Foundation, Inc.
+   Copyright (C) 1998-2002, 2004, 2006-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/closeout.c
+++ b/lib/closeout.c
@ -1,6 +1,6 @@
 /* Close standard output and standard error, exiting with a diagnostic on error.

-   Copyright (C) 1998-2002, 2004, 2006, 2008-2019 Free Software Foundation,
+   Copyright (C) 1998-2002, 2004, 2006, 2008-2020 Free Software Foundation,
   Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/closeout.h
+++ b/lib/closeout.h
@ -1,6 +1,6 @@
 /* Close standard output and standard error.

-   Copyright (C) 1998, 2000, 2003-2004, 2006, 2008-2019 Free Software
+   Copyright (C) 1998, 2000, 2003-2004, 2006, 2008-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/dirname-lgpl.c
+++ b/lib/dirname-lgpl.c
@ -1,6 +1,6 @@
 /* dirname.c -- return all but the last element in a file name

-   Copyright (C) 1990, 1998, 2000-2001, 2003-2006, 2009-2019 Free Software
+   Copyright (C) 1990, 1998, 2000-2001, 2003-2006, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/dirname.h
+++ b/lib/dirname.h
@ -1,6 +1,6 @@
 /*  Take file names apart into directory and base names.

-    Copyright (C) 1998, 2001, 2003-2006, 2009-2019 Free Software Foundation,
+    Copyright (C) 1998, 2001, 2003-2006, 2009-2020 Free Software Foundation,
    Inc.

    This program is free software: you can redistribute it and/or modify
@ -21,7 +21,7 @@

 # include <stdbool.h>
 # include <stddef.h>
-# include "dosname.h"
+# include "filename.h"

 # ifndef DIRECTORY_SEPARATOR
 #  define DIRECTORY_SEPARATOR '/'
--- a/lib/dosname.h
+++ b/lib/dosname.h
@ -1,52 +0,0 @@
-/* File names on MS-DOS/Windows systems.
-
-   Copyright (C) 2000-2001, 2004-2006, 2009-2019 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-   From Paul Eggert and Jim Meyering.  */
-
-#ifndef _DOSNAME_H
-#define _DOSNAME_H
-
-#if (defined _WIN32 || defined __CYGWIN__ \
-     || defined __EMX__ || defined __MSDOS__ || defined __DJGPP__)
-   /* This internal macro assumes ASCII, but all hosts that support drive
-      letters use ASCII.  */
-# define _IS_DRIVE_LETTER(C) (((unsigned int) (C) | ('a' - 'A')) - 'a'  \
-                              <= 'z' - 'a')
-# define FILE_SYSTEM_PREFIX_LEN(Filename) \
-          (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':' ? 2 : 0)
-# ifndef __CYGWIN__
-#  define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1
-# endif
-# define ISSLASH(C) ((C) == '/' || (C) == '\\')
-#else
-# define FILE_SYSTEM_PREFIX_LEN(Filename) 0
-# define ISSLASH(C) ((C) == '/')
-#endif
-
-#ifndef FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
-# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
-#endif
-
-#if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
-#  define IS_ABSOLUTE_FILE_NAME(F) ISSLASH ((F)[FILE_SYSTEM_PREFIX_LEN (F)])
-# else
-#  define IS_ABSOLUTE_FILE_NAME(F)                              \
-     (ISSLASH ((F)[0]) || FILE_SYSTEM_PREFIX_LEN (F) != 0)
-#endif
-#define IS_RELATIVE_FILE_NAME(F) (! IS_ABSOLUTE_FILE_NAME (F))
-
-#endif /* DOSNAME_H_ */
--- a/lib/errno.in.h
+++ b/lib/errno.in.h
@ -1,6 +1,6 @@
 /* A POSIX-like <errno.h>.

-   Copyright (C) 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 2008-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/error.c
+++ b/lib/error.c
@ -1,5 +1,5 @@
 /* Error handler for noninteractive utilities
-   Copyright (C) 1990-1998, 2000-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1990-1998, 2000-2007, 2009-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   This program is free software: you can redistribute it and/or modify
--- a/lib/error.h
+++ b/lib/error.h
@ -1,5 +1,5 @@
 /* Declaration for error-reporting function
-   Copyright (C) 1995-1997, 2003, 2006, 2008-2019 Free Software Foundation,
+   Copyright (C) 1995-1997, 2003, 2006, 2008-2020 Free Software Foundation,
   Inc.
   This file is part of the GNU C Library.

--- a/lib/exitfail.c
+++ b/lib/exitfail.c
@ -1,6 +1,6 @@
 /* Failure exit status

-   Copyright (C) 2002-2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2005-2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/exitfail.h
+++ b/lib/exitfail.h
@ -1,6 +1,6 @@
 /* Failure exit status

-   Copyright (C) 2002, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/fcntl.in.h
+++ b/lib/fcntl.in.h
@ -1,6 +1,6 @@
 /* Like <fcntl.h>, but with non-working flags defined to 0.

-   Copyright (C) 2006-2019 Free Software Foundation, Inc.
+   Copyright (C) 2006-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@ -39,6 +39,12 @@
 #endif
 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@

+/* Native Windows platforms declare open(), creat() in <io.h>.  */
+#if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__)
+# include <io.h>
+#endif
+
 #else
 /* Normal invocation convention.  */

@ -59,6 +65,12 @@
 /* The include_next requires a split double-inclusion guard.  */
 #@INCLUDE_NEXT@ @NEXT_FCNTL_H@

+/* Native Windows platforms declare open(), creat() in <io.h>.  */
+#if (@GNULIB_CREAT@ || @GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
+    && (defined _WIN32 && ! defined __CYGWIN__)
+# include <io.h>
+#endif
+
 #ifndef _@GUARD_PREFIX@_FCNTL_H
 #define _@GUARD_PREFIX@_FCNTL_H

@ -66,12 +78,6 @@
 # include <unistd.h>
 #endif

-/* Native Windows platforms declare open(), creat() in <io.h>.  */
-#if (@GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
-    && (defined _WIN32 && ! defined __CYGWIN__)
-# include <io.h>
-#endif
-

 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */

@ -82,6 +88,26 @@

 /* Declare overridden functions.  */

+#if @GNULIB_CREAT@
+# if @REPLACE_CREAT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef creat
+#   define creat rpl_creat
+#  endif
+_GL_FUNCDECL_RPL (creat, int, (const char *filename, mode_t mode)
+                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (creat, int, (const char *filename, mode_t mode));
+# else
+_GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode));
+# endif
+_GL_CXXALIASWARN (creat);
+#elif defined GNULIB_POSIXCHECK
+# undef creat
+/* Assume creat is always declared.  */
+_GL_WARN_ON_USE (creat, "creat is not always POSIX compliant - "
+                 "use gnulib module creat for portability");
+#endif
+
 #if @GNULIB_FCNTL@
 # if @REPLACE_FCNTL@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
@ -90,9 +116,15 @@
 #  endif
 _GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
 _GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
+#  if !GNULIB_defined_rpl_fcntl
+#   define GNULIB_defined_rpl_fcntl 1
+#  endif
 # else
 #  if !@HAVE_FCNTL@
 _GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
+#   if !GNULIB_defined_fcntl
+#    define GNULIB_defined_fcntl 1
+#   endif
 #  endif
 _GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
 # endif
--- a/lib/filename.h
+++ b/lib/filename.h
@ -1,5 +1,5 @@
 /* Basic filename support macros.
-   Copyright (C) 2001-2004, 2007-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2004, 2007-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@ -14,38 +14,94 @@
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

+/* From Paul Eggert and Jim Meyering.  */
+
 #ifndef _FILENAME_H
 #define _FILENAME_H

+#include <string.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif


-/* Pathname support.
-   ISSLASH(C)           tests whether C is a directory separator character.
-   IS_ABSOLUTE_PATH(P)  tests whether P is an absolute path.  If it is not,
-                        it may be concatenated to a directory pathname.
-   IS_PATH_WITH_DIR(P)  tests whether P contains a directory specification.
+/* Filename support.
+   ISSLASH(C)                  tests whether C is a directory separator
+                               character.
+   HAS_DEVICE(Filename)        tests whether Filename contains a device
+                               specification.
+   FILE_SYSTEM_PREFIX_LEN(Filename)  length of the device specification
+                                     at the beginning of Filename,
+                                     index of the part consisting of
+                                     alternating components and slashes.
+   FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+                               1 when a non-empty device specification
+                               can be followed by an empty or relative
+                               part,
+                               0 when a non-empty device specification
+                               must be followed by a slash,
+                               0 when device specification don't exist.
+   IS_ABSOLUTE_FILE_NAME(Filename)
+                               tests whether Filename is independent of
+                               any notion of "current directory".
+   IS_RELATIVE_FILE_NAME(Filename)
+                               tests whether Filename may be concatenated
+                               to a directory filename.
+   Note: On native Windows, OS/2, DOS, "c:" is neither an absolute nor a
+   relative file name!
+   IS_FILE_NAME_WITH_DIR(Filename)  tests whether Filename contains a device
+                                    or directory specification.
 */
-#if defined _WIN32 || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
+#if defined _WIN32 || defined __CYGWIN__ \
+    || defined __EMX__ || defined __MSDOS__ || defined __DJGPP__
  /* Native Windows, Cygwin, OS/2, DOS */
 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
-# define HAS_DEVICE(P) \
-    ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
-     && (P)[1] == ':')
-# define IS_ABSOLUTE_PATH(P) (ISSLASH ((P)[0]) || HAS_DEVICE (P))
-# define IS_PATH_WITH_DIR(P) \
-    (strchr (P, '/') != NULL || strchr (P, '\\') != NULL || HAS_DEVICE (P))
-# define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0)
+  /* Internal macro: Tests whether a character is a drive letter.  */
+# define _IS_DRIVE_LETTER(C) \
+    (((C) >= 'A' && (C) <= 'Z') || ((C) >= 'a' && (C) <= 'z'))
+  /* Help the compiler optimizing it.  This assumes ASCII.  */
+# undef _IS_DRIVE_LETTER
+# define _IS_DRIVE_LETTER(C) \
+    (((unsigned int) (C) | ('a' - 'A')) - 'a' <= 'z' - 'a')
+# define HAS_DEVICE(Filename) \
+    (_IS_DRIVE_LETTER ((Filename)[0]) && (Filename)[1] == ':')
+# define FILE_SYSTEM_PREFIX_LEN(Filename) (HAS_DEVICE (Filename) ? 2 : 0)
+# ifdef __CYGWIN__
+#  define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
+# else
+   /* On native Windows, OS/2, DOS, the system has the notion of a
+      "current directory" on each drive.  */
+#  define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 1
+# endif
+# if FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
+#  define IS_ABSOLUTE_FILE_NAME(Filename) \
+     ISSLASH ((Filename)[FILE_SYSTEM_PREFIX_LEN (Filename)])
+# else
+#  define IS_ABSOLUTE_FILE_NAME(Filename) \
+     (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename))
+# endif
+# define IS_RELATIVE_FILE_NAME(Filename) \
+    (! (ISSLASH ((Filename)[0]) || HAS_DEVICE (Filename)))
+# define IS_FILE_NAME_WITH_DIR(Filename) \
+    (strchr ((Filename), '/') != NULL || strchr ((Filename), '\\') != NULL \
+     || HAS_DEVICE (Filename))
 #else
  /* Unix */
 # define ISSLASH(C) ((C) == '/')
-# define IS_ABSOLUTE_PATH(P) ISSLASH ((P)[0])
-# define IS_PATH_WITH_DIR(P) (strchr (P, '/') != NULL)
-# define FILE_SYSTEM_PREFIX_LEN(P) 0
+# define HAS_DEVICE(Filename) ((void) (Filename), 0)
+# define FILE_SYSTEM_PREFIX_LEN(Filename) ((void) (Filename), 0)
+# define FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE 0
+# define IS_ABSOLUTE_FILE_NAME(Filename) ISSLASH ((Filename)[0])
+# define IS_RELATIVE_FILE_NAME(Filename) (! ISSLASH ((Filename)[0]))
+# define IS_FILE_NAME_WITH_DIR(Filename) (strchr ((Filename), '/') != NULL)
 #endif

+/* Deprecated macros.  For backward compatibility with old users of the
+   'filename' module.  */
+#define IS_ABSOLUTE_PATH IS_ABSOLUTE_FILE_NAME
+#define IS_PATH_WITH_DIR IS_FILE_NAME_WITH_DIR
+

 #ifdef __cplusplus
 }
--- a/lib/float+.h
+++ b/lib/float+.h
@ -1,5 +1,5 @@
 /* Supplemental information about the floating-point formats.
-   Copyright (C) 2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2007.

   This program is free software; you can redistribute it and/or modify
--- a/lib/float.c
+++ b/lib/float.c
@ -1,5 +1,5 @@
 /* Auxiliary definitions for <float.h>.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2011.

   This program is free software: you can redistribute it and/or modify
--- a/lib/float.in.h
+++ b/lib/float.in.h
@ -1,6 +1,6 @@
 /* A correct <float.h>.

-   Copyright (C) 2007-2019 Free Software Foundation, Inc.
+   Copyright (C) 2007-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/fpending.c
+++ b/lib/fpending.c
@ -1,5 +1,5 @@
 /* fpending.c -- return the number of pending output bytes on a stream
-   Copyright (C) 2000, 2004, 2006-2007, 2009-2019 Free Software Foundation,
+   Copyright (C) 2000, 2004, 2006-2007, 2009-2020 Free Software Foundation,
   Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/fpending.h
+++ b/lib/fpending.h
@ -1,6 +1,6 @@
 /* Declare __fpending.

-   Copyright (C) 2000, 2003, 2005-2006, 2009-2019 Free Software Foundation,
+   Copyright (C) 2000, 2003, 2005-2006, 2009-2020 Free Software Foundation,
   Inc.

   This program is free software: you can redistribute it and/or modify
--- a/lib/getopt-cdefs.in.h
+++ b/lib/getopt-cdefs.in.h
@ -1,5 +1,5 @@
 /* getopt-on-non-glibc compatibility macros.
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of gnulib.
   Unlike most of the getopt implementation, it is NOT shared
   with the GNU C Library.
--- a/lib/getopt-core.h
+++ b/lib/getopt-core.h
@ -1,5 +1,5 @@
 /* Declarations for getopt (basic, portable features only).
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library and is also part of gnulib.
   Patches to this file should be submitted to both projects.

--- a/lib/getopt-ext.h
+++ b/lib/getopt-ext.h
@ -1,5 +1,5 @@
 /* Declarations for getopt (GNU extensions).
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library and is also part of gnulib.
   Patches to this file should be submitted to both projects.

--- a/lib/getopt-pfx-core.h
+++ b/lib/getopt-pfx-core.h
@ -1,5 +1,5 @@
 /* getopt (basic, portable features) gnulib wrapper header.
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of gnulib.
   Unlike most of the getopt implementation, it is NOT shared
   with the GNU C Library.
@ -48,6 +48,14 @@
 # define optind __GETOPT_ID (optind)
 # define optopt __GETOPT_ID (optopt)

+/* Work around a a problem on macOS, which declares getopt with a
+   trailing __DARWIN_ALIAS(getopt) that would expand to something like
+   __asm("_" "rpl_getopt" "$UNIX2003") were it not for the following
+   hack to suppress the macOS declaration <https://bugs.gnu.org/40205>.  */
+# ifdef __APPLE__
+#  define _GETOPT
+# endif
+
 /* The system's getopt.h may have already included getopt-core.h to
   declare the unprefixed identifiers.  Undef _GETOPT_CORE_H so that
   getopt-core.h declares them with prefixes.  */
--- a/lib/getopt-pfx-ext.h
+++ b/lib/getopt-pfx-ext.h
@ -1,5 +1,5 @@
 /* getopt (GNU extensions) gnulib wrapper header.
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of gnulib.
   Unlike most of the getopt implementation, it is NOT shared
   with the GNU C Library.
--- a/lib/getopt.c
+++ b/lib/getopt.c
@ -1,5 +1,5 @@
 /* Getopt for GNU.
-   Copyright (C) 1987-2019 Free Software Foundation, Inc.
+   Copyright (C) 1987-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library and is also part of gnulib.
   Patches to this file should be submitted to both projects.

--- a/lib/getopt.in.h
+++ b/lib/getopt.in.h
@ -1,5 +1,5 @@
 /* Declarations for getopt.
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of gnulib.
   Unlike most of the getopt implementation, it is NOT shared
   with the GNU C Library, which supplies a different version of
--- a/lib/getopt1.c
+++ b/lib/getopt1.c
@ -1,5 +1,5 @@
 /* getopt_long and getopt_long_only entry points for GNU getopt.
-   Copyright (C) 1987-2019 Free Software Foundation, Inc.
+   Copyright (C) 1987-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library and is also part of gnulib.
   Patches to this file should be submitted to both projects.

--- a/lib/getopt_int.h
+++ b/lib/getopt_int.h
@ -1,5 +1,5 @@
 /* Internal declarations for getopt.
-   Copyright (C) 1989-2019 Free Software Foundation, Inc.
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library and is also part of gnulib.
   Patches to this file should be submitted to both projects.

--- a/lib/getprogname.c
+++ b/lib/getprogname.c
@ -1,5 +1,5 @@
 /* Program name management.
-   Copyright (C) 2016-2019 Free Software Foundation, Inc.
+   Copyright (C) 2016-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/getprogname.h
+++ b/lib/getprogname.h
@ -1,5 +1,5 @@
 /* Program name management.
-   Copyright (C) 2016-2019 Free Software Foundation, Inc.
+   Copyright (C) 2016-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/gettext.h
+++ b/lib/gettext.h
@ -1,5 +1,5 @@
 /* Convenience header for conditional use of GNU <libintl.h>.
-   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2019 Free Software
+   Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
--- a/lib/gettimeofday.c
+++ b/lib/gettimeofday.c
@ -1,6 +1,6 @@
 /* Provide gettimeofday for systems that don't have it or for which it's broken.

-   Copyright (C) 2001-2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/glthread/lock.c
+++ b/lib/glthread/lock.c
@ -1,506 +0,0 @@
-/* Locking in multithreaded situations.
-   Copyright (C) 2005-2019 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
-
-/* Written by Bruno Haible <bruno@clisp.org>, 2005.
-   Based on GCC's gthr-posix.h, gthr-posix95.h.  */
-
-#include <config.h>
-
-#include "glthread/lock.h"
-
-/* ========================================================================= */
-
-#if USE_POSIX_THREADS
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
-
-#  ifdef PTHREAD_RWLOCK_INITIALIZER
-
-#   if !HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
-     /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
-
-int
-glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock)
-{
-  pthread_rwlockattr_t attributes;
-  int err;
-
-  err = pthread_rwlockattr_init (&attributes);
-  if (err != 0)
-    return err;
-  /* Note: PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP is the only value that
-     causes the writer to be preferred. PTHREAD_RWLOCK_PREFER_WRITER_NP does not
-     do this; see
-     http://man7.org/linux/man-pages/man3/pthread_rwlockattr_setkind_np.3.html */
-  err = pthread_rwlockattr_setkind_np (&attributes,
-                                       PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
-  if (err == 0)
-    err = pthread_rwlock_init(lock, &attributes);
-  /* pthread_rwlockattr_destroy always returns 0.  It cannot influence the
-     return value.  */
-  pthread_rwlockattr_destroy (&attributes);
-  return err;
-}
-
-#   endif
-#  else
-
-int
-glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_rwlock_init (&lock->rwlock, NULL);
-  if (err != 0)
-    return err;
-  lock->initialized = 1;
-  return 0;
-}
-
-int
-glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
-{
-  if (!lock->initialized)
-    {
-      int err;
-
-      err = pthread_mutex_lock (&lock->guard);
-      if (err != 0)
-        return err;
-      if (!lock->initialized)
-        {
-          err = glthread_rwlock_init_multithreaded (lock);
-          if (err != 0)
-            {
-              pthread_mutex_unlock (&lock->guard);
-              return err;
-            }
-        }
-      err = pthread_mutex_unlock (&lock->guard);
-      if (err != 0)
-        return err;
-    }
-  return pthread_rwlock_rdlock (&lock->rwlock);
-}
-
-int
-glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
-{
-  if (!lock->initialized)
-    {
-      int err;
-
-      err = pthread_mutex_lock (&lock->guard);
-      if (err != 0)
-        return err;
-      if (!lock->initialized)
-        {
-          err = glthread_rwlock_init_multithreaded (lock);
-          if (err != 0)
-            {
-              pthread_mutex_unlock (&lock->guard);
-              return err;
-            }
-        }
-      err = pthread_mutex_unlock (&lock->guard);
-      if (err != 0)
-        return err;
-    }
-  return pthread_rwlock_wrlock (&lock->rwlock);
-}
-
-int
-glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
-{
-  if (!lock->initialized)
-    return EINVAL;
-  return pthread_rwlock_unlock (&lock->rwlock);
-}
-
-int
-glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  if (!lock->initialized)
-    return EINVAL;
-  err = pthread_rwlock_destroy (&lock->rwlock);
-  if (err != 0)
-    return err;
-  lock->initialized = 0;
-  return 0;
-}
-
-#  endif
-
-# else
-
-int
-glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_init (&lock->lock, NULL);
-  if (err != 0)
-    return err;
-  err = pthread_cond_init (&lock->waiting_readers, NULL);
-  if (err != 0)
-    return err;
-  err = pthread_cond_init (&lock->waiting_writers, NULL);
-  if (err != 0)
-    return err;
-  lock->waiting_writers_count = 0;
-  lock->runcount = 0;
-  return 0;
-}
-
-int
-glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_lock (&lock->lock);
-  if (err != 0)
-    return err;
-  /* Test whether only readers are currently running, and whether the runcount
-     field will not overflow, and whether no writer is waiting.  The latter
-     condition is because POSIX recommends that "write locks shall take
-     precedence over read locks", to avoid "writer starvation".  */
-  while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
-    {
-      /* This thread has to wait for a while.  Enqueue it among the
-         waiting_readers.  */
-      err = pthread_cond_wait (&lock->waiting_readers, &lock->lock);
-      if (err != 0)
-        {
-          pthread_mutex_unlock (&lock->lock);
-          return err;
-        }
-    }
-  lock->runcount++;
-  return pthread_mutex_unlock (&lock->lock);
-}
-
-int
-glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_lock (&lock->lock);
-  if (err != 0)
-    return err;
-  /* Test whether no readers or writers are currently running.  */
-  while (!(lock->runcount == 0))
-    {
-      /* This thread has to wait for a while.  Enqueue it among the
-         waiting_writers.  */
-      lock->waiting_writers_count++;
-      err = pthread_cond_wait (&lock->waiting_writers, &lock->lock);
-      if (err != 0)
-        {
-          lock->waiting_writers_count--;
-          pthread_mutex_unlock (&lock->lock);
-          return err;
-        }
-      lock->waiting_writers_count--;
-    }
-  lock->runcount--; /* runcount becomes -1 */
-  return pthread_mutex_unlock (&lock->lock);
-}
-
-int
-glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_lock (&lock->lock);
-  if (err != 0)
-    return err;
-  if (lock->runcount < 0)
-    {
-      /* Drop a writer lock.  */
-      if (!(lock->runcount == -1))
-        {
-          pthread_mutex_unlock (&lock->lock);
-          return EINVAL;
-        }
-      lock->runcount = 0;
-    }
-  else
-    {
-      /* Drop a reader lock.  */
-      if (!(lock->runcount > 0))
-        {
-          pthread_mutex_unlock (&lock->lock);
-          return EINVAL;
-        }
-      lock->runcount--;
-    }
-  if (lock->runcount == 0)
-    {
-      /* POSIX recommends that "write locks shall take precedence over read
-         locks", to avoid "writer starvation".  */
-      if (lock->waiting_writers_count > 0)
-        {
-          /* Wake up one of the waiting writers.  */
-          err = pthread_cond_signal (&lock->waiting_writers);
-          if (err != 0)
-            {
-              pthread_mutex_unlock (&lock->lock);
-              return err;
-            }
-        }
-      else
-        {
-          /* Wake up all waiting readers.  */
-          err = pthread_cond_broadcast (&lock->waiting_readers);
-          if (err != 0)
-            {
-              pthread_mutex_unlock (&lock->lock);
-              return err;
-            }
-        }
-    }
-  return pthread_mutex_unlock (&lock->lock);
-}
-
-int
-glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_destroy (&lock->lock);
-  if (err != 0)
-    return err;
-  err = pthread_cond_destroy (&lock->waiting_readers);
-  if (err != 0)
-    return err;
-  err = pthread_cond_destroy (&lock->waiting_writers);
-  if (err != 0)
-    return err;
-  return 0;
-}
-
-# endif
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-# if HAVE_PTHREAD_MUTEX_RECURSIVE
-
-#  if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
-
-int
-glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
-{
-  pthread_mutexattr_t attributes;
-  int err;
-
-  err = pthread_mutexattr_init (&attributes);
-  if (err != 0)
-    return err;
-  err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
-  if (err != 0)
-    {
-      pthread_mutexattr_destroy (&attributes);
-      return err;
-    }
-  err = pthread_mutex_init (lock, &attributes);
-  if (err != 0)
-    {
-      pthread_mutexattr_destroy (&attributes);
-      return err;
-    }
-  err = pthread_mutexattr_destroy (&attributes);
-  if (err != 0)
-    return err;
-  return 0;
-}
-
-#  else
-
-int
-glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
-{
-  pthread_mutexattr_t attributes;
-  int err;
-
-  err = pthread_mutexattr_init (&attributes);
-  if (err != 0)
-    return err;
-  err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
-  if (err != 0)
-    {
-      pthread_mutexattr_destroy (&attributes);
-      return err;
-    }
-  err = pthread_mutex_init (&lock->recmutex, &attributes);
-  if (err != 0)
-    {
-      pthread_mutexattr_destroy (&attributes);
-      return err;
-    }
-  err = pthread_mutexattr_destroy (&attributes);
-  if (err != 0)
-    return err;
-  lock->initialized = 1;
-  return 0;
-}
-
-int
-glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
-{
-  if (!lock->initialized)
-    {
-      int err;
-
-      err = pthread_mutex_lock (&lock->guard);
-      if (err != 0)
-        return err;
-      if (!lock->initialized)
-        {
-          err = glthread_recursive_lock_init_multithreaded (lock);
-          if (err != 0)
-            {
-              pthread_mutex_unlock (&lock->guard);
-              return err;
-            }
-        }
-      err = pthread_mutex_unlock (&lock->guard);
-      if (err != 0)
-        return err;
-    }
-  return pthread_mutex_lock (&lock->recmutex);
-}
-
-int
-glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
-{
-  if (!lock->initialized)
-    return EINVAL;
-  return pthread_mutex_unlock (&lock->recmutex);
-}
-
-int
-glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
-{
-  int err;
-
-  if (!lock->initialized)
-    return EINVAL;
-  err = pthread_mutex_destroy (&lock->recmutex);
-  if (err != 0)
-    return err;
-  lock->initialized = 0;
-  return 0;
-}
-
-#  endif
-
-# else
-
-int
-glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
-{
-  int err;
-
-  err = pthread_mutex_init (&lock->mutex, NULL);
-  if (err != 0)
-    return err;
-  lock->owner = (pthread_t) 0;
-  lock->depth = 0;
-  return 0;
-}
-
-int
-glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
-{
-  pthread_t self = pthread_self ();
-  if (lock->owner != self)
-    {
-      int err;
-
-      err = pthread_mutex_lock (&lock->mutex);
-      if (err != 0)
-        return err;
-      lock->owner = self;
-    }
-  if (++(lock->depth) == 0) /* wraparound? */
-    {
-      lock->depth--;
-      return EAGAIN;
-    }
-  return 0;
-}
-
-int
-glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
-{
-  if (lock->owner != pthread_self ())
-    return EPERM;
-  if (lock->depth == 0)
-    return EINVAL;
-  if (--(lock->depth) == 0)
-    {
-      lock->owner = (pthread_t) 0;
-      return pthread_mutex_unlock (&lock->mutex);
-    }
-  else
-    return 0;
-}
-
-int
-glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
-{
-  if (lock->owner != (pthread_t) 0)
-    return EBUSY;
-  return pthread_mutex_destroy (&lock->mutex);
-}
-
-# endif
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-static const pthread_once_t fresh_once = PTHREAD_ONCE_INIT;
-
-int
-glthread_once_singlethreaded (pthread_once_t *once_control)
-{
-  /* We don't know whether pthread_once_t is an integer type, a floating-point
-     type, a pointer type, or a structure type.  */
-  char *firstbyte = (char *)once_control;
-  if (*firstbyte == *(const char *)&fresh_once)
-    {
-      /* First time use of once_control.  Invert the first byte.  */
-      *firstbyte = ~ *(const char *)&fresh_once;
-      return 1;
-    }
-  else
-    return 0;
-}
-
-#endif
-
-/* ========================================================================= */
-
-#if USE_WINDOWS_THREADS
-
-#endif
-
-/* ========================================================================= */
--- a/lib/glthread/lock.h
+++ b/lib/glthread/lock.h
@ -1,666 +0,0 @@
-/* Locking in multithreaded situations.
-   Copyright (C) 2005-2019 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
-
-/* Written by Bruno Haible <bruno@clisp.org>, 2005.
-   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
-
-/* This file contains locking primitives for use with a given thread library.
-   It does not contain primitives for creating threads or for other
-   synchronization primitives.
-
-   Normal (non-recursive) locks:
-     Type:                gl_lock_t
-     Declaration:         gl_lock_define(extern, name)
-     Initializer:         gl_lock_define_initialized(, name)
-     Initialization:      gl_lock_init (name);
-     Taking the lock:     gl_lock_lock (name);
-     Releasing the lock:  gl_lock_unlock (name);
-     De-initialization:   gl_lock_destroy (name);
-   Equivalent functions with control of error handling:
-     Initialization:      err = glthread_lock_init (&name);
-     Taking the lock:     err = glthread_lock_lock (&name);
-     Releasing the lock:  err = glthread_lock_unlock (&name);
-     De-initialization:   err = glthread_lock_destroy (&name);
-
-   Read-Write (non-recursive) locks:
-     Type:                gl_rwlock_t
-     Declaration:         gl_rwlock_define(extern, name)
-     Initializer:         gl_rwlock_define_initialized(, name)
-     Initialization:      gl_rwlock_init (name);
-     Taking the lock:     gl_rwlock_rdlock (name);
-                          gl_rwlock_wrlock (name);
-     Releasing the lock:  gl_rwlock_unlock (name);
-     De-initialization:   gl_rwlock_destroy (name);
-   Equivalent functions with control of error handling:
-     Initialization:      err = glthread_rwlock_init (&name);
-     Taking the lock:     err = glthread_rwlock_rdlock (&name);
-                          err = glthread_rwlock_wrlock (&name);
-     Releasing the lock:  err = glthread_rwlock_unlock (&name);
-     De-initialization:   err = glthread_rwlock_destroy (&name);
-
-   Recursive locks:
-     Type:                gl_recursive_lock_t
-     Declaration:         gl_recursive_lock_define(extern, name)
-     Initializer:         gl_recursive_lock_define_initialized(, name)
-     Initialization:      gl_recursive_lock_init (name);
-     Taking the lock:     gl_recursive_lock_lock (name);
-     Releasing the lock:  gl_recursive_lock_unlock (name);
-     De-initialization:   gl_recursive_lock_destroy (name);
-   Equivalent functions with control of error handling:
-     Initialization:      err = glthread_recursive_lock_init (&name);
-     Taking the lock:     err = glthread_recursive_lock_lock (&name);
-     Releasing the lock:  err = glthread_recursive_lock_unlock (&name);
-     De-initialization:   err = glthread_recursive_lock_destroy (&name);
-
-  Once-only execution:
-     Type:                gl_once_t
-     Initializer:         gl_once_define(extern, name)
-     Execution:           gl_once (name, initfunction);
-   Equivalent functions with control of error handling:
-     Execution:           err = glthread_once (&name, initfunction);
-*/
-
-
-#ifndef _LOCK_H
-#define _LOCK_H
-
-#include <errno.h>
-#include <stdlib.h>
-
-#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
-#  include <threads.h>
-#  pragma weak thrd_exit
-#  define c11_threads_in_use() (thrd_exit != NULL)
-# else
-#  define c11_threads_in_use() 0
-# endif
-#endif
-
-/* ========================================================================= */
-
-#if USE_POSIX_THREADS
-
-/* Use the POSIX threads library.  */
-
-# include <pthread.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-# if PTHREAD_IN_USE_DETECTION_HARD
-
-/* The pthread_in_use() detection needs to be done at runtime.  */
-#  define pthread_in_use() \
-     glthread_in_use ()
-extern int glthread_in_use (void);
-
-# endif
-
-# if USE_POSIX_THREADS_WEAK
-
-/* Use weak references to the POSIX threads library.  */
-
-/* Weak references avoid dragging in external libraries if the other parts
-   of the program don't use them.  Here we use them, because we don't want
-   every program that uses libintl to depend on libpthread.  This assumes
-   that libpthread would not be loaded after libintl; i.e. if libintl is
-   loaded first, by an executable that does not depend on libpthread, and
-   then a module is dynamically loaded that depends on libpthread, libintl
-   will not be multithread-safe.  */
-
-/* The way to test at runtime whether libpthread is present is to test
-   whether a function pointer's value, such as &pthread_mutex_init, is
-   non-NULL.  However, some versions of GCC have a bug through which, in
-   PIC mode, &foo != NULL always evaluates to true if there is a direct
-   call to foo(...) in the same function.  To avoid this, we test the
-   address of a function in libpthread that we don't use.  */
-
-#  pragma weak pthread_mutex_init
-#  pragma weak pthread_mutex_lock
-#  pragma weak pthread_mutex_unlock
-#  pragma weak pthread_mutex_destroy
-#  pragma weak pthread_rwlock_init
-#  pragma weak pthread_rwlock_rdlock
-#  pragma weak pthread_rwlock_wrlock
-#  pragma weak pthread_rwlock_unlock
-#  pragma weak pthread_rwlock_destroy
-#  pragma weak pthread_once
-#  pragma weak pthread_cond_init
-#  pragma weak pthread_cond_wait
-#  pragma weak pthread_cond_signal
-#  pragma weak pthread_cond_broadcast
-#  pragma weak pthread_cond_destroy
-#  pragma weak pthread_mutexattr_init
-#  pragma weak pthread_mutexattr_settype
-#  pragma weak pthread_mutexattr_destroy
-#  pragma weak pthread_rwlockattr_init
-#  if __GNU_LIBRARY__ > 1
-#   pragma weak pthread_rwlockattr_setkind_np
-#  endif
-#  pragma weak pthread_rwlockattr_destroy
-#  ifndef pthread_self
-#   pragma weak pthread_self
-#  endif
-
-#  if !PTHREAD_IN_USE_DETECTION_HARD
-    /* Considering all platforms with USE_POSIX_THREADS_WEAK, only few symbols
-       can be used to determine whether libpthread is in use.  These are:
-         pthread_mutexattr_gettype
-         pthread_rwlockattr_destroy
-         pthread_rwlockattr_init
-     */
-#   pragma weak pthread_mutexattr_gettype
-#   define pthread_in_use() \
-      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
-#  endif
-
-# else
-
-#  if !PTHREAD_IN_USE_DETECTION_HARD
-#   define pthread_in_use() 1
-#  endif
-
-# endif
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-typedef pthread_mutex_t gl_lock_t;
-# define gl_lock_define(STORAGECLASS, NAME) \
-    STORAGECLASS pthread_mutex_t NAME;
-# define gl_lock_define_initialized(STORAGECLASS, NAME) \
-    STORAGECLASS pthread_mutex_t NAME = gl_lock_initializer;
-# define gl_lock_initializer \
-    PTHREAD_MUTEX_INITIALIZER
-# define glthread_lock_init(LOCK) \
-    (pthread_in_use () ? pthread_mutex_init (LOCK, NULL) : 0)
-# define glthread_lock_lock(LOCK) \
-    (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
-# define glthread_lock_unlock(LOCK) \
-    (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
-# define glthread_lock_destroy(LOCK) \
-    (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
-
-#  ifdef PTHREAD_RWLOCK_INITIALIZER
-
-typedef pthread_rwlock_t gl_rwlock_t;
-#   define gl_rwlock_define(STORAGECLASS, NAME) \
-      STORAGECLASS pthread_rwlock_t NAME;
-#   define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
-      STORAGECLASS pthread_rwlock_t NAME = gl_rwlock_initializer;
-#   if HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
-#    define gl_rwlock_initializer \
-       PTHREAD_RWLOCK_INITIALIZER
-#    define glthread_rwlock_init(LOCK) \
-       (pthread_in_use () ? pthread_rwlock_init (LOCK, NULL) : 0)
-#   else /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
-#    define gl_rwlock_initializer \
-       PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
-#    define glthread_rwlock_init(LOCK) \
-       (pthread_in_use () ? glthread_rwlock_init_for_glibc (LOCK) : 0)
-extern int glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock);
-#   endif
-#   define glthread_rwlock_rdlock(LOCK) \
-      (pthread_in_use () ? pthread_rwlock_rdlock (LOCK) : 0)
-#   define glthread_rwlock_wrlock(LOCK) \
-      (pthread_in_use () ? pthread_rwlock_wrlock (LOCK) : 0)
-#   define glthread_rwlock_unlock(LOCK) \
-      (pthread_in_use () ? pthread_rwlock_unlock (LOCK) : 0)
-#   define glthread_rwlock_destroy(LOCK) \
-      (pthread_in_use () ? pthread_rwlock_destroy (LOCK) : 0)
-
-#  else
-
-typedef struct
-        {
-          int initialized;
-          pthread_mutex_t guard;   /* protects the initialization */
-          pthread_rwlock_t rwlock; /* read-write lock */
-        }
-        gl_rwlock_t;
-#   define gl_rwlock_define(STORAGECLASS, NAME) \
-      STORAGECLASS gl_rwlock_t NAME;
-#   define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
-      STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
-#   define gl_rwlock_initializer \
-      { 0, PTHREAD_MUTEX_INITIALIZER }
-#   define glthread_rwlock_init(LOCK) \
-      (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
-#   define glthread_rwlock_rdlock(LOCK) \
-      (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
-#   define glthread_rwlock_wrlock(LOCK) \
-      (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
-#   define glthread_rwlock_unlock(LOCK) \
-      (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
-#   define glthread_rwlock_destroy(LOCK) \
-      (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
-extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
-
-#  endif
-
-# else
-
-typedef struct
-        {
-          pthread_mutex_t lock; /* protects the remaining fields */
-          pthread_cond_t waiting_readers; /* waiting readers */
-          pthread_cond_t waiting_writers; /* waiting writers */
-          unsigned int waiting_writers_count; /* number of waiting writers */
-          int runcount; /* number of readers running, or -1 when a writer runs */
-        }
-        gl_rwlock_t;
-# define gl_rwlock_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_rwlock_t NAME;
-# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
-    STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
-# define gl_rwlock_initializer \
-    { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
-# define glthread_rwlock_init(LOCK) \
-    (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
-# define glthread_rwlock_rdlock(LOCK) \
-    (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_wrlock(LOCK) \
-    (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_unlock(LOCK) \
-    (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_destroy(LOCK) \
-    (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
-extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
-
-# endif
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-# if HAVE_PTHREAD_MUTEX_RECURSIVE
-
-#  if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
-
-typedef pthread_mutex_t gl_recursive_lock_t;
-#   define gl_recursive_lock_define(STORAGECLASS, NAME) \
-      STORAGECLASS pthread_mutex_t NAME;
-#   define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
-      STORAGECLASS pthread_mutex_t NAME = gl_recursive_lock_initializer;
-#   ifdef PTHREAD_RECURSIVE_MUTEX_INITIALIZER
-#    define gl_recursive_lock_initializer \
-       PTHREAD_RECURSIVE_MUTEX_INITIALIZER
-#   else
-#    define gl_recursive_lock_initializer \
-       PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
-#   endif
-#   define glthread_recursive_lock_init(LOCK) \
-      (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
-#   define glthread_recursive_lock_lock(LOCK) \
-      (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
-#   define glthread_recursive_lock_unlock(LOCK) \
-      (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
-#   define glthread_recursive_lock_destroy(LOCK) \
-      (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
-extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
-
-#  else
-
-typedef struct
-        {
-          pthread_mutex_t recmutex; /* recursive mutex */
-          pthread_mutex_t guard;    /* protects the initialization */
-          int initialized;
-        }
-        gl_recursive_lock_t;
-#   define gl_recursive_lock_define(STORAGECLASS, NAME) \
-      STORAGECLASS gl_recursive_lock_t NAME;
-#   define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
-      STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
-#   define gl_recursive_lock_initializer \
-      { PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 0 }
-#   define glthread_recursive_lock_init(LOCK) \
-      (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
-#   define glthread_recursive_lock_lock(LOCK) \
-      (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
-#   define glthread_recursive_lock_unlock(LOCK) \
-      (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
-#   define glthread_recursive_lock_destroy(LOCK) \
-      (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
-extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
-
-#  endif
-
-# else
-
-/* Old versions of POSIX threads on Solaris did not have recursive locks.
-   We have to implement them ourselves.  */
-
-typedef struct
-        {
-          pthread_mutex_t mutex;
-          pthread_t owner;
-          unsigned long depth;
-        }
-        gl_recursive_lock_t;
-#  define gl_recursive_lock_define(STORAGECLASS, NAME) \
-     STORAGECLASS gl_recursive_lock_t NAME;
-#  define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
-     STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
-#  define gl_recursive_lock_initializer \
-     { PTHREAD_MUTEX_INITIALIZER, (pthread_t) 0, 0 }
-#  define glthread_recursive_lock_init(LOCK) \
-     (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
-#  define glthread_recursive_lock_lock(LOCK) \
-     (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
-#  define glthread_recursive_lock_unlock(LOCK) \
-     (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
-#  define glthread_recursive_lock_destroy(LOCK) \
-     (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
-extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
-extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
-
-# endif
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef pthread_once_t gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
-    STORAGECLASS pthread_once_t NAME = PTHREAD_ONCE_INIT;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
-    (pthread_in_use ()                                                         \
-     ? pthread_once (ONCE_CONTROL, INITFUNCTION)                               \
-     : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
-extern int glthread_once_singlethreaded (pthread_once_t *once_control);
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
-#if USE_WINDOWS_THREADS
-
-# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
-# include <windows.h>
-
-# include "windows-mutex.h"
-# include "windows-rwlock.h"
-# include "windows-recmutex.h"
-# include "windows-once.h"
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-/* We can use CRITICAL_SECTION directly, rather than the native Windows Event,
-   Mutex, Semaphore types, because
-     - we need only to synchronize inside a single process (address space),
-       not inter-process locking,
-     - we don't need to support trylock operations.  (TryEnterCriticalSection
-       does not work on Windows 95/98/ME.  Packages that need trylock usually
-       define their own mutex type.)  */
-
-/* There is no way to statically initialize a CRITICAL_SECTION.  It needs
-   to be done lazily, once only.  For this we need spinlocks.  */
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-typedef glwthread_mutex_t gl_lock_t;
-# define gl_lock_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_lock_t NAME;
-# define gl_lock_define_initialized(STORAGECLASS, NAME) \
-    STORAGECLASS gl_lock_t NAME = gl_lock_initializer;
-# define gl_lock_initializer \
-    GLWTHREAD_MUTEX_INIT
-# define glthread_lock_init(LOCK) \
-    (glwthread_mutex_init (LOCK), 0)
-# define glthread_lock_lock(LOCK) \
-    glwthread_mutex_lock (LOCK)
-# define glthread_lock_unlock(LOCK) \
-    glwthread_mutex_unlock (LOCK)
-# define glthread_lock_destroy(LOCK) \
-    glwthread_mutex_destroy (LOCK)
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-typedef glwthread_rwlock_t gl_rwlock_t;
-# define gl_rwlock_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_rwlock_t NAME;
-# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
-    STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
-# define gl_rwlock_initializer \
-    GLWTHREAD_RWLOCK_INIT
-# define glthread_rwlock_init(LOCK) \
-    (glwthread_rwlock_init (LOCK), 0)
-# define glthread_rwlock_rdlock(LOCK) \
-    glwthread_rwlock_rdlock (LOCK)
-# define glthread_rwlock_wrlock(LOCK) \
-    glwthread_rwlock_wrlock (LOCK)
-# define glthread_rwlock_unlock(LOCK) \
-    glwthread_rwlock_unlock (LOCK)
-# define glthread_rwlock_destroy(LOCK) \
-    glwthread_rwlock_destroy (LOCK)
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-typedef glwthread_recmutex_t gl_recursive_lock_t;
-# define gl_recursive_lock_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_recursive_lock_t NAME;
-# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
-    STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
-# define gl_recursive_lock_initializer \
-    GLWTHREAD_RECMUTEX_INIT
-# define glthread_recursive_lock_init(LOCK) \
-    (glwthread_recmutex_init (LOCK), 0)
-# define glthread_recursive_lock_lock(LOCK) \
-    glwthread_recmutex_lock (LOCK)
-# define glthread_recursive_lock_unlock(LOCK) \
-    glwthread_recmutex_unlock (LOCK)
-# define glthread_recursive_lock_destroy(LOCK) \
-    glwthread_recmutex_destroy (LOCK)
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef glwthread_once_t gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_once_t NAME = GLWTHREAD_ONCE_INIT;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
-    (glwthread_once (ONCE_CONTROL, INITFUNCTION), 0)
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
-#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
-
-/* Provide dummy implementation if threads are not supported.  */
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-typedef int gl_lock_t;
-# define gl_lock_define(STORAGECLASS, NAME)
-# define gl_lock_define_initialized(STORAGECLASS, NAME)
-# define glthread_lock_init(NAME) 0
-# define glthread_lock_lock(NAME) 0
-# define glthread_lock_unlock(NAME) 0
-# define glthread_lock_destroy(NAME) 0
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-typedef int gl_rwlock_t;
-# define gl_rwlock_define(STORAGECLASS, NAME)
-# define gl_rwlock_define_initialized(STORAGECLASS, NAME)
-# define glthread_rwlock_init(NAME) 0
-# define glthread_rwlock_rdlock(NAME) 0
-# define glthread_rwlock_wrlock(NAME) 0
-# define glthread_rwlock_unlock(NAME) 0
-# define glthread_rwlock_destroy(NAME) 0
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-typedef int gl_recursive_lock_t;
-# define gl_recursive_lock_define(STORAGECLASS, NAME)
-# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME)
-# define glthread_recursive_lock_init(NAME) 0
-# define glthread_recursive_lock_lock(NAME) 0
-# define glthread_recursive_lock_unlock(NAME) 0
-# define glthread_recursive_lock_destroy(NAME) 0
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef int gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
-    STORAGECLASS gl_once_t NAME = 0;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
-    (*(ONCE_CONTROL) == 0 ? (*(ONCE_CONTROL) = ~ 0, INITFUNCTION (), 0) : 0)
-
-#endif
-
-/* ========================================================================= */
-
-/* Macros with built-in error handling.  */
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-#define gl_lock_init(NAME) \
-   do                                  \
-     {                                 \
-       if (glthread_lock_init (&NAME)) \
-         abort ();                     \
-     }                                 \
-   while (0)
-#define gl_lock_lock(NAME) \
-   do                                  \
-     {                                 \
-       if (glthread_lock_lock (&NAME)) \
-         abort ();                     \
-     }                                 \
-   while (0)
-#define gl_lock_unlock(NAME) \
-   do                                    \
-     {                                   \
-       if (glthread_lock_unlock (&NAME)) \
-         abort ();                       \
-     }                                   \
-   while (0)
-#define gl_lock_destroy(NAME) \
-   do                                     \
-     {                                    \
-       if (glthread_lock_destroy (&NAME)) \
-         abort ();                        \
-     }                                    \
-   while (0)
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-#define gl_rwlock_init(NAME) \
-   do                                    \
-     {                                   \
-       if (glthread_rwlock_init (&NAME)) \
-         abort ();                       \
-     }                                   \
-   while (0)
-#define gl_rwlock_rdlock(NAME) \
-   do                                      \
-     {                                     \
-       if (glthread_rwlock_rdlock (&NAME)) \
-         abort ();                         \
-     }                                     \
-   while (0)
-#define gl_rwlock_wrlock(NAME) \
-   do                                      \
-     {                                     \
-       if (glthread_rwlock_wrlock (&NAME)) \
-         abort ();                         \
-     }                                     \
-   while (0)
-#define gl_rwlock_unlock(NAME) \
-   do                                      \
-     {                                     \
-       if (glthread_rwlock_unlock (&NAME)) \
-         abort ();                         \
-     }                                     \
-   while (0)
-#define gl_rwlock_destroy(NAME) \
-   do                                       \
-     {                                      \
-       if (glthread_rwlock_destroy (&NAME)) \
-         abort ();                          \
-     }                                      \
-   while (0)
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-#define gl_recursive_lock_init(NAME) \
-   do                                            \
-     {                                           \
-       if (glthread_recursive_lock_init (&NAME)) \
-         abort ();                               \
-     }                                           \
-   while (0)
-#define gl_recursive_lock_lock(NAME) \
-   do                                            \
-     {                                           \
-       if (glthread_recursive_lock_lock (&NAME)) \
-         abort ();                               \
-     }                                           \
-   while (0)
-#define gl_recursive_lock_unlock(NAME) \
-   do                                              \
-     {                                             \
-       if (glthread_recursive_lock_unlock (&NAME)) \
-         abort ();                                 \
-     }                                             \
-   while (0)
-#define gl_recursive_lock_destroy(NAME) \
-   do                                               \
-     {                                              \
-       if (glthread_recursive_lock_destroy (&NAME)) \
-         abort ();                                  \
-     }                                              \
-   while (0)
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-#define gl_once(NAME, INITFUNCTION) \
-   do                                           \
-     {                                          \
-       if (glthread_once (&NAME, INITFUNCTION)) \
-         abort ();                              \
-     }                                          \
-   while (0)
-
-/* ========================================================================= */
-
-#endif /* _LOCK_H */
--- a/lib/glthread/threadlib.c
+++ b/lib/glthread/threadlib.c
@ -1,73 +0,0 @@
-/* Multithreading primitives.
-   Copyright (C) 2005-2019 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
-
-/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
-
-#include <config.h>
-
-/* ========================================================================= */
-
-#if USE_POSIX_THREADS
-
-/* Use the POSIX threads library.  */
-
-# include <pthread.h>
-# include <stdlib.h>
-
-# if PTHREAD_IN_USE_DETECTION_HARD
-
-/* The function to be executed by a dummy thread.  */
-static void *
-dummy_thread_func (void *arg)
-{
-  return arg;
-}
-
-int
-glthread_in_use (void)
-{
-  static int tested;
-  static int result; /* 1: linked with -lpthread, 0: only with libc */
-
-  if (!tested)
-    {
-      pthread_t thread;
-
-      if (pthread_create (&thread, NULL, dummy_thread_func, NULL) != 0)
-        /* Thread creation failed.  */
-        result = 0;
-      else
-        {
-          /* Thread creation works.  */
-          void *retval;
-          if (pthread_join (thread, &retval) != 0)
-            abort ();
-          result = 1;
-        }
-      tested = 1;
-    }
-  return result;
-}
-
-# endif
-
-#endif
-
-/* ========================================================================= */
-
-/* This declaration is solely to ensure that after preprocessing
-   this file is never empty.  */
-typedef int dummy;
--- a/lib/hard-locale.c
+++ b/lib/hard-locale.c
@ -1,6 +1,6 @@
 /* hard-locale.c -- Determine whether a locale is hard.

-   Copyright (C) 1997-1999, 2002-2004, 2006-2007, 2009-2019 Free Software
+   Copyright (C) 1997-1999, 2002-2004, 2006-2007, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@ -21,52 +21,15 @@
 #include "hard-locale.h"

 #include <locale.h>
-#include <stdlib.h>
 #include <string.h>

-#ifdef __GLIBC__
-# define GLIBC_VERSION __GLIBC__
-#elif defined __UCLIBC__
-# define GLIBC_VERSION 2
-#else
-# define GLIBC_VERSION 0
-#endif
-
-/* Return true if the current CATEGORY locale is hard, i.e. if you
-   can't get away with assuming traditional C or POSIX behavior.  */
 bool
 hard_locale (int category)
 {
-  bool hard = true;
-  char const *p = setlocale (category, NULL);
+  char locale[SETLOCALE_NULL_MAX];

-  if (p)
-    {
-      if (2 <= GLIBC_VERSION)
-        {
-          if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0)
-            hard = false;
-        }
-      else
-        {
-          char *locale = strdup (p);
-          if (locale)
-            {
-              /* Temporarily set the locale to the "C" and "POSIX" locales
-                 to find their names, so that we can determine whether one
-                 or the other is the caller's locale.  */
-              if (((p = setlocale (category, "C"))
-                   && strcmp (p, locale) == 0)
-                  || ((p = setlocale (category, "POSIX"))
-                      && strcmp (p, locale) == 0))
-                hard = false;
+  if (setlocale_null_r (category, locale, sizeof (locale)))
+    return false;

-              /* Restore the caller's locale.  */
-              setlocale (category, locale);
-              free (locale);
-            }
-        }
-    }
-
-  return hard;
+  return !(strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0);
 }
--- a/lib/hard-locale.h
+++ b/lib/hard-locale.h
@ -1,6 +1,6 @@
 /* Determine whether a locale is hard.

-   Copyright (C) 1999, 2003-2004, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2003-2004, 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@ -20,6 +20,9 @@

 # include <stdbool.h>

-bool hard_locale (int);
+/* Return true if the specified CATEGORY of the current locale is hard, i.e.
+   different from the C or POSIX locale that has a fixed behavior.
+   CATEGORY must be one of the LC_* values, but not LC_ALL.  */
+extern bool hard_locale (int category);

 #endif /* HARD_LOCALE_H_ */
--- a/lib/intprops.h
+++ b/lib/intprops.h
@ -1,6 +1,6 @@
 /* intprops.h -- properties of integer types

-   Copyright (C) 2001-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published
@ -22,19 +22,6 @@

 #include <limits.h>

-/* If the compiler lacks __has_builtin, define it well enough for this
-   source file only.  */
-#ifndef __has_builtin
-# define __has_builtin(x) _GL_HAS_##x
-# if 5 <= __GNUC__ && !defined __ICC
-#  define _GL_HAS___builtin_add_overflow 1
-# else
-#  define _GL_HAS___builtin_add_overflow 0
-# endif
-# define _GL_HAS___builtin_mul_overflow _GL_HAS___builtin_add_overflow
-# define _GL_TEMPDEF___has_builtin
-#endif
-
 /* Return a value with the common real type of E and V and the value of V.
   Do not evaluate E.  */
 #define _GL_INT_CONVERT(e, v) ((1 ? 0 : (e)) + (v))
@ -235,19 +222,20 @@

 /* True if __builtin_add_overflow (A, B, P) and __builtin_sub_overflow
   (A, B, P) work when P is non-null.  */
-#if __has_builtin (__builtin_add_overflow)
+#if 5 <= __GNUC__ && !defined __ICC
 # define _GL_HAS_BUILTIN_ADD_OVERFLOW 1
+#elif defined __has_builtin
+# define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
 #else
 # define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
 #endif

-/* True if __builtin_mul_overflow (A, B, P) works when P is non-null.
-   Work around Clang bug <https://bugs.llvm.org/show_bug.cgi?id=16404>.  */
-#if (__has_builtin (__builtin_mul_overflow) \
-     && (!defined __clang__ || (defined __APPLE__ && defined __MACH__)))
-# define _GL_HAS_BUILTIN_MUL_OVERFLOW 1
-#else
+/* True if __builtin_mul_overflow (A, B, P) works when P is non-null.  */
+#ifdef __clang__
+/* Work around Clang bug <https://bugs.llvm.org/show_bug.cgi?id=16404>.  */
 # define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
+#else
+# define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW
 #endif

 /* True if __builtin_add_overflow_p (A, B, C) works, and similarly for
@ -385,12 +373,17 @@
   _GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
 #endif
 #if _GL_HAS_BUILTIN_MUL_OVERFLOW
-/* Work around GCC bug 91450.  */
-# define INT_MULTIPLY_WRAPV(a, b, r) \
-   ((!_GL_SIGNED_TYPE_OR_EXPR (*(r)) && EXPR_SIGNED (a) && EXPR_SIGNED (b) \
-     && _GL_INT_MULTIPLY_RANGE_OVERFLOW (a, b, 0, (__typeof__ (*(r))) -1)) \
-    ? ((void) __builtin_mul_overflow (a, b, r), 1) \
-    : __builtin_mul_overflow (a, b, r))
+# if (9 < __GNUC__ + (3 <= __GNUC_MINOR__) \
+      || (__GNUC__ == 8 && 4 <= __GNUC_MINOR__))
+#  define INT_MULTIPLY_WRAPV(a, b, r) __builtin_mul_overflow (a, b, r)
+# else
+   /* Work around GCC bug 91450.  */
+#  define INT_MULTIPLY_WRAPV(a, b, r) \
+    ((!_GL_SIGNED_TYPE_OR_EXPR (*(r)) && EXPR_SIGNED (a) && EXPR_SIGNED (b) \
+      && _GL_INT_MULTIPLY_RANGE_OVERFLOW (a, b, 0, (__typeof__ (*(r))) -1)) \
+     ? ((void) __builtin_mul_overflow (a, b, r), 1) \
+     : __builtin_mul_overflow (a, b, r))
+# endif
 #else
 # define INT_MULTIPLY_WRAPV(a, b, r) \
   _GL_INT_OP_WRAPV (a, b, r, *, _GL_INT_MULTIPLY_RANGE_OVERFLOW)
@ -588,11 +581,4 @@
         : (tmin) / (a) < (b)) \
      : (tmax) / (b) < (a)))

-#ifdef _GL_TEMPDEF___has_builtin
-# undef __has_builtin
-# undef _GL_HAS___builtin_add_overflow
-# undef _GL_HAS___builtin_mul_overflow
-# undef _GL_TEMPDEF___has_builtin
-#endif
-
 #endif /* _GL_INTPROPS_H */
--- a/lib/inttypes.in.h
+++ b/lib/inttypes.in.h
--- a/lib/isatty.c
+++ b/lib/isatty.c
@ -1,5 +1,5 @@
 /* isatty() replacement.
-   Copyright (C) 2012-2019 Free Software Foundation, Inc.
+   Copyright (C) 2012-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/itold.c
+++ b/lib/itold.c
@ -1,5 +1,5 @@
 /* Replacement for 'int' to 'long double' conversion routine.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2011.

   This program is free software: you can redistribute it and/or modify
--- a/lib/lc-charset-dispatch.c
+++ b/lib/lc-charset-dispatch.c
@ -0,0 +1,82 @@
+/* Dispatching based on the current locale's character encoding.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "lc-charset-dispatch.h"
+
+#if GNULIB_defined_mbstate_t
+
+# include "localcharset.h"
+# include "streq.h"
+
+# if GNULIB_WCHAR_SINGLE
+/* When we know that the locale does not change, provide a speedup by
+   caching the value of locale_encoding_classification.  */
+#  define locale_encoding_classification_cached locale_encoding_classification
+# else
+/* By default, don't make assumptions, hence no caching.  */
+#  define locale_encoding_classification_uncached locale_encoding_classification
+# endif
+
+# if GNULIB_WCHAR_SINGLE
+static inline
+# endif
+enc_t
+locale_encoding_classification_uncached (void)
+{
+  const char *encoding = locale_charset ();
+  if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
+    return enc_utf8;
+  if (STREQ_OPT (encoding, "EUC-JP", 'E', 'U', 'C', '-', 'J', 'P', 0, 0, 0))
+    return enc_eucjp;
+  if (STREQ_OPT (encoding, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
+      || STREQ_OPT (encoding, "GB2312", 'G', 'B', '2', '3', '1', '2', 0, 0, 0)
+      || STREQ_OPT (encoding, "BIG5", 'B', 'I', 'G', '5', 0, 0, 0, 0, 0))
+    return enc_94;
+  if (STREQ_OPT (encoding, "EUC-TW", 'E', 'U', 'C', '-', 'T', 'W', 0, 0, 0))
+    return enc_euctw;
+  if (STREQ_OPT (encoding, "GB18030", 'G', 'B', '1', '8', '0', '3', '0', 0, 0))
+    return enc_gb18030;
+  if (STREQ_OPT (encoding, "SJIS", 'S', 'J', 'I', 'S', 0, 0, 0, 0, 0))
+    return enc_sjis;
+  return enc_other;
+}
+
+# if GNULIB_WCHAR_SINGLE
+
+static int cached_locale_enc = -1;
+
+enc_t
+locale_encoding_classification_cached (void)
+{
+  if (cached_locale_enc < 0)
+    cached_locale_enc = locale_encoding_classification_uncached ();
+  return cached_locale_enc;
+}
+
+# endif
+
+#else
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#endif
--- a/lib/lc-charset-dispatch.h
+++ b/lib/lc-charset-dispatch.h
@ -0,0 +1,40 @@
+/* Dispatching based on the current locale's character encoding.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <wchar.h>
+
+#if GNULIB_defined_mbstate_t
+
+/* A classification of special values of the encoding of the current locale.  */
+typedef enum
+  {
+    enc_other,      /* other */
+    enc_utf8,       /* UTF-8 */
+    enc_eucjp,      /* EUC-JP */
+    enc_94,         /* EUC-KR, GB2312, BIG5 */
+    enc_euctw,      /* EUC-TW */
+    enc_gb18030,    /* GB18030 */
+    enc_sjis        /* SJIS */
+  }
+  enc_t;
+
+/* Returns a classification of special values of the encoding of the current
+   locale.  */
+extern enc_t locale_encoding_classification (void);
+
+#endif
--- a/lib/libc-config.h
+++ b/lib/libc-config.h
@ -1,6 +1,6 @@
 /* System definitions for code taken from the GNU C Library

-   Copyright 2017-2019 Free Software Foundation, Inc.
+   Copyright 2017-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public
@ -55,8 +55,17 @@

 #ifndef __glibc_clang_prereq
 # if defined __clang_major__ && defined __clang_minor__
-#  define __glibc_clang_prereq(maj, min) \
-     ((maj) < __clang_major__ + ((min) <= __clang_minor__))
+#  ifdef __apple_build_version__
+/* Apple for some reason renumbers __clang_major__ and __clang_minor__.
+   Gnulib code uses only __glibc_clang_prereq (3, 5); map it to
+   6000000 <= __apple_build_version__.  Support for other calls to
+   __glibc_clang_prereq can be added here as needed.  */
+#   define __glibc_clang_prereq(maj, min) \
+      ((maj) == 3 && (min) == 5 ? 6000000 <= __apple_build_version__ : 0)
+#  else
+#   define __glibc_clang_prereq(maj, min) \
+      ((maj) < __clang_major__ + ((min) <= __clang_minor__))
+#  endif
 # else
 #  define __glibc_clang_prereq(maj, min) 0
 # endif
--- a/lib/limits.in.h
+++ b/lib/limits.in.h
@ -1,6 +1,6 @@
 /* A GNU-like <limits.h>.

-   Copyright 2016-2019 Free Software Foundation, Inc.
+   Copyright 2016-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
--- a/lib/localcharset.c
+++ b/lib/localcharset.c
@ -1,6 +1,6 @@
 /* Determine a canonical name for the current locale's character encoding.

-   Copyright (C) 2000-2006, 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 2000-2006, 2008-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@ -58,6 +58,9 @@
 #elif defined WINDOWS_NATIVE
 # define WIN32_LEAN_AND_MEAN
 # include <windows.h>
+  /* For the use of setlocale() below, the Gnulib override in setlocale.c is
+     not needed; see the platform lists in setlocale_null.m4.  */
+# undef setlocale
 #endif
 #if defined OS2
 # define INCL_DOS
@ -150,7 +153,8 @@ static const struct table_entry alias_table[] =
    { "ISO8859-2",  "ISO-8859-2" },
    { "ISO8859-4",  "ISO-8859-4" },
    { "ISO8859-5",  "ISO-8859-5" },
-    { "ISO8859-7",  "ISO-8859-7" }
+    { "ISO8859-7",  "ISO-8859-7" },
+    { "US-ASCII",   "ASCII" }
 #   define alias_table_defined
 #  endif
 #  if defined __APPLE__ && defined __MACH__                 /* Mac OS X */
@ -378,8 +382,6 @@ static const struct table_entry alias_table[] =
       by Alex Taylor:
       <http://altsan.org/os2/toolkits/uls/index.html#codepages>.
       See also "__convcp() of kLIBC":
-       <http://trac.netlabs.org/libc/browser/branches/libc-0.6/src/emx/src/lib/locale/__convcp.c>,
-       or:
       <https://github.com/bitwiseworks/libc/blob/master/src/emx/src/lib/locale/__convcp.c>.  */
    { "CP1004",        "CP1252" },
  /*{ "CP1041",        "CP943" },*/
@ -814,8 +816,11 @@ static const struct table_entry locale_table[] =


 /* Determine the current locale's character encoding, and canonicalize it
-   into one of the canonical names listed in localcharset.h.
-   The result must not be freed; it is statically allocated.
+   into one of the canonical names listed below.
+   The result must not be freed; it is statically allocated.  The result
+   becomes invalid when setlocale() is used to change the global locale, or
+   when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG
+   is changed; threads in multithreaded programs should not do this.
   If the canonical name cannot be determined, the result is a non-canonical
   name.  */

@ -827,6 +832,13 @@ locale_charset (void)
 {
  const char *codeset;

+  /* This function must be multithread-safe.  To achieve this without using
+     thread-local storage, we use a simple strcpy or memcpy to fill this static
+     buffer.  Filling it through, for example, strcpy + strcat would not be
+     guaranteed to leave the buffer's contents intact if another thread is
+     currently accessing it.  If necessary, the contents is first assembled in
+     a stack-allocated buffer.  */
+
 #if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2

 # if HAVE_LANGINFO_CODESET
@ -841,7 +853,7 @@ locale_charset (void)
  if (codeset != NULL && strcmp (codeset, "US-ASCII") == 0)
    {
      const char *locale;
-      static char buf[2 + 10 + 1];
+      static char resultbuf[2 + 10 + 1];

      locale = getenv ("LC_ALL");
      if (locale == NULL || locale[0] == '\0')
@ -865,11 +877,12 @@ locale_charset (void)
              modifier = strchr (dot, '@');
              if (modifier == NULL)
                return dot;
-              if (modifier - dot < sizeof (buf))
+              if (modifier - dot < sizeof (resultbuf))
                {
-                  memcpy (buf, dot, modifier - dot);
-                  buf [modifier - dot] = '\0';
-                  return buf;
+                  /* This way of filling resultbuf is multithread-safe.  */
+                  memcpy (resultbuf, dot, modifier - dot);
+                  resultbuf [modifier - dot] = '\0';
+                  return resultbuf;
                }
            }
        }
@ -885,8 +898,13 @@ locale_charset (void)
         converting to GetConsoleOutputCP().  This leads to correct results,
         except when SetConsoleOutputCP has been called and a raster font is
         in use.  */
-      sprintf (buf, "CP%u", GetACP ());
-      codeset = buf;
+      {
+        char buf[2 + 10 + 1];
+
+        sprintf (buf, "CP%u", GetACP ());
+        strcpy (resultbuf, buf);
+        codeset = resultbuf;
+      }
    }
 #  endif

@ -896,34 +914,28 @@ locale_charset (void)

 # elif defined WINDOWS_NATIVE

-  static char buf[2 + 10 + 1];
+  char buf[2 + 10 + 1];
+  static char resultbuf[2 + 10 + 1];

  /* The Windows API has a function returning the locale's codepage as
     a number, but the value doesn't change according to what the
     'setlocale' call specified.  So we use it as a last resort, in
     case the string returned by 'setlocale' doesn't specify the
     codepage.  */
-  char *current_locale = setlocale (LC_ALL, NULL);
-  char *pdot;
+  char *current_locale = setlocale (LC_CTYPE, NULL);
+  char *pdot = strrchr (current_locale, '.');

-  /* If they set different locales for different categories,
-     'setlocale' will return a semi-colon separated list of locale
-     values.  To make sure we use the correct one, we choose LC_CTYPE.  */
-  if (strchr (current_locale, ';'))
-    current_locale = setlocale (LC_CTYPE, NULL);
-
-  pdot = strrchr (current_locale, '.');
  if (pdot && 2 + strlen (pdot + 1) + 1 <= sizeof (buf))
    sprintf (buf, "CP%s", pdot + 1);
  else
    {
      /* The Windows API has a function returning the locale's codepage as a
-        number: GetACP().
-        When the output goes to a console window, it needs to be provided in
-        GetOEMCP() encoding if the console is using a raster font, or in
-        GetConsoleOutputCP() encoding if it is using a TrueType font.
-        But in GUI programs and for output sent to files and pipes, GetACP()
-        encoding is the best bet.  */
+         number: GetACP().
+         When the output goes to a console window, it needs to be provided in
+         GetOEMCP() encoding if the console is using a raster font, or in
+         GetConsoleOutputCP() encoding if it is using a TrueType font.
+         But in GUI programs and for output sent to files and pipes, GetACP()
+         encoding is the best bet.  */
      sprintf (buf, "CP%u", GetACP ());
    }
  /* For a locale name such as "French_France.65001", in Windows 10,
@ -931,12 +943,15 @@ locale_charset (void)
  if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0)
    codeset = "UTF-8";
  else
-    codeset = buf;
+    {
+      strcpy (resultbuf, buf);
+      codeset = resultbuf;
+    }

 # elif defined OS2

  const char *locale;
-  static char buf[2 + 10 + 1];
+  static char resultbuf[2 + 10 + 1];
  ULONG cp[3];
  ULONG cplen;

@ -965,11 +980,12 @@ locale_charset (void)
          modifier = strchr (dot, '@');
          if (modifier == NULL)
            return dot;
-          if (modifier - dot < sizeof (buf))
+          if (modifier - dot < sizeof (resultbuf))
            {
-              memcpy (buf, dot, modifier - dot);
-              buf [modifier - dot] = '\0';
-              return buf;
+              /* This way of filling resultbuf is multithread-safe.  */
+              memcpy (resultbuf, dot, modifier - dot);
+              resultbuf [modifier - dot] = '\0';
+              return resultbuf;
            }
        }

@ -985,8 +1001,11 @@ locale_charset (void)
        codeset = "";
      else
        {
+          char buf[2 + 10 + 1];
+
          sprintf (buf, "CP%u", cp[0]);
-          codeset = buf;
+          strcpy (resultbuf, buf);
+          codeset = resultbuf;
        }
    }

--- a/lib/localcharset.h
+++ b/lib/localcharset.h
@ -1,5 +1,5 @@
 /* Determine a canonical name for the current locale's character encoding.
-   Copyright (C) 2000-2003, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2000-2003, 2009-2020 Free Software Foundation, Inc.
   This file is part of the GNU CHARSET Library.

   This program is free software; you can redistribute it and/or modify
@ -26,7 +26,10 @@ extern "C" {

 /* Determine the current locale's character encoding, and canonicalize it
   into one of the canonical names listed below.
-   The result must not be freed; it is statically allocated.
+   The result must not be freed; it is statically allocated.  The result
+   becomes invalid when setlocale() is used to change the global locale, or
+   when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG
+   is changed; threads in multithreaded programs should not do this.
   If the canonical name cannot be determined, the result is a non-canonical
   name.  */
 extern const char * locale_charset (void);
@ -45,15 +48,15 @@ extern const char * locale_charset (void);
                                    (darwin = Mac OS X, windows = native Windows)

   ASCII, ANSI_X3.4-1968       glibc solaris freebsd netbsd darwin minix cygwin
-   ISO-8859-1              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin
-   ISO-8859-2              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin
+   ISO-8859-1              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-2              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
   ISO-8859-3              Y   glibc solaris cygwin
   ISO-8859-4              Y   hpux osf solaris freebsd netbsd openbsd darwin
-   ISO-8859-5              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin
+   ISO-8859-5              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
   ISO-8859-6              Y   glibc aix hpux solaris cygwin
-   ISO-8859-7              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin
-   ISO-8859-8              Y   glibc aix hpux osf solaris cygwin
-   ISO-8859-9              Y   glibc aix hpux irix osf solaris freebsd darwin cygwin
+   ISO-8859-7              Y   glibc aix hpux irix osf solaris freebsd netbsd openbsd darwin cygwin zos
+   ISO-8859-8              Y   glibc aix hpux osf solaris cygwin zos
+   ISO-8859-9              Y   glibc aix hpux irix osf solaris freebsd darwin cygwin zos
   ISO-8859-13                 glibc hpux solaris freebsd netbsd openbsd darwin cygwin
   ISO-8859-14                 glibc cygwin
   ISO-8859-15                 glibc aix irix osf solaris freebsd netbsd openbsd darwin cygwin
@ -76,7 +79,7 @@ extern const char * locale_charset (void);
   CP874                       windows dos
   CP922                       aix
   CP932                       aix cygwin windows dos
-   CP943                       aix
+   CP943                       aix zos
   CP949                       osf darwin windows dos
   CP950                       windows dos
   CP1046                      aix
@ -92,17 +95,17 @@ extern const char * locale_charset (void);
   CP1255                      glibc windows
   CP1256                      windows
   CP1257                      windows
-   GB2312                  Y   glibc aix hpux irix solaris freebsd netbsd darwin cygwin
+   GB2312                  Y   glibc aix hpux irix solaris freebsd netbsd darwin cygwin zos
   EUC-JP                  Y   glibc aix hpux irix osf solaris freebsd netbsd darwin cygwin
-   EUC-KR                  Y   glibc aix hpux irix osf solaris freebsd netbsd darwin cygwin
+   EUC-KR                  Y   glibc aix hpux irix osf solaris freebsd netbsd darwin cygwin zos
   EUC-TW                      glibc aix hpux irix osf solaris netbsd
-   BIG5                    Y   glibc aix hpux osf solaris freebsd netbsd darwin cygwin
+   BIG5                    Y   glibc aix hpux osf solaris freebsd netbsd darwin cygwin zos
   BIG5-HKSCS                  glibc hpux solaris netbsd darwin
   GBK                         glibc aix osf solaris freebsd darwin cygwin windows dos
   GB18030                     glibc hpux solaris freebsd netbsd darwin
   SHIFT_JIS               Y   hpux osf solaris freebsd netbsd darwin
   JOHAB                       glibc solaris windows
-   TIS-620                     glibc aix hpux osf solaris cygwin
+   TIS-620                     glibc aix hpux osf solaris cygwin zos
   VISCII                  Y   glibc
   TCVN5712-1                  glibc
   ARMSCII-8                   glibc freebsd netbsd darwin
@ -116,7 +119,7 @@ extern const char * locale_charset (void);
   HP-KANA8                    hpux
   DEC-KANJI                   osf
   DEC-HANYU                   osf
-   UTF-8                   Y   glibc aix hpux osf solaris netbsd darwin cygwin
+   UTF-8                   Y   glibc aix hpux osf solaris netbsd darwin cygwin zos

   Note: Names which are not marked as being a MIME name should not be used in
   Internet protocols for information interchange (mail, news, etc.).
--- a/lib/locale.in.h
+++ b/lib/locale.in.h
@ -0,0 +1,305 @@
+/* A POSIX <locale.h>.
+   Copyright (C) 2007-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if (defined _WIN32 && !defined __CYGWIN__ && defined __need_locale_t) \
+    || defined _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* Special invocation convention:
+   - Inside mingw header files,
+   - To handle Solaris header files (through Solaris 10) when combined
+     with gettext's libintl.h.  */
+
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+
+#define _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#undef _GL_ALREADY_INCLUDING_LOCALE_H
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+#define _@GUARD_PREFIX@_LOCALE_H
+
+/* NetBSD 5.0 mis-defines NULL.  */
+#include <stddef.h>
+
+/* Mac OS X 10.5 defines the locale_t type in <xlocale.h>.  */
+#if @HAVE_XLOCALE_H@
+# include <xlocale.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* The LC_MESSAGES locale category is specified in POSIX, but not in ISO C.
+   On systems that don't define it, use the same value as GNU libintl.  */
+#if !defined LC_MESSAGES
+# define LC_MESSAGES 1729
+#endif
+
+/* On native Windows with MSVC, 'struct lconv' lacks the members int_p_* and
+   int_n_*.  Instead of overriding 'struct lconv', merely define these member
+   names as macros.  This avoids trouble in C++ mode.  */
+#if defined _MSC_VER
+# define int_p_cs_precedes   p_cs_precedes
+# define int_p_sign_posn     p_sign_posn
+# define int_p_sep_by_space  p_sep_by_space
+# define int_n_cs_precedes   n_cs_precedes
+# define int_n_sign_posn     n_sign_posn
+# define int_n_sep_by_space  n_sep_by_space
+#endif
+
+/* Bionic libc's 'struct lconv' is just a dummy.  */
+#if @REPLACE_STRUCT_LCONV@
+# define lconv rpl_lconv
+struct lconv
+{
+  /* All 'char *' are actually 'const char *'.  */
+
+  /* Members that depend on the LC_NUMERIC category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_04> */
+
+  /* Symbol used as decimal point.  */
+  char *decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *grouping;
+
+  /* Members that depend on the LC_MONETARY category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_03> */
+
+  /* Symbol used as decimal point.  */
+  char *mon_decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *mon_thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *mon_grouping;
+  /* Sign used to indicate a value >= 0.  */
+  char *positive_sign;
+  /* Sign used to indicate a value < 0.  */
+  char *negative_sign;
+
+  /* For formatting local currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *currency_symbol;
+  /* Number of digits after the decimal point.  */
+  char frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char n_sep_by_space;
+
+  /* For formatting international currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *int_curr_symbol;
+  /* Number of digits after the decimal point.  */
+  char int_frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char int_p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char int_n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_n_sep_by_space;
+};
+#endif
+
+#if @GNULIB_LOCALECONV@
+# if @REPLACE_LOCALECONV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef localeconv
+#   define localeconv rpl_localeconv
+#  endif
+_GL_FUNCDECL_RPL (localeconv, struct lconv *, (void));
+_GL_CXXALIAS_RPL (localeconv, struct lconv *, (void));
+# else
+_GL_CXXALIAS_SYS (localeconv, struct lconv *, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (localeconv);
+# endif
+#elif @REPLACE_STRUCT_LCONV@
+# undef localeconv
+# define localeconv localeconv_used_without_requesting_gnulib_module_localeconv
+#elif defined GNULIB_POSIXCHECK
+# undef localeconv
+# if HAVE_RAW_DECL_LOCALECONV
+_GL_WARN_ON_USE (localeconv,
+                 "localeconv returns too few information on some platforms - "
+                 "use gnulib module localeconv for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE@
+# if @REPLACE_SETLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setlocale
+#   define setlocale rpl_setlocale
+#   define GNULIB_defined_setlocale 1
+#  endif
+_GL_FUNCDECL_RPL (setlocale, char *, (int category, const char *locale));
+_GL_CXXALIAS_RPL (setlocale, char *, (int category, const char *locale));
+# else
+_GL_CXXALIAS_SYS (setlocale, char *, (int category, const char *locale));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (setlocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef setlocale
+# if HAVE_RAW_DECL_SETLOCALE
+_GL_WARN_ON_USE (setlocale, "setlocale works differently on native Windows - "
+                 "use gnulib module setlocale for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE_NULL@
+/* Included here for convenience.  */
+# include "setlocale_null.h"
+#endif
+
+#if /*@GNULIB_NEWLOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @HAVE_NEWLOCALE@)
+# if @REPLACE_NEWLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef newlocale
+#   define newlocale rpl_newlocale
+#   define GNULIB_defined_newlocale 1
+#  endif
+_GL_FUNCDECL_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+# else
+#  if @HAVE_NEWLOCALE@
+_GL_CXXALIAS_SYS (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+#  endif
+# endif
+# if @HAVE_NEWLOCALE@
+_GL_CXXALIASWARN (newlocale);
+# endif
+# if @HAVE_NEWLOCALE@ || @REPLACE_NEWLOCALE@
+#  ifndef HAVE_WORKING_NEWLOCALE
+#   define HAVE_WORKING_NEWLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef newlocale
+# if HAVE_RAW_DECL_NEWLOCALE
+_GL_WARN_ON_USE (newlocale, "newlocale is not portable");
+# endif
+#endif
+
+#if @GNULIB_DUPLOCALE@ || (@GNULIB_LOCALENAME@ && @HAVE_DUPLOCALE@)
+# if @REPLACE_DUPLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef duplocale
+#   define duplocale rpl_duplocale
+#   define GNULIB_defined_duplocale 1
+#  endif
+_GL_FUNCDECL_RPL (duplocale, locale_t, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (duplocale, locale_t, (locale_t locale));
+# else
+#  if @HAVE_DUPLOCALE@
+_GL_CXXALIAS_SYS (duplocale, locale_t, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_DUPLOCALE@
+_GL_CXXALIASWARN (duplocale);
+# endif
+# if @HAVE_DUPLOCALE@ || @REPLACE_DUPLOCALE@
+#  ifndef HAVE_WORKING_DUPLOCALE
+#   define HAVE_WORKING_DUPLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef duplocale
+# if HAVE_RAW_DECL_DUPLOCALE
+_GL_WARN_ON_USE (duplocale, "duplocale is buggy on some glibc systems - "
+                 "use gnulib module duplocale for portability");
+# endif
+#endif
+
+#if /*@GNULIB_FREELOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @HAVE_FREELOCALE@)
+# if @REPLACE_FREELOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef freelocale
+#   define freelocale rpl_freelocale
+#   define GNULIB_defined_freelocale 1
+#  endif
+_GL_FUNCDECL_RPL (freelocale, void, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (freelocale, void, (locale_t locale));
+# else
+#  if @HAVE_FREELOCALE@
+/* Need to cast, because on FreeBSD and Mac OS X 10.13, the return type is
+                                   int.  */
+_GL_CXXALIAS_SYS_CAST (freelocale, void, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_FREELOCALE@
+_GL_CXXALIASWARN (freelocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef freelocale
+# if HAVE_RAW_DECL_FREELOCALE
+_GL_WARN_ON_USE (freelocale, "freelocale is not portable");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* !(__need_locale_t || _GL_ALREADY_INCLUDING_LOCALE_H) */
--- a/lib/localtime-buffer.c
+++ b/lib/localtime-buffer.c
@ -1,6 +1,6 @@
 /* Provide access to the last buffer returned by localtime() or gmtime().

-   Copyright (C) 2001-2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/localtime-buffer.h
+++ b/lib/localtime-buffer.h
@ -1,6 +1,6 @@
 /* Provide access to the last buffer returned by localtime() or gmtime().

-   Copyright (C) 2001-2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001-2003, 2005-2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/lstat.c
+++ b/lib/lstat.c
@ -1,6 +1,6 @@
 /* Work around a bug of lstat on some systems

-   Copyright (C) 1997-2006, 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2006, 2008-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/malloc.c
+++ b/lib/malloc.c
@ -1,6 +1,6 @@
 /* malloc() function that is glibc compatible.

-   Copyright (C) 1997-1998, 2006-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-1998, 2006-2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/malloca.c
+++ b/lib/malloca.c
@ -1,5 +1,5 @@
 /* Safe automatic memory allocation.
-   Copyright (C) 2003, 2006-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2006-2007, 2009-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2003, 2018.

   This program is free software; you can redistribute it and/or modify
--- a/lib/malloca.h
+++ b/lib/malloca.h
@ -1,5 +1,5 @@
 /* Safe automatic memory allocation.
-   Copyright (C) 2003-2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2003-2007, 2009-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2003.

   This program is free software; you can redistribute it and/or modify
@ -112,14 +112,10 @@ enum
   among all elementary types.  */
  sa_alignment_long = sa_alignof (long),
  sa_alignment_double = sa_alignof (double),
-#if HAVE_LONG_LONG_INT
  sa_alignment_longlong = sa_alignof (long long),
-#endif
  sa_alignment_longdouble = sa_alignof (long double),
  sa_alignment_max = ((sa_alignment_long - 1) | (sa_alignment_double - 1)
-#if HAVE_LONG_LONG_INT
                      | (sa_alignment_longlong - 1)
-#endif
                      | (sa_alignment_longdouble - 1)
                     ) + 1
 };
--- a/lib/mbrtowc-impl-utf8.h
+++ b/lib/mbrtowc-impl-utf8.h
@ -0,0 +1,138 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 1999-2002, 2005-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+/* This file contains the part of the body of the mbrtowc and mbrtoc32 functions
+   that handles the special case of the UTF-8 encoding.  */
+
+        /* Cf. unistr/u8-mbtouc.c.  */
+        unsigned char c = (unsigned char) p[0];
+
+        if (c < 0x80)
+          {
+            if (pwc != NULL)
+              *pwc = c;
+            res = (c == 0 ? 0 : 1);
+            goto success;
+          }
+        if (c >= 0xc2)
+          {
+            if (c < 0xe0)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else /* m >= 2 */
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40)
+                      {
+                        if (pwc != NULL)
+                          *pwc = ((unsigned int) (c & 0x1f) << 6)
+                                 | (unsigned int) (c2 ^ 0x80);
+                        res = 2;
+                        goto success;
+                      }
+                  }
+              }
+            else if (c < 0xf0)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40
+                        && (c >= 0xe1 || c2 >= 0xa0)
+                        && (c != 0xed || c2 < 0xa0))
+                      {
+                        if (m == 2)
+                          goto incomplete;
+                        else /* m >= 3 */
+                          {
+                            unsigned char c3 = (unsigned char) p[2];
+
+                            if ((c3 ^ 0x80) < 0x40)
+                              {
+                                unsigned int wc =
+                                  (((unsigned int) (c & 0x0f) << 12)
+                                   | ((unsigned int) (c2 ^ 0x80) << 6)
+                                   | (unsigned int) (c3 ^ 0x80));
+
+                                if (FITS_IN_CHAR_TYPE (wc))
+                                  {
+                                    if (pwc != NULL)
+                                      *pwc = wc;
+                                    res = 3;
+                                    goto success;
+                                  }
+                              }
+                          }
+                      }
+                  }
+              }
+            else if (c <= 0xf4)
+              {
+                if (m == 1)
+                  goto incomplete;
+                else
+                  {
+                    unsigned char c2 = (unsigned char) p[1];
+
+                    if ((c2 ^ 0x80) < 0x40
+                        && (c >= 0xf1 || c2 >= 0x90)
+                        && (c < 0xf4 || (c == 0xf4 && c2 < 0x90)))
+                      {
+                        if (m == 2)
+                          goto incomplete;
+                        else
+                          {
+                            unsigned char c3 = (unsigned char) p[2];
+
+                            if ((c3 ^ 0x80) < 0x40)
+                              {
+                                if (m == 3)
+                                  goto incomplete;
+                                else /* m >= 4 */
+                                  {
+                                    unsigned char c4 = (unsigned char) p[3];
+
+                                    if ((c4 ^ 0x80) < 0x40)
+                                      {
+                                        unsigned int wc =
+                                          (((unsigned int) (c & 0x07) << 18)
+                                           | ((unsigned int) (c2 ^ 0x80) << 12)
+                                           | ((unsigned int) (c3 ^ 0x80) << 6)
+                                           | (unsigned int) (c4 ^ 0x80));
+
+                                        if (FITS_IN_CHAR_TYPE (wc))
+                                          {
+                                            if (pwc != NULL)
+                                              *pwc = wc;
+                                            res = 4;
+                                            goto success;
+                                          }
+                                      }
+                                  }
+                              }
+                          }
+                      }
+                  }
+              }
+          }
+        goto invalid;
--- a/lib/mbrtowc-impl.h
+++ b/lib/mbrtowc-impl.h
@ -0,0 +1,262 @@
+/* Convert multibyte character to wide character.
+   Copyright (C) 1999-2002, 2005-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+/* This file contains the body of the mbrtowc and mbrtoc32 functions,
+   when GNULIB_defined_mbstate_t is defined.  */
+
+  char *pstate = (char *)ps;
+
+  if (s == NULL)
+    {
+      pwc = NULL;
+      s = "";
+      n = 1;
+    }
+
+  if (n == 0)
+    return (size_t)(-2);
+
+  /* Here n > 0.  */
+
+  if (pstate == NULL)
+    pstate = internal_state;
+
+  {
+    size_t nstate = pstate[0];
+    char buf[4];
+    const char *p;
+    size_t m;
+    enc_t enc;
+    int res;
+
+    switch (nstate)
+      {
+      case 0:
+        p = s;
+        m = n;
+        break;
+      case 3:
+        buf[2] = pstate[3];
+        FALLTHROUGH;
+      case 2:
+        buf[1] = pstate[2];
+        FALLTHROUGH;
+      case 1:
+        buf[0] = pstate[1];
+        p = buf;
+        m = nstate;
+        buf[m++] = s[0];
+        if (n >= 2 && m < 4)
+          {
+            buf[m++] = s[1];
+            if (n >= 3 && m < 4)
+              buf[m++] = s[2];
+          }
+        break;
+      default:
+        errno = EINVAL;
+        return (size_t)(-1);
+      }
+
+    /* Here m > 0.  */
+
+    enc = locale_encoding_classification ();
+
+    if (enc == enc_utf8) /* UTF-8 */
+      {
+        /* Achieve
+             - multi-thread safety and
+             - the ability to produce wide character values > WCHAR_MAX
+           by not calling mbtowc() at all.  */
+#include "mbrtowc-impl-utf8.h"
+      }
+    else
+      {
+        /* The hidden internal state of mbtowc would make this function not
+           multi-thread safe.  Achieve multi-thread safety through a lock.  */
+        wchar_t wc;
+        res = mbtowc_with_lock (&wc, p, m);
+
+        if (res >= 0)
+          {
+            if ((wc == 0) != (res == 0))
+              abort ();
+            if (pwc != NULL)
+              *pwc = wc;
+            goto success;
+          }
+
+        /* mbtowc does not distinguish between invalid and incomplete multibyte
+           sequences.  But mbrtowc needs to make this distinction.
+           There are two possible approaches:
+             - Use iconv() and its return value.
+             - Use built-in knowledge about the possible encodings.
+           Given the low quality of implementation of iconv() on the systems
+           that lack mbrtowc(), we use the second approach.
+           The possible encodings are:
+             - 8-bit encodings,
+             - EUC-JP, EUC-KR, GB2312, EUC-TW, BIG5, GB18030, SJIS,
+             - UTF-8 (already handled above).
+           Use specialized code for each.  */
+        if (m >= 4 || m >= MB_CUR_MAX)
+          goto invalid;
+        /* Here MB_CUR_MAX > 1 and 0 < m < 4.  */
+        switch (enc)
+          {
+          /* As a reference for this code, you can use the GNU libiconv
+             implementation.  Look for uses of the RET_TOOFEW macro.  */
+
+          case enc_eucjp: /* EUC-JP */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e || c == 0x8f)
+                    goto incomplete;
+                }
+              if (m == 2)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c == 0x8f)
+                    {
+                      unsigned char c2 = (unsigned char) p[1];
+
+                      if (c2 >= 0xa1 && c2 < 0xff)
+                        goto incomplete;
+                    }
+                }
+              goto invalid;
+            }
+
+          case enc_94: /* EUC-KR, GB2312, BIG5 */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c >= 0xa1 && c < 0xff)
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          case enc_euctw: /* EUC-TW */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e)
+                    goto incomplete;
+                }
+              else /* m == 2 || m == 3 */
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c == 0x8e)
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          case enc_gb18030: /* GB18030 */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0x90 && c <= 0xe3) || (c >= 0xf8 && c <= 0xfe))
+                    goto incomplete;
+                }
+              else /* m == 2 || m == 3 */
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if (c >= 0x90 && c <= 0xe3)
+                    {
+                      unsigned char c2 = (unsigned char) p[1];
+
+                      if (c2 >= 0x30 && c2 <= 0x39)
+                        {
+                          if (m == 2)
+                            goto incomplete;
+                          else /* m == 3 */
+                            {
+                              unsigned char c3 = (unsigned char) p[2];
+
+                              if (c3 >= 0x81 && c3 <= 0xfe)
+                                goto incomplete;
+                            }
+                        }
+                    }
+                }
+              goto invalid;
+            }
+
+          case enc_sjis: /* SJIS */
+            {
+              if (m == 1)
+                {
+                  unsigned char c = (unsigned char) p[0];
+
+                  if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xea)
+                      || (c >= 0xf0 && c <= 0xf9))
+                    goto incomplete;
+                }
+              goto invalid;
+            }
+
+          default:
+            /* An unknown multibyte encoding.  */
+            goto incomplete;
+          }
+      }
+
+   success:
+    /* res >= 0 is the corrected return value of
+       mbtowc_with_lock (&wc, p, m).  */
+    if (nstate >= (res > 0 ? res : 1))
+      abort ();
+    res -= nstate;
+    pstate[0] = 0;
+    return res;
+
+   incomplete:
+    {
+      size_t k = nstate;
+      /* Here 0 <= k < m < 4.  */
+      pstate[++k] = s[0];
+      if (k < m)
+        {
+          pstate[++k] = s[1];
+          if (k < m)
+            pstate[++k] = s[2];
+        }
+      if (k != m)
+        abort ();
+    }
+    pstate[0] = m;
+    return (size_t)(-2);
+
+   invalid:
+    errno = EILSEQ;
+    /* The conversion state is undefined, says POSIX.  */
+    return (size_t)(-1);
+  }
--- a/lib/mbrtowc.c
+++ b/lib/mbrtowc.c
@ -1,5 +1,5 @@
 /* Convert multibyte character to wide character.
-   Copyright (C) 1999-2002, 2005-2019 Free Software Foundation, Inc.
+   Copyright (C) 1999-2002, 2005-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2008.

   This program is free software: you can redistribute it and/or modify
@ -20,21 +20,39 @@
 /* Specification.  */
 #include <wchar.h>

-#if C_LOCALE_MAYBE_EILSEQ
-# include "hard-locale.h"
-# include <locale.h>
-#endif
-
 #if GNULIB_defined_mbstate_t
-/* Implement mbrtowc() on top of mbtowc().  */
+/* Implement mbrtowc() on top of mbtowc() for the non-UTF-8 locales
+   and directly for the UTF-8 locales.  */

 # include <errno.h>
+# include <stdint.h>
 # include <stdlib.h>

-# include "localcharset.h"
-# include "streq.h"
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+#  if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
+#   include <threads.h>
+#   pragma weak thrd_exit
+#   define c11_threads_in_use() (thrd_exit != NULL)
+#  else
+#   define c11_threads_in_use() 0
+#  endif
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+
+# endif
+
 # include "verify.h"
-# include "glthread/lock.h"
+# include "lc-charset-dispatch.h"
+# include "mbtowc-lock.h"

 # ifndef FALLTHROUGH
 #  if __GNUC__ < 7
@ -44,417 +62,24 @@
 #  endif
 # endif

-/* Returns a classification of special values of the encoding of the current
-   locale.  */
-typedef enum {
-  enc_other,      /* other */
-  enc_utf8,       /* UTF-8 */
-  enc_eucjp,      /* EUC-JP */
-  enc_94,         /* EUC-KR, GB2312, BIG5 */
-  enc_euctw,      /* EUC-TW */
-  enc_gb18030,    /* GB18030 */
-  enc_sjis        /* SJIS */
-} enc_t;
-static inline enc_t
-locale_enc (void)
-{
-  const char *encoding = locale_charset ();
-  if (STREQ_OPT (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0, 0))
-    return enc_utf8;
-  if (STREQ_OPT (encoding, "EUC-JP", 'E', 'U', 'C', '-', 'J', 'P', 0, 0, 0))
-    return enc_eucjp;
-  if (STREQ_OPT (encoding, "EUC-KR", 'E', 'U', 'C', '-', 'K', 'R', 0, 0, 0)
-      || STREQ_OPT (encoding, "GB2312", 'G', 'B', '2', '3', '1', '2', 0, 0, 0)
-      || STREQ_OPT (encoding, "BIG5", 'B', 'I', 'G', '5', 0, 0, 0, 0, 0))
-    return enc_94;
-  if (STREQ_OPT (encoding, "EUC-TW", 'E', 'U', 'C', '-', 'T', 'W', 0, 0, 0))
-    return enc_euctw;
-  if (STREQ_OPT (encoding, "GB18030", 'G', 'B', '1', '8', '0', '3', '0', 0, 0))
-    return enc_gb18030;
-  if (STREQ_OPT (encoding, "SJIS", 'S', 'J', 'I', 'S', 0, 0, 0, 0, 0))
-    return enc_sjis;
-  return enc_other;
-}
-
-# if GNULIB_WCHAR_SINGLE
-/* When we know that the locale does not change, provide a speedup by
-   caching the value of locale_enc.  */
-static int cached_locale_enc = -1;
-static inline enc_t
-locale_enc_cached (void)
-{
-  if (cached_locale_enc < 0)
-    cached_locale_enc = locale_enc ();
-  return cached_locale_enc;
-}
-# else
-/* By default, don't make assumptions, hence no caching.  */
-#  define locale_enc_cached locale_enc
-# endif
-
-/* This lock protects the internal state of mbtowc against multiple simultaneous
-   calls of mbrtowc.  */
-gl_lock_define_initialized(static, mbtowc_lock)
-
 verify (sizeof (mbstate_t) >= 4);
-
 static char internal_state[4];

 size_t
 mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
 {
-  char *pstate = (char *)ps;
-
-  if (s == NULL)
-    {
-      pwc = NULL;
-      s = "";
-      n = 1;
-    }
-
-  if (n == 0)
-    return (size_t)(-2);
-
-  /* Here n > 0.  */
-
-  if (pstate == NULL)
-    pstate = internal_state;
-
-  {
-    size_t nstate = pstate[0];
-    char buf[4];
-    const char *p;
-    size_t m;
-    enc_t enc;
-    int res;
-
-    switch (nstate)
-      {
-      case 0:
-        p = s;
-        m = n;
-        break;
-      case 3:
-        buf[2] = pstate[3];
-        FALLTHROUGH;
-      case 2:
-        buf[1] = pstate[2];
-        FALLTHROUGH;
-      case 1:
-        buf[0] = pstate[1];
-        p = buf;
-        m = nstate;
-        buf[m++] = s[0];
-        if (n >= 2 && m < 4)
-          {
-            buf[m++] = s[1];
-            if (n >= 3 && m < 4)
-              buf[m++] = s[2];
-          }
-        break;
-      default:
-        errno = EINVAL;
-        return (size_t)(-1);
-      }
-
-    /* Here m > 0.  */
-
-    enc = locale_enc_cached ();
-
-    if (enc == enc_utf8) /* UTF-8 */
-      {
-        /* Achieve multi-thread safety by not calling mbtowc() at all.  */
-        /* Cf. unistr/u8-mbtouc.c.  */
-        unsigned char c = (unsigned char) p[0];
-
-        if (c < 0x80)
-          {
-            if (pwc != NULL)
-              *pwc = c;
-            res = (c == 0 ? 0 : 1);
-            goto success;
-          }
-        if (c >= 0xc2)
-          {
-            if (c < 0xe0)
-              {
-                if (m == 1)
-                  goto incomplete;
-                else /* m >= 2 */
-                  {
-                    unsigned char c2 = (unsigned char) p[1];
-
-                    if ((c2 ^ 0x80) < 0x40)
-                      {
-                        if (pwc != NULL)
-                          *pwc = ((unsigned int) (c & 0x1f) << 6)
-                                 | (unsigned int) (c2 ^ 0x80);
-                        res = 2;
-                        goto success;
-                      }
-                  }
-              }
-            else if (c < 0xf0)
-              {
-                if (m == 1)
-                  goto incomplete;
-                else
-                  {
-                    unsigned char c2 = (unsigned char) p[1];
-
-                    if ((c2 ^ 0x80) < 0x40
-                        && (c >= 0xe1 || c2 >= 0xa0)
-                        && (c != 0xed || c2 < 0xa0))
-                      {
-                        if (m == 2)
-                          goto incomplete;
-                        else /* m >= 3 */
-                          {
-                            unsigned char c3 = (unsigned char) p[2];
-
-                            if ((c3 ^ 0x80) < 0x40)
-                              {
-                                if (pwc != NULL)
-                                  *pwc = ((unsigned int) (c & 0x0f) << 12)
-                                         | ((unsigned int) (c2 ^ 0x80) << 6)
-                                         | (unsigned int) (c3 ^ 0x80);
-                                res = 3;
-                                goto success;
-                              }
-                          }
-                      }
-                  }
-              }
-            else if (c <= 0xf4)
-              {
-                if (m == 1)
-                  goto incomplete;
-                else
-                  {
-                    unsigned char c2 = (unsigned char) p[1];
-
-                    if ((c2 ^ 0x80) < 0x40
-                        && (c >= 0xf1 || c2 >= 0x90)
-                        && (c < 0xf4 || (c == 0xf4 && c2 < 0x90)))
-                      {
-                        if (m == 2)
-                          goto incomplete;
-                        else
-                          {
-                            unsigned char c3 = (unsigned char) p[2];
-
-                            if ((c3 ^ 0x80) < 0x40)
-                              {
-                                if (m == 3)
-                                  goto incomplete;
-                                else /* m >= 4 */
-                                  {
-                                    unsigned char c4 = (unsigned char) p[3];
-
-                                    if ((c4 ^ 0x80) < 0x40)
-                                      {
-                                        if (pwc != NULL)
-                                          *pwc = ((unsigned int) (c & 0x07) << 18)
-                                                 | ((unsigned int) (c2 ^ 0x80) << 12)
-                                                 | ((unsigned int) (c3 ^ 0x80) << 6)
-                                                 | (unsigned int) (c4 ^ 0x80);
-                                        res = 4;
-                                        goto success;
-                                      }
-                                  }
-                              }
-                          }
-                      }
-                  }
-              }
-          }
-        goto invalid;
-      }
-    else
-      {
-        /* The hidden internal state of mbtowc would make this function not
-           multi-thread safe.  Achieve multi-thread safety through a lock.  */
-        gl_lock_lock (mbtowc_lock);
-
-        /* Put the hidden internal state of mbtowc into its initial state.
-           This is needed at least with glibc, uClibc, and MSVC CRT.
-           See <https://sourceware.org/bugzilla/show_bug.cgi?id=9674>.  */
-        mbtowc (NULL, NULL, 0);
-
-        res = mbtowc (pwc, p, m);
-
-        gl_lock_unlock (mbtowc_lock);
-
-        if (res >= 0)
-          {
-            if (pwc != NULL && ((*pwc == 0) != (res == 0)))
-              abort ();
-            goto success;
-          }
-
-        /* mbtowc does not distinguish between invalid and incomplete multibyte
-           sequences.  But mbrtowc needs to make this distinction.
-           There are two possible approaches:
-             - Use iconv() and its return value.
-             - Use built-in knowledge about the possible encodings.
-           Given the low quality of implementation of iconv() on the systems
-           that lack mbrtowc(), we use the second approach.
-           The possible encodings are:
-             - 8-bit encodings,
-             - EUC-JP, EUC-KR, GB2312, EUC-TW, BIG5, GB18030, SJIS,
-             - UTF-8 (already handled above).
-           Use specialized code for each.  */
-        if (m >= 4 || m >= MB_CUR_MAX)
-          goto invalid;
-        /* Here MB_CUR_MAX > 1 and 0 < m < 4.  */
-        switch (enc)
-          {
-          /* As a reference for this code, you can use the GNU libiconv
-             implementation.  Look for uses of the RET_TOOFEW macro.  */
-
-          case enc_eucjp: /* EUC-JP */
-            {
-              if (m == 1)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e || c == 0x8f)
-                    goto incomplete;
-                }
-              if (m == 2)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if (c == 0x8f)
-                    {
-                      unsigned char c2 = (unsigned char) p[1];
-
-                      if (c2 >= 0xa1 && c2 < 0xff)
-                        goto incomplete;
-                    }
-                }
-              goto invalid;
-            }
-
-          case enc_94: /* EUC-KR, GB2312, BIG5 */
-            {
-              if (m == 1)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if (c >= 0xa1 && c < 0xff)
-                    goto incomplete;
-                }
-              goto invalid;
-            }
-
-          case enc_euctw: /* EUC-TW */
-            {
-              if (m == 1)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if ((c >= 0xa1 && c < 0xff) || c == 0x8e)
-                    goto incomplete;
-                }
-              else /* m == 2 || m == 3 */
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if (c == 0x8e)
-                    goto incomplete;
-                }
-              goto invalid;
-            }
-
-          case enc_gb18030: /* GB18030 */
-            {
-              if (m == 1)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if ((c >= 0x90 && c <= 0xe3) || (c >= 0xf8 && c <= 0xfe))
-                    goto incomplete;
-                }
-              else /* m == 2 || m == 3 */
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if (c >= 0x90 && c <= 0xe3)
-                    {
-                      unsigned char c2 = (unsigned char) p[1];
-
-                      if (c2 >= 0x30 && c2 <= 0x39)
-                        {
-                          if (m == 2)
-                            goto incomplete;
-                          else /* m == 3 */
-                            {
-                              unsigned char c3 = (unsigned char) p[2];
-
-                              if (c3 >= 0x81 && c3 <= 0xfe)
-                                goto incomplete;
-                            }
-                        }
-                    }
-                }
-              goto invalid;
-            }
-
-          case enc_sjis: /* SJIS */
-            {
-              if (m == 1)
-                {
-                  unsigned char c = (unsigned char) p[0];
-
-                  if ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xea)
-                      || (c >= 0xf0 && c <= 0xf9))
-                    goto incomplete;
-                }
-              goto invalid;
-            }
-
-          default:
-            /* An unknown multibyte encoding.  */
-            goto incomplete;
-          }
-      }
-
-   success:
-    /* res >= 0 is the corrected return value of mbtowc (pwc, p, m).  */
-    if (nstate >= (res > 0 ? res : 1))
-      abort ();
-    res -= nstate;
-    pstate[0] = 0;
-    return res;
-
-   incomplete:
-    {
-      size_t k = nstate;
-      /* Here 0 <= k < m < 4.  */
-      pstate[++k] = s[0];
-      if (k < m)
-        {
-          pstate[++k] = s[1];
-          if (k < m)
-            pstate[++k] = s[2];
-        }
-      if (k != m)
-        abort ();
-    }
-    pstate[0] = m;
-    return (size_t)(-2);
-
-   invalid:
-    errno = EILSEQ;
-    /* The conversion state is undefined, says POSIX.  */
-    return (size_t)(-1);
-  }
+# define FITS_IN_CHAR_TYPE(wc)  ((wc) <= WCHAR_MAX)
+# include "mbrtowc-impl.h"
 }

 #else
 /* Override the system's mbrtowc() function.  */

+# if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
+#  include "hard-locale.h"
+#  include <locale.h>
+# endif
+
 # undef mbrtowc

 size_t
@ -512,14 +137,20 @@ rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
  }
 # endif

+# if MBRTOWC_STORES_INCOMPLETE_BUG
+  ret = mbrtowc (&wc, s, n, ps);
+  if (ret < (size_t) -2 && pwc != NULL)
+    *pwc = wc;
+# else
  ret = mbrtowc (pwc, s, n, ps);
+# endif

 # if MBRTOWC_NUL_RETVAL_BUG
  if (ret < (size_t) -2 && !*pwc)
    return 0;
 # endif

-# if C_LOCALE_MAYBE_EILSEQ
+# if MBRTOWC_IN_C_LOCALE_MAYBE_EILSEQ
  if ((size_t) -2 <= ret && n != 0 && ! hard_locale (LC_CTYPE))
    {
      unsigned char uc = *s;
--- a/lib/mbsinit.c
+++ b/lib/mbsinit.c
@ -1,5 +1,5 @@
 /* Test for initial conversion state.
-   Copyright (C) 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 2008-2020 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2008.

   This program is free software: you can redistribute it and/or modify
@ -56,13 +56,10 @@ mbsinit (const mbstate_t *ps)
 {
 # if defined _WIN32 && !defined __CYGWIN__
  /* Native Windows.  */
-#  ifdef __MINGW32__
-  /* On mingw, 'mbstate_t' is defined as 'int'.  */
-  return ps == NULL || *ps == 0;
-#  else
-  /* MSVC defines 'mbstate_t' as an 8-byte struct; the first 4-bytes matter.  */
+  /* MSVC defines 'mbstate_t' as an 8-byte struct; the first 4 bytes matter.
+     On mingw, 'mbstate_t' is sometimes defined as 'int', sometimes defined as
+     an 8-byte struct, of which the first 4 bytes matter.  */
  return ps == NULL || *(const unsigned int *)ps == 0;
-#  endif
 # else
  /* Minix, HP-UX 11.00, Solaris 2.6, Interix, ...  */
  /* Maybe this definition works, maybe not...  */
--- a/lib/mbtowc-lock.c
+++ b/lib/mbtowc-lock.c
@ -0,0 +1,150 @@
+/* Return the internal lock used by mbrtowc and mbrtoc32.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */
+
+#include <config.h>
+
+/* When it is known that the gl_get_mbtowc_lock function is defined
+   by a dependency library, it should not be defined here.  */
+#if OMIT_MBTOWC_LOCK
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#else
+
+/* This file defines the internal lock used by mbrtowc and mbrtoc32.
+   It is a separate compilation unit, so that only one copy of it is
+   present when linking statically.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_mbtowc_lock
+
+/* Macro for exporting a symbol (function, not variable) defined in this file,
+   when compiled into a shared library.  */
+# ifndef DLL_EXPORTED
+#  if HAVE_VISIBILITY
+  /* Override the effect of the compiler option '-fvisibility=hidden'.  */
+#   define DLL_EXPORTED __attribute__((__visibility__("default")))
+#  elif defined _WIN32 || defined __CYGWIN__
+#   define DLL_EXPORTED __declspec(dllexport)
+#  else
+#   define DLL_EXPORTED
+#  endif
+# endif
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+#  include "windows-initguard.h"
+
+/* The return type is a 'CRITICAL_SECTION *', not a 'glwthread_mutex_t *',
+   because the latter is not guaranteed to be a stable ABI in the future.  */
+
+/* Make sure the function gets exported from DLLs.  */
+DLL_EXPORTED CRITICAL_SECTION *gl_get_mbtowc_lock (void);
+
+static glwthread_initguard_t guard = GLWTHREAD_INITGUARD_INIT;
+static CRITICAL_SECTION lock;
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+CRITICAL_SECTION *
+gl_get_mbtowc_lock (void)
+{
+  if (!guard.done)
+    {
+      if (InterlockedIncrement (&guard.started) == 0)
+        {
+          /* This thread is the first one to need the lock.  Initialize it.  */
+          InitializeCriticalSection (&lock);
+          guard.done = 1;
+        }
+      else
+        {
+          /* Don't let guard.started grow and wrap around.  */
+          InterlockedDecrement (&guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!guard.done)
+            Sleep (0);
+        }
+    }
+  return &lock;
+}
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED pthread_mutex_t *gl_get_mbtowc_lock (void);
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+pthread_mutex_t *
+gl_get_mbtowc_lock (void)
+{
+  return &mutex;
+}
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+#  include <stdlib.h>
+
+static int volatile init_needed = 1;
+static once_flag init_once = ONCE_FLAG_INIT;
+static mtx_t mutex;
+
+static void
+atomic_init (void)
+{
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    abort ();
+  init_needed = 0;
+}
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED mtx_t *gl_get_mbtowc_lock (void);
+
+/* Returns the internal lock used by mbrtowc and mbrtoc32.  */
+mtx_t *
+gl_get_mbtowc_lock (void)
+{
+  if (init_needed)
+    call_once (&init_once, atomic_init);
+  return &mutex;
+}
+
+# endif
+
+# if (defined _WIN32 || defined __CYGWIN__) && !defined _MSC_VER
+/* Make sure the '__declspec(dllimport)' in mbrtowc.c and mbrtoc32.c does not
+   cause a link failure when no DLLs are involved.  */
+#  if defined _WIN64 || defined _LP64
+#   define IMP(x) __imp_##x
+#  else
+#   define IMP(x) _imp__##x
+#  endif
+void * IMP(gl_get_mbtowc_lock) = &gl_get_mbtowc_lock;
+# endif
+
+#endif
--- a/lib/mbtowc-lock.h
+++ b/lib/mbtowc-lock.h
@ -0,0 +1,115 @@
+/* Use the internal lock used by mbrtowc and mbrtoc32.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */
+
+/* Use a lock, so that no two threads can invoke mbtowc at the same time.  */
+
+static inline int
+mbtowc_unlocked (wchar_t *pwc, const char *p, size_t m)
+{
+  /* Put the hidden internal state of mbtowc into its initial state.
+     This is needed at least with glibc, uClibc, and MSVC CRT.
+     See <https://sourceware.org/bugzilla/show_bug.cgi?id=9674>.  */
+  mbtowc (NULL, NULL, 0);
+
+  return mbtowc (pwc, p, m);
+}
+
+/* Prohibit renaming this symbol.  */
+#undef gl_get_mbtowc_lock
+
+#if defined _WIN32 && !defined __CYGWIN__
+
+extern __declspec(dllimport) CRITICAL_SECTION *gl_get_mbtowc_lock (void);
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  CRITICAL_SECTION *lock = gl_get_mbtowc_lock ();
+  int ret;
+
+  EnterCriticalSection (lock);
+  ret = mbtowc_unlocked (pwc, p, m);
+  LeaveCriticalSection (lock);
+
+  return ret;
+}
+
+#elif HAVE_PTHREAD_API /* AIX, IRIX, Cygwin */
+
+extern
+# if defined _WIN32 || defined __CYGWIN__
+  __declspec(dllimport)
+# endif
+  pthread_mutex_t *gl_get_mbtowc_lock (void);
+
+# if HAVE_WEAK_SYMBOLS /* IRIX */
+
+   /* Avoid the need to link with '-lpthread'.  */
+#  pragma weak pthread_mutex_lock
+#  pragma weak pthread_mutex_unlock
+
+   /* Determine whether libpthread is in use.  */
+#  pragma weak pthread_mutexattr_gettype
+   /* See the comments in lock.h.  */
+#  define pthread_in_use() \
+     (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+
+# else
+#  define pthread_in_use() 1
+# endif
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  if (pthread_in_use())
+    {
+      pthread_mutex_t *lock = gl_get_mbtowc_lock ();
+      int ret;
+
+      if (pthread_mutex_lock (lock))
+        abort ();
+      ret = mbtowc_unlocked (pwc, p, m);
+      if (pthread_mutex_unlock (lock))
+        abort ();
+
+      return ret;
+    }
+  else
+    return mbtowc_unlocked (pwc, p, m);
+}
+
+#elif HAVE_THREADS_H
+
+extern mtx_t *gl_get_mbtowc_lock (void);
+
+static int
+mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
+{
+  mtx_t *lock = gl_get_mbtowc_lock ();
+  int ret;
+
+  if (mtx_lock (lock) != thrd_success)
+    abort ();
+  ret = mbtowc_unlocked (pwc, p, m);
+  if (mtx_unlock (lock) != thrd_success)
+    abort ();
+
+  return ret;
+}
+
+#endif
--- a/lib/memchr.c
+++ b/lib/memchr.c
@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2004, 2006, 2008-2019
+/* Copyright (C) 1991, 1993, 1996-1997, 1999-2000, 2003-2004, 2006, 2008-2020
   Free Software Foundation, Inc.

   Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
--- a/lib/memchr.valgrind
+++ b/lib/memchr.valgrind
@ -1,6 +1,6 @@
 # Suppress a valgrind message about use of uninitialized memory in memchr().

-# Copyright (C) 2009-2019 Free Software Foundation, Inc.
+# Copyright (C) 2009-2020 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
--- a/lib/mempcpy.c
+++ b/lib/mempcpy.c
@ -1,5 +1,5 @@
 /* Copy memory area and return pointer after last written byte.
-   Copyright (C) 2003, 2007, 2009-2019 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2007, 2009-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/minmax.h
+++ b/lib/minmax.h
@ -1,5 +1,5 @@
 /* MIN, MAX macros.
-   Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2019 Free Software
+   Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
--- a/lib/mkdir.c
+++ b/lib/mkdir.c
@ -1,7 +1,7 @@
 /* On some systems, mkdir ("foo/", 0700) fails because of the trailing
   slash.  On those systems, this wrapper removes the trailing slash.

-   Copyright (C) 2001, 2003, 2006, 2008-2019 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2003, 2006, 2008-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/mkstemp.c
+++ b/lib/mkstemp.c
@ -1,4 +1,4 @@
-/* Copyright (C) 1998-1999, 2001, 2005-2007, 2009-2019 Free Software
+/* Copyright (C) 1998-1999, 2001, 2005-2007, 2009-2020 Free Software
   Foundation, Inc.
   This file is derived from the one in the GNU C Library.

--- a/lib/mkstemps.c
+++ b/lib/mkstemps.c
@ -1,4 +1,4 @@
-/* Copyright (C) 1998-1999, 2001, 2005-2007, 2009-2019 Free Software
+/* Copyright (C) 1998-1999, 2001, 2005-2007, 2009-2020 Free Software
   Foundation, Inc.
   This file is derived from the one in the GNU C Library.

--- a/lib/msvc-inval.c
+++ b/lib/msvc-inval.c
@ -1,5 +1,5 @@
 /* Invalid parameter handler for MSVC runtime libraries.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/msvc-inval.h
+++ b/lib/msvc-inval.h
@ -1,5 +1,5 @@
 /* Invalid parameter handler for MSVC runtime libraries.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/msvc-nothrow.c
+++ b/lib/msvc-nothrow.c
@ -1,6 +1,6 @@
 /* Wrappers that don't throw invalid parameter notifications
   with MSVC runtime libraries.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/msvc-nothrow.h
+++ b/lib/msvc-nothrow.h
@ -1,6 +1,6 @@
 /* Wrappers that don't throw invalid parameter notifications
   with MSVC runtime libraries.
-   Copyright (C) 2011-2019 Free Software Foundation, Inc.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
--- a/lib/pathmax.h
+++ b/lib/pathmax.h
@ -1,5 +1,5 @@
 /* Define PATH_MAX somehow.  Requires sys/types.h.
-   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2019 Free Software
+   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
@ -20,7 +20,7 @@

 /* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,
   including the terminating NUL byte.
-   <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
+   <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
   PATH_MAX is not defined on systems which have no limit on filename length,
   such as GNU/Hurd.

--- a/lib/printf-args.c
+++ b/lib/printf-args.c
@ -1,5 +1,5 @@
 /* Decomposed printf argument list.
-   Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2019 Free Software
+   Copyright (C) 1999, 2002-2003, 2005-2007, 2009-2020 Free Software
   Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
@ -65,14 +65,12 @@ PRINTF_FETCHARGS (va_list args, arguments *a)
      case TYPE_ULONGINT:
        ap->a.a_ulongint = va_arg (args, unsigned long int);
        break;
-#if HAVE_LONG_LONG_INT
      case TYPE_LONGLONGINT:
        ap->a.a_longlongint = va_arg (args, long long int);
        break;
      case TYPE_ULONGLONGINT:
        ap->a.a_ulonglongint = va_arg (args, unsigned long long int);
        break;
-#endif
      case TYPE_DOUBLE:
        ap->a.a_double = va_arg (args, double);
        break;
@ -135,11 +133,9 @@ PRINTF_FETCHARGS (va_list args, arguments *a)
      case TYPE_COUNT_LONGINT_POINTER:
        ap->a.a_count_longint_pointer = va_arg (args, long int *);
        break;
-#if HAVE_LONG_LONG_INT
      case TYPE_COUNT_LONGLONGINT_POINTER:
        ap->a.a_count_longlongint_pointer = va_arg (args, long long int *);
        break;
-#endif
 #if ENABLE_UNISTDIO
      /* The unistdio extensions.  */
      case TYPE_U8_STRING:
--- a/Show more
+++ b/Show more