mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-27 07:37:33 +00:00
61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
# fstatat.m4 serial 3
|
|
dnl Copyright (C) 2004-2017 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.
|
|
|
|
# Written by Jim Meyering.
|
|
|
|
# If we have the fstatat function, and it has the bug (in AIX 7.1)
|
|
# that it does not fill in st_size correctly, use the replacement function.
|
|
AC_DEFUN([gl_FUNC_FSTATAT],
|
|
[
|
|
AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
AC_CHECK_FUNCS_ONCE([fstatat])
|
|
|
|
if test $ac_cv_func_fstatat = no; then
|
|
HAVE_FSTATAT=0
|
|
else
|
|
dnl Test for an AIX 7.1 bug; see
|
|
dnl <http://lists.gnu.org/archive/html/bug-tar/2011-09/msg00015.html>.
|
|
AC_CACHE_CHECK([whether fstatat (..., 0) works],
|
|
[gl_cv_func_fstatat_zero_flag],
|
|
[AC_RUN_IFELSE(
|
|
[AC_LANG_SOURCE(
|
|
[[
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
int
|
|
main (void)
|
|
{
|
|
struct stat a;
|
|
return fstatat (AT_FDCWD, ".", &a, 0) != 0;
|
|
}
|
|
]])],
|
|
[gl_cv_func_fstatat_zero_flag=yes],
|
|
[gl_cv_func_fstatat_zero_flag=no],
|
|
[case "$host_os" in
|
|
aix*) gl_cv_func_fstatat_zero_flag="guessing no";;
|
|
*) gl_cv_func_fstatat_zero_flag="guessing yes";;
|
|
esac
|
|
])
|
|
])
|
|
|
|
case $gl_cv_func_fstatat_zero_flag+$gl_cv_func_lstat_dereferences_slashed_symlink in
|
|
*yes+*yes) ;;
|
|
*) REPLACE_FSTATAT=1
|
|
case $gl_cv_func_fstatat_zero_flag in
|
|
*yes)
|
|
AC_DEFINE([HAVE_WORKING_FSTATAT_ZERO_FLAG], [1],
|
|
[Define to 1 if fstatat (..., 0) works.
|
|
For example, it does not work in AIX 7.1.])
|
|
;;
|
|
esac
|
|
;;
|
|
esac
|
|
fi
|
|
])
|