diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2560c6498f..135bfacb7c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,10 @@ IF (WIN32)
     include_directories(SYSTEM "externals/winsdk")
     add_definitions( -DNOMINMAX -D_CRT_SECURE_NO_WARNINGS )
     set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} "C:\\Program Files\\Microsoft SDKs\\Windows\\v7.1 ")
+ELSEIF (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+    #SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-long-long -pedantic")
+    #SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unknown-pragmas")
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 ENDIF(WIN32)
 
 set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} $ENV{QT_CMAKE_PREFIX_PATH} )