f434ba0309
2010-05-23 Pedro Alves <pedro@codesourcery.com> Update gnulib from latest git. (250b80067c1e1d8faa0c42fb572f721975b929c5) * gnulib/memcmp.c: Removed. * gnulib/memchr.valgrind: New. * gnulib/stddef.in.h: New. * gnulib/Makefile.am: Updated. * gnulib/memchr.c: Updated. * gnulib/memmem.c: Updated. * gnulib/stdint.in.h: Updated. * gnulib/str-two-way.h: Updated. * gnulib/string.in.h: Updated. * gnulib/wchar.in.h: Updated. * gnulib/extra/link-warning.h: Removed. * gnulib/extra/c++defs.h: New. * gnulib/extra/warn-on-use.h: New. * gnulib/extra/arg-nonnull.h: Updated. * gnulib/m4/extensions.m4: Updated. * gnulib/m4/gnulib-cache.m4: Updated. * gnulib/m4/gnulib-common.m4: Updated. * gnulib/m4/gnulib-comp.m4: Updated. * gnulib/m4/gnulib-tool.m4: Updated. * gnulib/m4/include_next.m4: Updated. * gnulib/m4/longlong.m4: Updated. * gnulib/m4/memchr.m4: Updated. * gnulib/m4/memmem.m4: Updated. * gnulib/m4/stdint.m4: Updated. * gnulib/m4/string_h.m4: Updated. * gnulib/m4/memcmp.m4: Removed. * gnulib/m4/onceonly_2_57.m4: Removed. * gnulib/m4/00gnulib.m4: New. * gnulib/m4/mmap-anon.m4: New. * gnulib/m4/multiarch.m4: New. * gnulib/m4/onceonly.m4: New. * gnulib/m4/stddef_h.m4: New. * gnulib/m4/warn-on-use.m4: New. * gnulib/m4/wchar.m4: Removed. * gnulib/m4/wchar_h.m4: New. * gnulib/m4/wchar_t.m4: New. * gnulib/m4/wint_t.m4: New. * aclocal.m4: Regenerate. * config.in: Likewise. * configure: Likewise. * gnulib/Makefile.in: Likewise. gdb/gdbserver/ 2010-05-23 Pedro Alves <pedro@codesourcery.com> * config.h, configure: Regenerate.
59 lines
2.1 KiB
Text
59 lines
2.1 KiB
Text
# mmap-anon.m4 serial 8
|
|
dnl Copyright (C) 2005, 2007, 2009-2010 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
# Detect how mmap can be used to create anonymous (not file-backed) memory
|
|
# mappings.
|
|
# - On Linux, AIX, OSF/1, Solaris, Cygwin, Interix, Haiku, both MAP_ANONYMOUS
|
|
# and MAP_ANON exist and have the same value.
|
|
# - On HP-UX, only MAP_ANONYMOUS exists.
|
|
# - On MacOS X, FreeBSD, NetBSD, OpenBSD, only MAP_ANON exists.
|
|
# - On IRIX, neither exists, and a file descriptor opened to /dev/zero must be
|
|
# used.
|
|
|
|
AC_DEFUN([gl_FUNC_MMAP_ANON],
|
|
[
|
|
dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
|
|
AC_REQUIRE([AC_PROG_CPP])
|
|
AC_REQUIRE([AC_PROG_EGREP])
|
|
|
|
dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
|
|
# Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
|
|
# fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
|
|
# irrelevant for anonymous mappings.
|
|
AC_CHECK_FUNC([mmap], [gl_have_mmap=yes], [gl_have_mmap=no])
|
|
|
|
# Try to allow MAP_ANONYMOUS.
|
|
gl_have_mmap_anonymous=no
|
|
if test $gl_have_mmap = yes; then
|
|
AC_MSG_CHECKING([for MAP_ANONYMOUS])
|
|
AC_EGREP_CPP([I cant identify this map.], [
|
|
#include <sys/mman.h>
|
|
#ifdef MAP_ANONYMOUS
|
|
I cant identify this map.
|
|
#endif
|
|
],
|
|
[gl_have_mmap_anonymous=yes])
|
|
if test $gl_have_mmap_anonymous != yes; then
|
|
AC_EGREP_CPP([I cant identify this map.], [
|
|
#include <sys/mman.h>
|
|
#ifdef MAP_ANON
|
|
I cant identify this map.
|
|
#endif
|
|
],
|
|
[AC_DEFINE([MAP_ANONYMOUS], [MAP_ANON],
|
|
[Define to a substitute value for mmap()'s MAP_ANONYMOUS flag.])
|
|
gl_have_mmap_anonymous=yes])
|
|
fi
|
|
AC_MSG_RESULT([$gl_have_mmap_anonymous])
|
|
if test $gl_have_mmap_anonymous = yes; then
|
|
AC_DEFINE([HAVE_MAP_ANONYMOUS], [1],
|
|
[Define to 1 if mmap()'s MAP_ANONYMOUS flag is available after including
|
|
config.h and <sys/mman.h>.])
|
|
fi
|
|
fi
|
|
])
|