X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=configure.ac;h=30694a6bbbe3dd0d71029ad32a07f966a7c3f21f;hb=07e8f2e1bcbe5f747efc1c27f11025b397847963;hp=8f56125a560484ee34639f59e1050915d5820cba;hpb=cc0e5b1fc142b4c92419b0aebd37f3299bf4f526;p=lyx.git

diff --git a/configure.ac b/configure.ac
index 8f56125a56..30694a6bbb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -289,6 +289,13 @@ char * strerror(int n);
 #define BOOST_NO_WREGEX 1
 #define BOOST_NO_WSTRING 1
 
+// TR1 regex not supported in GCC <= 4.5
+#ifndef LYX_USE_TR1
+#  if __GNUC__ == 4 
+#    define LYX_USE_TR1
+#  endif
+#endif
+
 #ifdef __CYGWIN__
 #  define NOMINMAX
 #  define BOOST_POSIX 1