diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a3531908c61956c2b704d18deebda17da9f0d71..6f50aca0797cb2d3a2b61796d43137fb417f76ee 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,10 +42,12 @@ INCLUDE(cmake/env.inc)
 INCLUDE(cmake/version.inc)
 INCLUDE(cmake/install.inc)
 
-#set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -pipe -Wall -Wshadow -Wextra -Werror")
-#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pipe -Wall -Wshadow -Wextra -Werror")
-set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -pipe -Wall -Wshadow -Werror")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pipe -Wall -Wshadow -Werror")
+IF (CMAKE_SYSTEM_NAME MATCHES "Linux")
+  SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -pipe -Wall -Wshadow -Werror")
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pipe -Wall -Wshadow -Werror")
+ENDIF ()
+MESSAGE(STATUS "CMAKE_C_FLAGS:   ${CMAKE_C_FLAGS}")
+MESSAGE(STATUS "CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
 
 ADD_SUBDIRECTORY(deps)
 ADD_SUBDIRECTORY(src)