striconveh: Simplify last commit.

[gnulib.git] / m4 / d-ino.m4

diff --git a/m4/d-ino.m4 b/m4/d-ino.m4
index 56614ff..b019ae5 100644 (file)
--- a/m4/d-ino.m4
+++ b/m4/d-ino.m4
@@ -1,40 +1,41 @@
-#serial 1
+# serial 11
 
 dnl From Jim Meyering.
 dnl
 dnl Check whether struct dirent has a member named d_ino.
 dnl
 
-AC_DEFUN(jm_STRUCT_DIRENT_D_INO,
-  [AC_REQUIRE([AC_HEADER_DIRENT])dnl
-   AC_CACHE_CHECK([for d_ino member in directory struct],
-                 jm_cv_struct_dirent_d_ino,
-     [AC_TRY_LINK(dnl
-       [
-#include <sys/types.h>
-#ifdef HAVE_DIRENT_H
-# include <dirent.h>
-#else /* not HAVE_DIRENT_H */
-# define dirent direct
-# ifdef HAVE_SYS_NDIR_H
-#  include <sys/ndir.h>
-# endif /* HAVE_SYS_NDIR_H */
-# ifdef HAVE_SYS_DIR_H
-#  include <sys/dir.h>
-# endif /* HAVE_SYS_DIR_H */
-# ifdef HAVE_NDIR_H
-#  include <ndir.h>
-# endif /* HAVE_NDIR_H */
-#endif /* HAVE_DIRENT_H */
-       ],
-       [struct dirent dp; dp.d_ino = 0;],
+# Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2010 Free Software
+# Foundation, Inc.
 
-       jm_cv_struct_dirent_d_ino=yes,
-       jm_cv_struct_dirent_d_ino=no)
-     ]
-   )
-   if test $jm_cv_struct_dirent_d_ino = yes; then
-     AC_DEFINE(D_INO_IN_DIRENT)
+# 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_CHECK_TYPE_STRUCT_DIRENT_D_INO],
+  [AC_CACHE_CHECK([for d_ino member in directory struct],
+                  gl_cv_struct_dirent_d_ino,
+     [AC_RUN_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#include <sys/types.h>
+             #include <sys/stat.h>
+             #include <dirent.h>
+           ]],
+           [[DIR *dp = opendir (".");
+             struct dirent *e;
+             struct stat st;
+             if (! dp)
+               return 1;
+             e = readdir (dp);
+             return ! (e
+                       && stat (e->d_name, &st) == 0
+                       && e->d_ino == st.st_ino);]])],
+            [gl_cv_struct_dirent_d_ino=yes],
+            [gl_cv_struct_dirent_d_ino=no],
+            [gl_cv_struct_dirent_d_ino=no])])
+   if test $gl_cv_struct_dirent_d_ino = yes; then
+     AC_DEFINE([D_INO_IN_DIRENT], [1],
+       [Define if struct dirent has a member d_ino that actually works.])
    fi
   ]
 )