X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstrndup.m4;h=4fa7d5a7c9356c170a8af76dce4ccfad95aacf7f;hb=0a3f7af426469ab51370585e1a3afba66ff24b57;hp=1d112ae5ec4ddaaf72cb8fc83930596fc7fc1f53;hpb=b90eddc3542d88ab8a2501a8c850c16f74130326;p=gnulib.git

diff --git a/m4/strndup.m4 b/m4/strndup.m4
index 1d112ae5e..4fa7d5a7c 100644
--- a/m4/strndup.m4
+++ b/m4/strndup.m4
@@ -1,22 +1,25 @@
-# strndup.m4 serial 6
-dnl Copyright (C) 2002-2003, 2005-2006 Free Software Foundation, Inc.
+# strndup.m4 serial 16
+dnl Copyright (C) 2002-2003, 2005-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_FUNC_STRNDUP],
 [
-  AC_LIBSOURCES([strndup.c, strndup.h])
-
   dnl Persuade glibc <string.h> to declare strndup().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
   AC_CHECK_DECLS_ONCE([strndup])
+  if test $ac_cv_have_decl_strndup = no; then
+    HAVE_DECL_STRNDUP=0
+  fi
 
-  # AIX 5.1 fails to add the terminating '\0'.
-  AC_CACHE_CHECK([for working strndup], gl_cv_func_strndup,
+  # AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'.
+  AC_CACHE_CHECK([for working strndup], [gl_cv_func_strndup],
     [AC_RUN_IFELSE([
-       AC_LANG_PROGRAM([#include <string.h>], [[
+       AC_LANG_PROGRAM([[#include <string.h>
+			 #include <stdlib.h>]], [[
 #ifndef HAVE_DECL_STRNDUP
   extern char *strndup (const char *, size_t);
 #endif
@@ -27,20 +30,21 @@ AC_DEFUN([gl_FUNC_STRNDUP],
   return s[13] != '\0';]])],
        [gl_cv_func_strndup=yes],
        [gl_cv_func_strndup=no],
-       [AC_EGREP_CPP([too risky], [
+       [AC_CHECK_FUNC([strndup],
+          [AC_EGREP_CPP([too risky], [
 #ifdef _AIX
-            too risky
+               too risky
 #endif
-          ],
-          [gl_cv_func_strndup=no],
-          [gl_cv_func_strndup=yes])])])
+             ],
+             [gl_cv_func_strndup=no],
+             [gl_cv_func_strndup=yes])],
+          [gl_cv_func_strndup=no])])])
   if test $gl_cv_func_strndup = yes; then
-    AC_DEFINE([HAVE_STRNDUP], 1,
+    AC_DEFINE([HAVE_STRNDUP], [1],
       [Define if you have the strndup() function and it works.])
   else
+    HAVE_STRNDUP=0
     AC_LIBOBJ([strndup])
-    AC_DEFINE(strndup, rpl_strndup,
-      [Define to rpl_strndup if the replacement function should be used,])
     gl_PREREQ_STRNDUP
   fi
 ])