cmake 递归依赖

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现在有3个模块：main、service、base，main依赖service的service.h、service依赖base的base.h，怎么写CMakeList.txt避免main直接耦合base

- main

- service

- base

base模块

- base.h

- base.cpp

- CMakeLists.txt

//base/base.h #ifndef BASE_H
#define BASE_H void hello_base(); #endif //BASE_H

//base/base.cpp #include "base.h"
#include <stdio.h> void hello_base()
{
printf("hello base\n");
}

#base/CMakeLists.txt

cmake_minimum_required(VERSION 3.12) set(HEADER_LIST base.h)
set(SOURCE_LIST base.cpp) file(COPY ${HEADER_LIST} DESTINATION ".") add_library(base ${HEADER_LIST} ${SOURCE_LIST})

file(COPY ${HEADER_LIST} DESTINATION ".")

主要是为了把头文件做为一个编译输出，方便下面的使用

service 模块

- service.h

- service.cpp

- CMakeLists.txt

//service/service.h #ifndef SERVICE_H
#define SERVICE_H
#include "base.h" //用来测试main模块是否能找到base.h，正常尽量在源文件内包含头文件 void hello_service(); #endif //SERVICE_H

//service/service.cpp #include "service.h"
#include <stdio.h> void hello_service()
{
printf("hello service\n");
hello_base();
}

#service/CMakeLists.txt

cmake_minimum_required(VERSION 3.12) set(SOURCE_LIST service.cpp)
set(HEADER_LIST service.h) add_subdirectory(${CMAKE_SOURCE_DIR}/../base base.output)
include_directories(base.output) file(COPY ${HEADER_LIST} DESTINATION ".") add_library(service ${HEADER_LIST} ${SOURCE_LIST}) add_dependencies(service base)
target_link_libraries(service base)

add_subdirectory(${CMAKE_SOURCE_DIR}/../base base.output)

将base模块的输出base.h、libbase.a放到当前目录的base.output下

main 模块

- main.cpp

- CMakeLists.txt

//main/main.cpp #include "service.h" int main(int argc, const char* argv[])
{
hello_service();
return ;
}

#main/CMakeLists.txt

cmake_minimum_required(VERSION 3.12) project(main)
set(SOURCE_LIST main.cpp) add_subdirectory(${CMAKE_SOURCE_DIR}/../service service.output) file(GLOB_RECURSE INC_PATH *.h)
foreach(DIR ${INC_PATH})
STRING(REGEX REPLACE "/[a-z,A-Z,0-9,_,.]+$" "" dirName ${DIR})
include_directories(${dirName})
endforeach() add_executable(main ${SOURCE_LIST} ${HEADER_LIST}) add_dependencies(main service)
target_link_libraries(main service)