--- src/cmake/config/linux-gcc.txt.orig	2016-03-29 16:02:26 UTC
+++ src/cmake/config/linux-gcc.txt
@@ -119,12 +119,6 @@ if (HIDE_SYMBOLS)
     )
 endif ()
 
-# Release configuration.
-set (c_compiler_flags_release
-    -O3                                                 # optimization level
-)
-
-
 #--------------------------------------------------------------------------------------------------
 # Libraries.
 #--------------------------------------------------------------------------------------------------
