X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffdopendir.m4;h=0ffb7fbbeb62d8b5b3656040f7873aa1bab28da3;hb=dfbec8be94ca116ce40c04f88302329505dbb745;hp=09670bb43e6502a87e9d218dd89b4e3c3084c623;hpb=d1aa3e40286ed2b0ad1045b326a37167ac5d8847;p=gnulib.git

diff --git a/m4/fdopendir.m4 b/m4/fdopendir.m4
index 09670bb43..0ffb7fbbe 100644
--- a/m4/fdopendir.m4
+++ b/m4/fdopendir.m4
@@ -1,4 +1,4 @@
-# serial 1
+# serial 2
 # See if we need to provide fdopendir.
 
 dnl Copyright (C) 2009 Free Software Foundation, Inc.
@@ -17,5 +17,22 @@ AC_DEFUN([gl_FUNC_FDOPENDIR],
     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.h", 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
 ])