mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-05 22:20:24 -08:00
59fbaca6b9
* admin/merge-gnulib (GNULIB_MODULES): Add stringeq. With current Gnulib it is already present as in indirect dependency; listing it here because Emacs now depends on it directly. * lib-src/ebrowse.c, lib-src/etags.c: (streq): Remove, as Gnulib defines this now. * lib/fseterr.c, lib/fseterr.h, lib/issymlink.c, lib/issymlink.h: * lib/issymlinkat.c, lib/stdio-consolesafe.c, lib/string.c: * m4/fseterr.m4, m4/gettext_h.m4, m4/stringeq.m4: New files from Gnulib. * src/conf_post.h (tzfree) [__ANDROID_API__ >= 35]: Remove.
54 lines
2 KiB
Text
54 lines
2 KiB
Text
# free.m4
|
|
# serial 6
|
|
dnl Copyright (C) 2003-2005, 2009-2025 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.
|
|
dnl This file is offered as-is, without any warranty.
|
|
|
|
# Written by Paul Eggert and Bruno Haible.
|
|
|
|
AC_DEFUN([gl_FUNC_FREE],
|
|
[
|
|
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
|
|
|
|
dnl In the next release of POSIX, free must preserve errno.
|
|
dnl https://www.austingroupbugs.net/view.php?id=385
|
|
dnl https://sourceware.org/PR17924
|
|
dnl So far, we know of three platforms that do this:
|
|
dnl * glibc >= 2.33, thanks to the fix for this bug:
|
|
dnl <https://sourceware.org/PR17924>
|
|
dnl * OpenBSD >= 4.5, thanks to this commit:
|
|
dnl <https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/malloc.c.diff?r1=1.100&r2=1.101&f=h>
|
|
dnl * Solaris, because its malloc() implementation is based on brk(),
|
|
dnl not mmap(); hence its free() implementation makes no system calls.
|
|
dnl For other platforms, you can only be sure if they state it in their
|
|
dnl documentation, or by code inspection of the free() implementation in libc.
|
|
AC_CACHE_CHECK([whether free is known to preserve errno],
|
|
[gl_cv_func_free_preserves_errno],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <stdlib.h>
|
|
]],
|
|
[[#if 2 < __GLIBC__ + (33 <= __GLIBC_MINOR__)
|
|
#elif defined __OpenBSD__
|
|
#elif defined __sun
|
|
#else
|
|
#error "'free' is not known to preserve errno"
|
|
#endif
|
|
]])],
|
|
[gl_cv_func_free_preserves_errno=yes],
|
|
[gl_cv_func_free_preserves_errno=no])
|
|
])
|
|
|
|
case $gl_cv_func_free_preserves_errno in
|
|
*yes)
|
|
AC_DEFINE([HAVE_FREE_POSIX], [1],
|
|
[Define if the 'free' function is guaranteed to preserve errno.])
|
|
;;
|
|
*) REPLACE_FREE=1 ;;
|
|
esac
|
|
])
|
|
|
|
# Prerequisites of lib/free.c.
|
|
AC_DEFUN([gl_PREREQ_FREE], [:])
|