93f6e21759
* lib/Makefile.am, lib/alloca.c, lib/alloca.in.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/dirname-lgpl.c, lib/dirname.h, lib/dosname.h, lib/errno.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/intprops.h, lib/itold.c, lib/malloc.c, lib/memchr.c, lib/memchr.valgrind, lib/mempcpy.c, lib/printf-args.c, lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h, lib/rawmemchr.c, lib/rawmemchr.valgrind, lib/size_max.h, lib/sleep.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/strcasecmp.c, lib/strchrnul.c, lib/strchrnul.valgrind, 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/sys_types.in.h, lib/sysexits.in.h, lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/verify.h, lib/vsnprintf.c, lib/wchar.in.h, lib/xsize.h, m4/00gnulib.m4, m4/alloca.m4, m4/argp.m4, m4/dirname.m4, m4/double-slash-root.m4, m4/errno_h.m4, m4/exponentd.m4, m4/extensions.m4, m4/float_h.m4, m4/getopt.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/longlong.m4, m4/malloc.m4, m4/math_h.m4, m4/memchr.m4, m4/mempcpy.m4, m4/mmap-anon.m4, m4/multiarch.m4, m4/nocrash.m4, m4/off_t.m4, m4/printf.m4, m4/rawmemchr.m4, m4/size_max.m4, m4/sleep.m4, m4/ssize_t.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/strcase.m4, m4/strchrnul.m4, m4/strerror.m4, m4/string_h.m4, m4/strings_h.m4, m4/strndup.m4, m4/strnlen.m4, m4/sys_socket_h.m4, m4/sys_types_h.m4, m4/sysexits.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/wint_t.m4, m4/xsize.m4, tools/snippet/_Noreturn.h, tools/snippet/arg-nonnull.h, tools/snippet/c++defs.h, tools/snippet/warn-on-use.h: New files from gnulib 1af55d85d9762a679b4302d5995f05ccd883e956. * configure.ac, Makefile.am: Adjust to compile gnulib. * src/bin/Makefile.am: Adjust to use gnulib. * README: Mention lib/.
55 lines
2 KiB
Text
55 lines
2 KiB
Text
# mmap-anon.m4 serial 10
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dnl Copyright (C) 2005, 2007, 2009-2012 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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# Detect how mmap can be used to create anonymous (not file-backed) memory
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# mappings.
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# - On Linux, AIX, OSF/1, Solaris, Cygwin, Interix, Haiku, both MAP_ANONYMOUS
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# and MAP_ANON exist and have the same value.
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# - On HP-UX, only MAP_ANONYMOUS exists.
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# - On Mac OS X, FreeBSD, NetBSD, OpenBSD, only MAP_ANON exists.
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# - On IRIX, neither exists, and a file descriptor opened to /dev/zero must be
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# used.
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AC_DEFUN([gl_FUNC_MMAP_ANON],
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[
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dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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# Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
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# fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
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# irrelevant for anonymous mappings.
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AC_CHECK_FUNC([mmap], [gl_have_mmap=yes], [gl_have_mmap=no])
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# Try to allow MAP_ANONYMOUS.
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gl_have_mmap_anonymous=no
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if test $gl_have_mmap = yes; then
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AC_MSG_CHECKING([for MAP_ANONYMOUS])
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AC_EGREP_CPP([I cannot identify this map], [
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#include <sys/mman.h>
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#ifdef MAP_ANONYMOUS
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I cannot identify this map
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#endif
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],
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[gl_have_mmap_anonymous=yes])
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if test $gl_have_mmap_anonymous != yes; then
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AC_EGREP_CPP([I cannot identify this map], [
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#include <sys/mman.h>
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#ifdef MAP_ANON
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I cannot identify this map
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#endif
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],
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[AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
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[Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
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gl_have_mmap_anonymous=yes])
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fi
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AC_MSG_RESULT([$gl_have_mmap_anonymous])
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if test $gl_have_mmap_anonymous = yes; then
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AC_DEFINE([HAVE_MAP_ANONYMOUS], [1],
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[Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
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config.h and <sys/mman.h>.])
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fi
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fi
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])
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