CMake系列（八） CMake 多级目录

CMake系列（八） CMake 多级目录

---

目录结构

├── app
│   ├── app1
│   │   ├── app1.c
│   │   ├── app1.h
│   │   └── CMakeLists.txt
│   ├── app2
│   │   ├── app2.c
│   │   ├── app2.h
│   │   └── CMakeLists.txt
│   ├── app3
│   │   ├── app3.c
│   │   ├── app3.h
│   │   └── CMakeLists.txt
│   └── CMakeLists.txt
├── CMakeLists.txt
├── include
│   └── Static.h
├── lib
│   └── libhello_library.a
├── main
│   ├── CMakeLists.txt
│   └── main.c
└── public
	├── CMakeLists.txt
	├── public1
   	│   ├── CMakeLists.txt
	│   ├── public1.c
	│   └── public1.h
	└── public2
    	├── CMakeLists.txt
    	├── public2.c
    	└── public2.h

结构说明

---

app目录存放应用层代码
public中存放公共代码
main中存放主函数代码
lib中存放三方静态库（本节使用CMake系列（三） CMake编译出静态库和动态库并使用产生的静态库）
include存放三方库需要用到的头文件

调用关系

		├──app1.c
		│	
		├──app2.c
		│	└──public2.c
		│	
		├──app3.c
		│	└──libstatic_library.a
main.c──│	
		├──public1.c
		│	
		├──public2.c
		│
		└──libstatic_library.a

源文件

main.c

#include "app1.h"
#include "app2.h"
#include "app3.h"
#include "public1.h"
#include "public2.h"
#include "Static.h"

int main(int argc, char *argv[])
{
	printf("main: cmake\r\n");
	App1_print();
	App2_print();
	App3_print();
	Public1_print();
	Public2_print();
	Static_print();
	printf("main: end\r\n");
    return 0;
}

app1.c

#include "app1.h"

void App1_print(void)
{
    printf("app1: cmake\r\n");
    printf("app1: end\r\n");
}

app2.c

#include "app2.h"
#include "public2.h"

void App2_print(void)
{
    printf("app2: cmake\r\n");
    Public2_print();
    printf("app2: end\r\n");
}

app3.c

#include "app3.h"
#include "Static.h"

void App3_print(void)
{
    printf("app3: cmake\r\n");
    Static_print();
    printf("app3: end\r\n");
}

public1.c

#include "public1.h"

void Public1_print(void)
{
    printf("public1: cmake\r\n");
    printf("public1: end\r\n");
}

public2.c

#include "public2.h"
void Public2_print(void)
{
    printf("public2: cmake\r\n");
    printf("public2: end\r\n");
}

CMakeLists.txt

最外层CMakeLists

cmake_minimum_required(VERSION 3.5)

project(subprojects)

# Add sub directories
# 定义子目录src，用以递归的调用src中的MakeLists.txt
add_subdirectory(public)
add_subdirectory(app)
add_subdirectory(main)

最后三行，使用add_subdirectory调用子目录的MakeLists.txt

main的CMakeLists

project(main)

# Create the executable
add_executable(${PROJECT_NAME} main.c)

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${subprojects_SOURCE_DIR}/include
)
#link_directories( ${subprojects_SOURCE_DIR}/lib )

# Link the static library from subproject1 using it's alias sub::lib1
# Link the header only library from subproject2 using it's alias sub::lib2
# This will cause the include directories for that target to be added to this project
target_link_libraries(${PROJECT_NAME}
    lib::app1
    lib::app2
    lib::app3
    lib::public1
    lib::public2
    ${subprojects_SOURCE_DIR}/lib/libstatic_library.a
)

最后一行使用target_link_libraries 连接其他文件。

app的CMakeLists

#定义子目录
add_subdirectory(app1)
add_subdirectory(app2)
add_subdirectory(app3)
)

app1的CMakeLists

# Set the project name
project (app1)
# Add a library with the above sources
add_library(${PROJECT_NAME} app1.c)
add_library(lib::app1 ALIAS ${PROJECT_NAME})

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${PROJECT_SOURCE_DIR}
)

app2的CMakeLists

# Set the project name
project (app2)
# Add a library with the above sources
add_library(${PROJECT_NAME} app2.c)
add_library(lib::app2 ALIAS ${PROJECT_NAME})

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${PROJECT_SOURCE_DIR}
)

target_link_libraries(${PROJECT_NAME}
    lib::public2
)

app3的CMakeLists

# Set the project name
project (app3)
# Add a library with the above sources
add_library(${PROJECT_NAME} app3.c)
add_library(lib::app3 ALIAS ${PROJECT_NAME})

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${PROJECT_SOURCE_DIR}
    	   ${subprojects_SOURCE_DIR}/include
)

target_link_libraries(${PROJECT_NAME}
    ${subprojects_SOURCE_DIR}/lib/libstatic_library.a
)

public的CMakeLists

#定义子目录
add_subdirectory(public1)
add_subdirectory(public2)
)

public1的CMakeLists

# Set the project name
project (public1)

# Add a library with the above sources
add_library(${PROJECT_NAME} public1.c)
add_library(lib::public1 ALIAS ${PROJECT_NAME})

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${PROJECT_SOURCE_DIR}
)

public2的CMakeLists

# Set the project name
project (public2)

# Add a library with the above sources
add_library(${PROJECT_NAME} public2.c)
add_library(lib::public2 ALIAS ${PROJECT_NAME})

target_include_directories( ${PROJECT_NAME}
    PUBLIC ${PROJECT_SOURCE_DIR}
)

编译

	$  mkdir build
	$  cd build/
	$  cmake .. 
	$  make
	$  cd main
	./main
	main: cmake
	app1: cmake
	app1: end
	app2: cmake
	public2: cmake
	public2: end
	app2: end
	app3: cmake
	static hello: cmake
	app3: end
	public1: cmake
	public1: end
	public2: cmake
	public2: end
	static hello: cmake
	main: end