-#serial 13 -*- Autoconf -*-
+# serial 17 -*- Autoconf -*-
dnl Find out how to get the file descriptor associated with an open DIR*.
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2006, 2008-2009 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_LIBSOURCES([dirfd.c, dirfd.h])
+ AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+ gl_REPLACE_DIRENT_H
+
+ dnl Persuade glibc <dirent.h> to declare dirfd().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
AC_REQUIRE([AC_PROG_CPP])
AC_REQUIRE([AC_PROG_EGREP])
- AC_CHECK_FUNCS(dirfd)
+
+ AC_CHECK_FUNCS([dirfd])
AC_CHECK_DECLS([dirfd], , ,
[#include <sys/types.h>
#include <dirent.h>])
+ if test $ac_cv_have_decl_dirfd = no; then
+ HAVE_DECL_DIRFD=0
+ fi
AC_CACHE_CHECK([whether dirfd is a macro],
gl_cv_func_dirfd_macro,
for ac_expr in d_fd dd_fd; do
CFLAGS="$CFLAGS -DDIR_FD_MEMBER_NAME=$ac_expr"
- AC_TRY_COMPILE(
- [#include <sys/types.h>
- #include <dirent.h>],
- [DIR *dir_p = opendir("."); (void) dir_p->DIR_FD_MEMBER_NAME;],
- dir_fd_found=yes
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include <sys/types.h>
+ #include <dirent.h>]],
+ [[DIR *dir_p = opendir("."); (void) dir_p->DIR_FD_MEMBER_NAME;]])],
+ [dir_fd_found=yes]
)
CFLAGS=$dirfd_save_CFLAGS
test "$dir_fd_found" = yes && break
]
)
if test $gl_cv_sys_dir_fd_member_name != no_such_member; then
- AC_DEFINE_UNQUOTED(DIR_FD_MEMBER_NAME,
+ AC_DEFINE_UNQUOTED([DIR_FD_MEMBER_NAME],
$gl_cv_sys_dir_fd_member_name,
[the name of the file descriptor member of DIR])
fi