-# serial 22 -*- Autoconf -*-
+# serial 26 -*- Autoconf -*-
dnl Find out how to get the file descriptor associated with an open DIR*.
-# Copyright (C) 2001-2006, 2008-2012 Free Software Foundation, Inc.
+# Copyright (C) 2001-2006, 2008-2018 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_DIRFD],
[
AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
dnl Persuade glibc <dirent.h> to declare dirfd().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
fi
AC_CACHE_CHECK([whether dirfd is a macro],
- gl_cv_func_dirfd_macro,
+ [gl_cv_func_dirfd_macro],
[AC_EGREP_CPP([dirent_header_defines_dirfd], [
#include <sys/types.h>
#include <dirent.h>
#ifdef dirfd
dirent_header_defines_dirfd
#endif],
- gl_cv_func_dirfd_macro=yes,
- gl_cv_func_dirfd_macro=no)])
+ [gl_cv_func_dirfd_macro=yes],
+ [gl_cv_func_dirfd_macro=no])])
- # Use the replacement only if we have no function or macro with that name.
- if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no; then
- if test $ac_cv_have_decl_dirfd = yes; then
- # If the system declares dirfd already, let's declare rpl_dirfd instead.
+ # Use the replacement if we have no function or macro with that name,
+ # or if OS/2 kLIBC whose dirfd() does not work.
+ # Replace only if the system declares dirfd already.
+ case $ac_cv_func_dirfd,$gl_cv_func_dirfd_macro,$host_os,$ac_cv_have_decl_dirfd in
+ no,no,*,yes | *,*,os2*,yes)
REPLACE_DIRFD=1
- fi
- fi
+ AC_DEFINE([REPLACE_DIRFD], [1],
+ [Define to 1 if gnulib's dirfd() replacement is used.]);;
+ esac
])
dnl Prerequisites of lib/dirfd.c.