Remove cmake's dependence on CXX

CMakeLists.txt

@@ -24,15 +24,11 @@ ENDIF ()
 
 #set debug & release related options
 SET(COMMON_FLAGS "-std=gnu99 -Wall -fPIC -malign-double -Wno-char-subscripts -malign-stringops -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
-SET(COMMON_CXX_FLAGS "${COMMON_FLAGS} -std=c++11")
 SET(DEBUG_FLAGS "-O0 -DDEBUG")
 
 #compiler debug options
 SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMMON_FLAGS} ${DEBUG_FLAGS}")
-SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMMON_CXX_FLAGS} ${DEBUG_FLAGS}")
-
 SET(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${COMMON_FLAGS}")
-SET(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${COMMON_CXX_FLAGS}")
 
 MESSAGE(STATUS "Project source directory: " ${PROJECT_SOURCE_DIR})