--- a/cmake/pack/CMakeLists.txt
+++ b/cmake/pack/CMakeLists.txt
@@ -36,7 +36,7 @@
 ADD_DEFINITIONS("-Wundef")
 ADD_DEFINITIONS("-Wcast-align")
 ADD_DEFINITIONS("-Wno-implicit-function-declaration")
-ADD_DEFINITIONS("-O3 -march=native -std=c99")
+ADD_DEFINITIONS("-std=c99")
 INCLUDE_DIRECTORIES (${SRC_DIR})
 
 
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -99,7 +99,7 @@
 ADD_DEFINITIONS("-Wundef")
 ADD_DEFINITIONS("-Wcast-align")
 ADD_DEFINITIONS("-Wno-implicit-function-declaration")
-ADD_DEFINITIONS("-Os -march=native -std=c99")
+ADD_DEFINITIONS("-std=c99")
 INCLUDE_DIRECTORIES (${SRC_DIR})