有些c++旧项目用Makefile，要迁移CMake的时候非常痛苦，有些像static pattern的语法和make自带命令 cmake要重写一套非常的麻烦。
因此这里用trick的方法实现了一种include makefile的方法。
# trick to include raw makefile FILE(WRITE ${CMAKE_BINARY_DIR}/.cmake_dummy.c "int main(void){return 0;}\n") function(INCLUDE_MAKEFILE tg mkfile) STRING(CONCAT OTPT ${tg} .out) ADD_CUSTOM_COMMAND( OUTPUT ${OTPT} COMMAND ${CMAKE_COMMAND} -E touch ${OTPT} COMMAND ${CMAKE_COMMAND} -E echo ‘include ${mkfile}‘ >> ${CMAKE_SOURCE_DIR}/Makefile ) ADD_EXECUTABLE(${tg} ${CMAKE_BINARY_DIR}/.cmake_dummy.c ${OTPT}) endfunction() # remember to execute `make ${target}` first to active makefile including # for example : make rocksdbjni INCLUDE_MAKEFILE(rocksdbjni ${CMAKE_SOURCE_DIR}/rocksdbjni.mk)
大致就是创建一个target用于执行将 include makefile 的语句追加到Makefile 。比较麻烦的是目前 include要手动激活，比如上述示例，cmake . 完后需要 make rocksdbjni 来激活这个target对应的include。当然实在不行也可以考虑加一个execute_process到最后触发一个后台延迟去代码激活的方法来省去还要make target这一步。。
