2 # See if we need to provide fdopendir.
4 dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
5 dnl This file is free software; the Free Software Foundation
6 dnl gives unlimited permission to copy and/or distribute it,
7 dnl with or without modifications, as long as this notice is preserved.
9 # Written by Eric Blake.
11 AC_DEFUN([gl_FUNC_FDOPENDIR],
13 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
14 dnl FreeBSD 7.3 has the function, but failed to declare it.
15 AC_CHECK_DECLS([fdopendir], [], [HAVE_DECL_FDOPENDIR=0], [[
18 AC_CHECK_FUNCS_ONCE([fdopendir])
19 if test $ac_cv_func_fdopendir = no; then
20 AC_LIBOBJ([openat-proc])
21 AC_LIBOBJ([fdopendir])
25 AC_CACHE_CHECK([whether fdopendir works],
26 [gl_cv_func_fdopendir_works],
27 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
31 #if !HAVE_DECL_FDOPENDIR
32 extern DIR *fdopendir (int);
35 int fd = open ("conftest.c", O_RDONLY);
36 if (fd < 0) result |= 1;
37 if (fdopendir (fd)) result |= 2;
38 if (close (fd)) result |= 4;
40 [gl_cv_func_fdopendir_works=yes],
41 [gl_cv_func_fdopendir_works=no],
42 [gl_cv_func_fdopendir_works="guessing no"])])
43 if test "$gl_cv_func_fdopendir_works" != yes; then
46 AC_LIBOBJ([fdopendir])