--- gccxml/GCC/CMakeLists.txt	2017-04-05 11:25:32.000000000 +0200
+++ gccxml/GCC/CMakeLists.txt	2017-04-05 11:25:47.000000000 +0200
@@ -19,7 +19,7 @@ SET(LIBRARY_OUTPUT_PATH "${GCC_BINARY_DI
 SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
 
 IF(APPLE AND CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang)$")
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -no-cpp-precomp")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
 ENDIF()
 
 IF(CMAKE_C_COMPILER_ID MATCHES "^(Clang)$")