+# serial 3
+# See if we need to provide fdopendir.
+
+dnl Copyright (C) 2009-2010 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_FDOPENDIR],
+[
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_FUNCS_ONCE([fdopendir])
+ if test $ac_cv_func_fdopendir = no; then
+ AC_LIBOBJ([openat-proc])
+ AC_LIBOBJ([fdopendir])
+ gl_REPLACE_DIRENT_H
+ HAVE_FDOPENDIR=0
+ else
+ AC_CACHE_CHECK([whether fdopendir works],
+ [gl_cv_func_fdopendir_works],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <dirent.h>
+#include <fcntl.h>
+]], [int fd = open ("conftest.c", O_RDONLY);
+ if (fd < 0) return 2;
+ return !!fdopendir (fd);])],
+ [gl_cv_func_fdopendir_works=yes],
+ [gl_cv_func_fdopendir_works=no],
+ [gl_cv_func_fdopendir_works="guessing no"])])
+ if test "$gl_cv_func_fdopendir_works" != yes; then
+ REPLACE_FDOPENDIR=1
+ gl_REPLACE_DIRENT_H
+ AC_LIBOBJ([fdopendir])
+ fi
+ fi
+])