1 files changed, 61 insertions, 0 deletions
diff --git a/cmake/regex-checks.cmake b/cmake/regex-checks.cmake
new file mode 100644
index 00000000..366240b4
--- /dev/null
+++ b/cmake/regex-checks.cmake
@@ -0,0 +1,61 @@
+include(CheckCXXSourceRuns)
+#regex
+check_cxx_source_runs(
+"#include <regex>
+
+int main() {
+  std::regex foo(\"^foo[bar]\$\");
+  std::regex bar(\"^foo[bar]\$\", std::regex::extended);
+  std::regex check(\"^[^:/,.][^:/,]*\$\", std::regex::extended);
+}"
+STD_REGEX)
+
+# regex broken
+check_cxx_source_runs(
+"#include <regex>
+
+int main() {
+  std::regex foo(\"^foo[bar]\$\");
+  std::regex bar(\"^foo[bar]\$\", std::regex::extended);
+}"
+STD_REGEX_BROKEN)
+
+# tr1 regex
+check_cxx_source_runs(
+"#include <tr1/regex>
+
+int main() {
+  std::tr1::regex foo(\"^foo[bar]\$\");
+  std::tr1::regex bar(\"^foo[bar]\$\", std::tr1::regex::extended);
+  std::tr1::regex check(\"^[^:/,.][^:/,]*\$\", std::tr1::regex::extended);
+}"
+TR1_REGEX)
+
+# tr1 regex broken
+check_cxx_source_runs(
+"#include <tr1/regex>
+
+int main() {
+  std::tr1::regex foo(\"^foo[bar]\$\");
+  std::tr1::regex bar(\"^foo[bar]\$\", std::tr1::regex::extended);
+}"
+TR1_REGEX_BROKEN)
+
+# boost regex
+SET(CMAKE_REQUIRED_LIBRARIES_SAVE ${CMAKE_REQUIRED_LIBRARIES})
+SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${Boost_REGEX_LIBRARY_RELEASE})
+check_cxx_source_runs(
+"#include <boost/regex.hpp>
+
+int main() {
+  boost::regex(\"^foo[bar]\$\");
+  boost::regex bar(\"^foo[bar]\$\", boost::regex::extended);
+}"
+BOOST_REGEX)
+SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES_SAVE})
+
+if(NOT STD_REGEX OR NOT STD_REGEX_BROKEN)
+  if(NOT TR1_REGEX OR NOT TR1_REGEX_BROKEN)
+    set(REGEX_LIBRARY ${Boost_REGEX_LIBRARY_RELEASE})
+  endif(NOT TR1_REGEX OR NOT TR1_REGEX_BROKEN)
+endif(NOT STD_REGEX OR NOT STD_REGEX_BROKEN)