mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-30 08:09:04 +00:00
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
# serial 5
|
|
# See if we need to provide readlinkat replacement.
|
|
|
|
dnl Copyright (C) 2009-2020 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 Eric Blake.
|
|
|
|
AC_DEFUN([gl_FUNC_READLINKAT],
|
|
[
|
|
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
|
|
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|
AC_CHECK_FUNCS_ONCE([readlinkat])
|
|
AC_REQUIRE([gl_FUNC_READLINK])
|
|
if test $ac_cv_func_readlinkat = no; then
|
|
HAVE_READLINKAT=0
|
|
else
|
|
AC_CACHE_CHECK([whether readlinkat signature is correct],
|
|
[gl_cv_decl_readlinkat_works],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <unistd.h>
|
|
/* Check whether original declaration has correct type. */
|
|
ssize_t readlinkat (int, char const *, char *, size_t);]])],
|
|
[gl_cv_decl_readlinkat_works=yes],
|
|
[gl_cv_decl_readlinkat_works=no])])
|
|
# Assume readinkat has the same trailing slash bug as readlink,
|
|
# as is the case on Mac Os X 10.10
|
|
case "$gl_cv_func_readlink_works" in
|
|
*yes)
|
|
if test "$gl_cv_decl_readlinkat_works" != yes; then
|
|
REPLACE_READLINKAT=1
|
|
fi
|
|
;;
|
|
*)
|
|
REPLACE_READLINKAT=1
|
|
;;
|
|
esac
|
|
fi
|
|
])
|