15c6926126
* Add gnulib files generated by gnulib-tool in build-aux, m4 and
grub-core/gnulib directories
* .bzignore: Add **/.deps and autogenerated gnulib files
* configure.ac: Assign auxiliary directory to build-aux, add invocation
of gnulib macros, add grub-core/gnulib/Makefile
* Makefile.am: Add gnulib directory in SUBDIRS (removing unnecessary .),
include m4 directory to aclocal.
* Makefile.util.def: Remove direct compilation of gnulib source files
and use the new grub-core/gnulib/libgnu.a.
* build-aux/config.rpath: move config.rpath from top directory to
build-aux
* conf/Makefile.common: Remove the macro _GL_UNUSED already defined
in gnulib headers
* conf/Makefile.extra-dist: Add m4/gnulib-cache.m4
* grub-core/Makefile.core.def: Remove unnecessary extra_dist
* grub-core/lib/posix_wrap/localcharset.h (locale_charset): Update
header.
* grub-core/lib/posix_wrap/langinfo.h (nl_langinfo): Return static
string.
59 lines
2.1 KiB
Text
59 lines
2.1 KiB
Text
# mmap-anon.m4 serial 8
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dnl Copyright (C) 2005, 2007, 2009-2010 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 MacOS 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 Work around a bug of AC_EGREP_CPP in autoconf-2.57.
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AC_REQUIRE([AC_PROG_CPP])
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AC_REQUIRE([AC_PROG_EGREP])
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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 cant identify this map.], [
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#include <sys/mman.h>
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#ifdef MAP_ANONYMOUS
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I cant 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 $gl_have_mmap_anonymous != yes; then
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AC_EGREP_CPP([I cant identify this map.], [
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#include <sys/mman.h>
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#ifdef MAP_ANON
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I cant identify this map.
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#endif
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],
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[AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
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[Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
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gl_have_mmap_anonymous=yes])
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fi
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AC_MSG_RESULT([$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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