From 05a607c7c9f6727f52ae26f32e66cba8ad26fb45 Mon Sep 17 00:00:00 2001
From: Andreas Lauser <and@poware.org>
Date: Tue, 8 Jul 2014 11:57:19 +0200
Subject: [PATCH] use extended regular expressions in the test for std::regex

for some compilers (e.g., GCC < 4.9) the default is buggy and
opm-parser thus uses extended expressions...

thanks to [at]bska for digging this up!
---
 cmake/Modules/FindCXX11Features.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmake/Modules/FindCXX11Features.cmake b/cmake/Modules/FindCXX11Features.cmake
index b51f0a8f3..9697cc79e 100644
--- a/cmake/Modules/FindCXX11Features.cmake
+++ b/cmake/Modules/FindCXX11Features.cmake
@@ -133,7 +133,7 @@ CHECK_CXX_SOURCE_RUNS("
     #include <regex>
     int main(void)
     {
-      std::regex r(\"AB.*|BC+\");
+      std::regex r(\"AB.*|BC+\", std::regex::extended);
       if (!std::regex_match(\"AB\", r))
            return 1;
       if (!std::regex_match(\"ABC\", r))