From: Simon Josefsson <simon@josefsson.org>
Date: Wed, 21 May 2008 09:07:36 +0000 (+0200)
Subject: When cross-compiling, assume memcmp works if it is declared.
X-Git-Tag: v0.1~7372
X-Git-Url: http://erislabs.org.uk/gitweb/?a=commitdiff_plain;h=a0092d82930eaf9bcbdf1840b2133e24997d2311;p=gnulib.git

When cross-compiling, assume memcmp works if it is declared.
---

diff --git a/ChangeLog b/ChangeLog
index b4ac63656..7b1b86af2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-05-21  Simon Josefsson  <simon@josefsson.org>
+
+	* m4/memcmp.m4: When cross-compiling, assume memcmp works if it is
+	declared.
+
 2008-05-20  Bruno Haible  <bruno@clisp.org>
 
 	* tests/test-memcmp.c (main): Test also the sign of the result. Test
diff --git a/m4/memcmp.m4 b/m4/memcmp.m4
index 099b141b2..a8d87b930 100644
--- a/m4/memcmp.m4
+++ b/m4/memcmp.m4
@@ -1,11 +1,23 @@
-# memcmp.m4 serial 12
-dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+# memcmp.m4 serial 13
+dnl Copyright (C) 2002, 2003, 2004, 2007, 2008 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_MEMCMP],
 [
+  if test $cross_compiling != no; then
+    # AC_FUNC_MEMCMP as of 2.62 defaults to 'no' when cross compiling.
+    # We default to yes if memcmp appears to exist, which works
+    # better for MinGW.
+    AC_CACHE_CHECK([whether cross-compiling target has memcmp],
+                   [ac_cv_func_memcmp_working],
+                   [AC_LINK_IFELSE([
+			AC_LANG_PROGRAM([[#include <string.h>
+				]], [[int ret = memcmp ("foo", "bar", 0);]])],
+			[ac_cv_func_memcmp_working=yes],
+			[ac_cv_func_memcmp_working=no])])
+  fi 
   AC_FUNC_MEMCMP
   dnl Note: AC_FUNC_MEMCMP does AC_LIBOBJ(memcmp).
   if test $ac_cv_func_memcmp_working = no; then