$OpenBSD: patch-CMakeLists_txt,v 1.4 2012/08/12 17:19:47 jasper Exp $

Don't clobber CFLAGS.
-Wextra is not available with gcc < 4.

--- CMakeLists.txt.orig	Mon Jul 23 09:41:36 2012
+++ CMakeLists.txt	Mon Jul 23 09:42:22 2012
@@ -70,7 +70,7 @@ IF (MSVC)
 
    # Precompiled headers
 ELSE ()
-	SET(CMAKE_C_FLAGS "-O2 -g -D_GNU_SOURCE -fvisibility=hidden -Wall -Wextra -Wno-missing-field-initializers -Wstrict-aliasing=2 -Wstrict-prototypes -Wmissing-prototypes ${CMAKE_C_FLAGS}")
+	SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -g -D_GNU_SOURCE -fvisibility=hidden -Wall -Wno-missing-field-initializers -Wstrict-aliasing=2 -Wstrict-prototypes -Wmissing-prototypes ${CMAKE_C_FLAGS}")
 	SET(CMAKE_C_FLAGS_DEBUG "-O0 -g")
 	IF (NOT MINGW) # MinGW always does PIC and complains if we tell it to
 		SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
