NEWS.stable: update

[gnulib.git] / m4 / canonicalize.m4

diff --git a/m4/canonicalize.m4 b/m4/canonicalize.m4
index d418de8..c08a786 100644 (file)
--- a/m4/canonicalize.m4
+++ b/m4/canonicalize.m4
@@ -1,6 +1,6 @@
-# canonicalize.m4 serial 16
+# canonicalize.m4 serial 21
 
-dnl Copyright (C) 2003-2007, 2009-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2003-2007, 2009-2011 Free Software Foundation, Inc.
 
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -26,6 +26,7 @@ AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
 # Provides canonicalize_file_name and realpath.
 AC_DEFUN([gl_CANONICALIZE_LGPL],
 [
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
   AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
   if test $ac_cv_func_canonicalize_file_name = no; then
     HAVE_CANONICALIZE_FILE_NAME=0
@@ -43,7 +44,7 @@ AC_DEFUN([gl_CANONICALIZE_LGPL],
 ])
 
 # Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
-# (no AC_LIBOBJ).
+# (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
 AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
 [
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
@@ -61,17 +62,40 @@ AC_DEFUN([gl_FUNC_REALPATH_WORKS],
   AC_CHECK_FUNCS_ONCE([realpath])
   AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
     touch conftest.a
+    mkdir conftest.d
     AC_RUN_IFELSE([
       AC_LANG_PROGRAM([[
+        ]GL_NOCRASH[
         #include <stdlib.h>
+        #include <string.h>
       ]], [[
-        char *name1 = realpath ("conftest.a", NULL);
-        char *name2 = realpath ("conftest.b/../conftest.a", NULL);
-        char *name3 = realpath ("conftest.a/", NULL);
-        return !(name1 && *name1 == '/' && !name2 && !name3);
+        int result = 0;
+        {
+          char *name = realpath ("conftest.a", NULL);
+          if (!(name && *name == '/'))
+            result |= 1;
+        }
+        {
+          char *name = realpath ("conftest.b/../conftest.a", NULL);
+          if (name != NULL)
+            result |= 2;
+        }
+        {
+          char *name = realpath ("conftest.a/", NULL);
+          if (name != NULL)
+            result |= 4;
+        }
+        {
+          char *name1 = realpath (".", NULL);
+          char *name2 = realpath ("conftest.d//./..", NULL);
+          if (strcmp (name1, name2) != 0)
+            result |= 8;
+        }
+        return result;
       ]])
     ], [gl_cv_func_realpath_works=yes], [gl_cv_func_realpath_works=no],
        [gl_cv_func_realpath_works="guessing no"])
+    rm -rf conftest.a conftest.d
   ])
   if test "$gl_cv_func_realpath_works" = yes; then
     AC_DEFINE([FUNC_REALPATH_WORKS], [1], [Define to 1 if realpath()