f6c7ed54c7
This comes from gnulib 348402f2aac342bc925b7aaea9ee3cc353f427a9 plus a custom patch to support compilation of arpg in C++11. * lib/hard-locale.c, lib/hard-locale.h, m4/hard-locale.m4, m4/ltargz.m4: New files. * lib/Makefile.am, lib/alloca.in.h, lib/argmatch.c, lib/argmatch.h, lib/argp-ba.c, lib/argp-eexst.c, lib/argp-fmtstream.c, lib/argp-fmtstream.h, lib/argp-fs-xinl.c, 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/argp.h, lib/asnprintf.c, lib/basename-lgpl.c, lib/c-ctype.h, lib/c-strcase.h, lib/c-strcasecmp.c, lib/c-strcaseeq.h, lib/c-strncasecmp.c, lib/config.charset, lib/dirname-lgpl.c, lib/dirname.h, lib/dosname.h, lib/errno.in.h, lib/error.c, lib/error.h, lib/exitfail.c, lib/exitfail.h, lib/fcntl.in.h, lib/float+.h, lib/float.c, lib/float.in.h, lib/getopt.c, lib/getopt.in.h, lib/getopt1.c, lib/getopt_int.h, lib/gettext.h, lib/gettimeofday.c, lib/hard-locale.h, lib/intprops.h, lib/isatty.c, lib/itold.c, lib/localcharset.c, lib/localcharset.h, lib/lstat.c, lib/malloc.c, lib/mbrtowc.c, lib/mbsinit.c, lib/memchr.c, lib/mempcpy.c, lib/mkstemp.c, lib/mkstemps.c, lib/msvc-inval.c, lib/msvc-inval.h, lib/msvc-nothrow.c, lib/msvc-nothrow.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/quote.h, lib/quotearg.c, lib/quotearg.h, lib/rawmemchr.c, lib/ref-add.sin, lib/ref-del.sin, lib/secure_getenv.c, lib/size_max.h, lib/sleep.c, lib/stat.c, lib/stdalign.in.h, lib/stdbool.in.h, lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/stdlib.in.h, lib/stpcpy.c, lib/strcasecmp.c, lib/strchrnul.c, lib/streq.h, lib/strerror-override.c, lib/strerror-override.h, lib/strerror.c, lib/string.in.h, lib/strings.in.h, lib/stripslash.c, lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/strverscmp.c, lib/sys_stat.in.h, lib/sys_time.in.h, lib/sys_types.in.h, lib/sys_wait.in.h, lib/sysexits.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/wchar.in.h, lib/wctype.in.h, lib/xalloc-die.c, lib/xalloc-oversized.h, lib/xalloc.h, lib/xmalloc.c, lib/xsize.h, m4/00gnulib.m4, m4/absolute-header.m4, m4/alloca.m4, m4/argp.m4, m4/codeset.m4, m4/configmake.m4, m4/dirname.m4, m4/double-slash-root.m4, m4/errno_h.m4, m4/error.m4, m4/exponentd.m4, m4/extensions.m4, m4/extern-inline.m4, m4/fcntl-o.m4, m4/fcntl_h.m4, m4/float_h.m4, m4/getopt.m4, m4/gettimeofday.m4, m4/glibc21.m4, m4/gnulib-cache.m4, m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/gnulib-tool.m4, m4/include_next.m4, m4/intmax_t.m4, m4/inttypes_h.m4, m4/isatty.m4, m4/largefile.m4, m4/localcharset.m4, m4/locale-fr.m4, m4/locale-ja.m4, m4/locale-zh.m4, m4/longlong.m4, m4/lstat.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/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/quote.m4, m4/quotearg.m4, m4/rawmemchr.m4, m4/secure_getenv.m4, m4/size_max.m4, m4/sleep.m4, m4/ssize_t.m4, m4/stat.m4, m4/stdalign.m4, m4/stdbool.m4, m4/stddef_h.m4, m4/stdint.m4, m4/stdint_h.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/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/sysexits.m4, m4/tempname.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, tests/core/randtgba.cc, tools/snippet/arg-nonnull.h, tools/snippet/c++defs.h, tools/snippet/warn-on-use.h: Update.
88 lines
2.7 KiB
Text
88 lines
2.7 KiB
Text
# memchr.m4 serial 12
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dnl Copyright (C) 2002-2004, 2009-2016 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN_ONCE([gl_FUNC_MEMCHR],
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[
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dnl Check for prerequisites for memory fence checks.
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gl_FUNC_MMAP_ANON
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AC_CHECK_HEADERS_ONCE([sys/mman.h])
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AC_CHECK_FUNCS_ONCE([mprotect])
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AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
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m4_ifdef([gl_FUNC_MEMCHR_OBSOLETE], [
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dnl These days, we assume memchr is present. But if support for old
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dnl platforms is desired:
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AC_CHECK_FUNCS_ONCE([memchr])
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if test $ac_cv_func_memchr = no; then
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HAVE_MEMCHR=0
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fi
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])
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if test $HAVE_MEMCHR = 1; then
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# Detect platform-specific bugs in some versions of glibc:
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# memchr should not dereference anything with length 0
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# http://bugzilla.redhat.com/499689
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# memchr should not dereference overestimated length after a match
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# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737
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# http://sourceware.org/bugzilla/show_bug.cgi?id=10162
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# Assume that memchr works on platforms that lack mprotect.
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AC_CACHE_CHECK([whether memchr works], [gl_cv_func_memchr_works],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
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#include <string.h>
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#if HAVE_SYS_MMAN_H
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# include <fcntl.h>
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# include <unistd.h>
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# include <sys/types.h>
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# include <sys/mman.h>
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# ifndef MAP_FILE
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# define MAP_FILE 0
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# endif
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#endif
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]], [[
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int result = 0;
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char *fence = NULL;
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#if HAVE_SYS_MMAN_H && HAVE_MPROTECT
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# if HAVE_MAP_ANONYMOUS
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const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
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const int fd = -1;
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# else /* !HAVE_MAP_ANONYMOUS */
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const int flags = MAP_FILE | MAP_PRIVATE;
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int fd = open ("/dev/zero", O_RDONLY, 0666);
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if (fd >= 0)
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# endif
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{
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int pagesize = getpagesize ();
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char *two_pages =
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(char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
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flags, fd, 0);
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if (two_pages != (char *)(-1)
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&& mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
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fence = two_pages + pagesize;
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}
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#endif
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if (fence)
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{
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if (memchr (fence, 0, 0))
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result |= 1;
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strcpy (fence - 9, "12345678");
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if (memchr (fence - 9, 0, 79) != fence - 1)
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result |= 2;
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if (memchr (fence - 1, 0, 3) != fence - 1)
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result |= 4;
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}
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return result;
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]])], [gl_cv_func_memchr_works=yes], [gl_cv_func_memchr_works=no],
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[dnl Be pessimistic for now.
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gl_cv_func_memchr_works="guessing no"])])
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if test "$gl_cv_func_memchr_works" != yes; then
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REPLACE_MEMCHR=1
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fi
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fi
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])
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# Prerequisites of lib/memchr.c.
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AC_DEFUN([gl_PREREQ_MEMCHR], [
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AC_CHECK_HEADERS([bp-sym.h])
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])
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