X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fd-ino.m4;h=aab82c2dfd7061f4ea0b6e84c286b9a27fb3a26b;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=213e0a1f299eac7ae06b0316a669c00b0accc418;hpb=f5d929cf56ee749b08fc3a049c1352ceaf8c5d86;p=gnulib.git

diff --git a/m4/d-ino.m4 b/m4/d-ino.m4
index 213e0a1f2..aab82c2df 100644
--- a/m4/d-ino.m4
+++ b/m4/d-ino.m4
@@ -1,11 +1,11 @@
-#serial 9
+# serial 13
 
 dnl From Jim Meyering.
 dnl
 dnl Check whether struct dirent has a member named d_ino.
 dnl
 
-# Copyright (C) 1997, 1999, 2000, 2001, 2003, 2004, 2006, 2007 Free Software
+# Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2013 Free Software
 # Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
@@ -13,30 +13,43 @@ dnl
 # 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_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+   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 $gl_cv_struct_dirent_d_ino = yes; then
-     AC_DEFINE(D_INO_IN_DIRENT, 1,
-       [Define if there is a member named d_ino in the struct describing
-        directory headers.])
-   fi
+        [AC_LANG_PROGRAM(
+           [[#include <sys/types.h>
+             #include <sys/stat.h>
+             #include <dirent.h>
+           ]],
+           [[DIR *dp = opendir (".");
+             struct dirent *e;
+             struct stat st;
+             if (! dp)
+               return 1;
+             e = readdir (dp);
+             if (! e)
+               return 2;
+             if (stat (e->d_name, &st) != 0)
+               return 3;
+             if (e->d_ino != st.st_ino)
+               return 4;
+             return 0;
+           ]])],
+           [gl_cv_struct_dirent_d_ino=yes],
+           [gl_cv_struct_dirent_d_ino=no],
+           [case "$host_os" in
+                           # Guess yes on glibc systems with Linux kernel.
+              linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;;
+                           # If we don't know, assume the worst.
+              *)           gl_cv_struct_dirent_d_ino="guessing no" ;;
+            esac
+           ])])
+   case "$gl_cv_struct_dirent_d_ino" in
+     *yes)
+       AC_DEFINE([D_INO_IN_DIRENT], [1],
+         [Define if struct dirent has a member d_ino that actually works.])
+       ;;
+   esac
   ]
 )