--- glm/CMakeLists.txt.orig	2018-05-07 14:23:01.000000000 +0200
+++ glm/CMakeLists.txt	2018-07-15 13:23:19.253074479 +0200
@@ -143,7 +143,6 @@
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
 	message("GLM: GCC - ${CMAKE_CXX_COMPILER_ID} compiler")
 
-	add_compile_options(-O2)
 	add_compile_options(-Wno-long-long)
 
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")