From 0a283a8f0002316bde12c9164e8397feb0529e3c Mon Sep 17 00:00:00 2001
From: Beman Dawes <bdawes@acm.org>
Date: Thu, 13 Sep 2007 21:47:25 +0000
Subject: [PATCH] Ensure error_category::operator< test works regardless of how
 compiler lays out memory.

[SVN r39248]
---
 test/error_code_test.cpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/test/error_code_test.cpp b/test/error_code_test.cpp
index b020ef0..0206ea1 100644
--- a/test/error_code_test.cpp
+++ b/test/error_code_test.cpp
@@ -24,6 +24,7 @@
 #include <sstream>
 #include <string>
 #include <cstring>
+#include <functional>
 #include <boost/cerrno.hpp>
 
 //  Although using directives are not the best programming practice, testing
@@ -66,8 +67,18 @@ int test_main( int, char ** )
   BOOST_CHECK( system_category == system_category );
   BOOST_CHECK( posix_category != system_category );
   BOOST_CHECK( system_category != posix_category );
-  BOOST_CHECK( posix_category < system_category );
-  BOOST_CHECK( !(system_category < posix_category) );
+
+  if ( std::less<const error_category*>()( &posix_category, &system_category ) )
+  {
+    BOOST_CHECK( posix_category < system_category );
+    BOOST_CHECK( !(system_category < posix_category) );
+  }
+  else
+  {
+    BOOST_CHECK( system_category < posix_category );
+    BOOST_CHECK( !(posix_category < system_category) );
+  }
+
 
   error_code ec;
   error_condition dec;