+#define BOOST_SIGNALS_NO_DEPRECATION_WARNING 1
+
+// <regex> in gcc is unusable in versions less than 4.9.0
+// see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53631
+// clang defines __GNUC__ but how do the versions match?
+// disabled because of missing match_partial
+//#ifndef LYX_USE_STD_REGEX
+//# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 9) || __GNUC__ > 4 || defined(USE_LLVM_LIBCPP)
+//# define LYX_USE_STD_REGEX
+//# endif
+//#endif