--- CMakeLists.txt~	2019-09-25 15:43:34.000000000 -0500
+++ CMakeLists.txt	2020-01-31 09:26:24.104743210 -0600
@@ -302,7 +302,7 @@
 ENDIF()
 
 IF(CMAKE_COMPILER_IS_GNUCC)
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -fcommon")
   IF(NOT(ANDROID OR BLACKBERRY OR FREEGLUT_WAYLAND))
     # not setting -ansi as EGL/KHR headers doesn't support it
     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pedantic")