update cmakelists

toolkits/CMakeLists.txt

@@ -1,9 +1,14 @@
 # 设置编译选项
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
-if(WIN32)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
-else()
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11 -O2")
+if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
+endif()
+
+if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -lm -O2")
+endif()
+
+if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Darwin")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
 endif()
 
 # 设置可执行文件的输出地址