install-reloc: Support multi-binary installation.

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

diff --git a/m4/d-ino.m4 b/m4/d-ino.m4
index e4ea6ea..d093b3f 100644 (file)
--- a/m4/d-ino.m4
+++ b/m4/d-ino.m4
@@ -1,11 +1,11 @@
-# serial 11
+# serial 14
 
 dnl From Jim Meyering.
 dnl
 dnl Check whether struct dirent has a member named d_ino.
 dnl
 
-# Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009 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
@@ -13,7 +13,8 @@ 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],
+  [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(
@@ -27,15 +28,28 @@ AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO],
              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 $gl_cv_struct_dirent_d_ino = yes; then
-     AC_DEFINE([D_INO_IN_DIRENT], [1],
-       [Define if struct dirent has a member d_ino that actually works.])
-   fi
+             if (! e)
+               return 2;
+             if (lstat (e->d_name, &st) != 0)
+               return 3;
+             if (e->d_ino != st.st_ino)
+               return 4;
+             return 0;
+           ]])],
+           [gl_cv_struct_dirent_d_ino=yes],
+           [gl_cv_struct_dirent_d_ino=no],
+           [case "$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
   ]
 )