CMake 創建靜態庫及動態庫供函數調用

CMake 創建靜態庫及動態庫供函數調用，下面是項目的樹狀圖

.
├── cmake_fei
│   ├── build
│   ├── CMakeLists.txt
│   ├── doc
│   │   ├── readme.txt
│   │   └── CMakeLists.txt
│   ├── libhello
│   │   ├── CMakeLists.txt
│   │   ├── hello.c
│   │   └── hello.h
│   └── src
│       ├── CMakeLists.txt
│       └── main.c
├── cmake_fei_lib
│   ├── build
│   ├── CMakeLists.txt
│   └── libmathfei
│       ├── CMakeLists.txt
│       ├── mathfei.c
│       └── mathfei.h

 

首先介紹下面的cmake_fei_lib項目，這個項目主要是生成一個math動態庫

CMakeLists.txt內容如下:

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(MATHFEI)
ADD_SUBDIRECTORY(libmathfei)

libmathfei下面的CMakeLists.txt內容如下：

SET(LIB_SRC mathfei.c)
ADD_DEFINITIONS("-DLIBEVEN_BUILD")
SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

#dynamic library
ADD_LIBRARY(libmathfei SHARED ${LIB_SRC})

#static library
#ADD_LIBRARY(libmathfei  ${LIB_SRC})

set_target_properties(libmathfei PROPERTIES OUTPUT_NAME "mathfei")

#install command is executed when "sudo make install"
install(TARGETS libmathfei DESTINATION /usr/lib)
#attention, don't create new folder in /usr/lib, just put libmathfei.so in /usr/lib directlly'
install(FILES ${CMAKE_SOURCE_DIR}/libmathfei/mathfei.h DESTINATION /usr/include/mathfei)

 

mathfei.c

#include <stdio.h>
#include "mathfei.h"

int mathfei_is_even(int number)
{
	int value = !(number%2);
	return value;
}

mathfei.h

#ifndef CMAKE_FEI_EVEN_H
#define CMAKE_FEI_EVEN_H
#ifdef _WIN32
	#if LIBEVEN_BUILD
		#define LIBEVEN_API __declspec(dllexport)
	#else
		#define LIBEVEN_API __declspec(dllimport)
	#endif
#else
	#define LIBEVEN_API
#endif
LIBEVEN_API int mathfei_is_even(int number);
//static library is simple as normal c code.
#endif

下面介紹上面的cmake_fei項目

最外面的CMakeLists.txt

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(HELLO)

MESSAGE(STATUS "This is project binary dir" ${HELLO_BINARY_DIR})
MESSAGE(STATUS "This is project source dir" ${HELLO_SOURCE_DIR})

MESSAGE(STATUS "This is cmake binary dir" ${CMAKE_BINARY_DIR})
MESSAGE(STATUS "This is cmake source dir" ${CMAKE_SOURCE_DIR})

ADD_SUBDIRECTORY(libhello)
ADD_SUBDIRECTORY(src)
ADD_SUBDIRECTORY(doc)
#ADD_SUBDIRECTORY(src bin)
#ADD_SUBDIRECTORY(libhello lib)

 

doc下面的CMakeLists.txt

install(DIRECTORY ${PROJECT_SOURCE_DIR}/doc DESTINATION /usr/apps/com.mc.cmake_fei/data FILES_MATCHING PATTERN "read*")

libhello下面的CMakeLists.txt

SET(LIB_SRC hello.c)
ADD_DEFINITIONS("-DLIBHELLO_BUILD")
SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

#dynamic library
ADD_LIBRARY(libhello SHARED ${LIB_SRC})

#static library
#ADD_LIBRARY(libhello  ${LIB_SRC})

set_target_properties(libhello PROPERTIES OUTPUT_NAME "hello")

#install command is executed when "sudo make install"
install(TARGETS libhello DESTINATION /usr/lib)
#attention, don't create new folder in /usr/lib, just put libhello.so in /usr/lib directlly'
install(FILES ${CMAKE_SOURCE_DIR}/libhello/hello.h DESTINATION /usr/include/hello)

 

hello.c

/*************************************************************************
	> File Name: hello.c
	> Author: ma6174
	> Mail: [email protected] 
	> Created Time: Mon 22 Dec 2014 01:11:57 PM HKT
 ************************************************************************/
#include <stdio.h>
#include "hello.h"

void hello(const char *name)
{
	printf("hello %s \n", name);
}

hello.h

/*************************************************************************
	> File Name: hello.h
	> Author: ma6174
	> Mail: [email protected] 
	> Created Time: Mon 22 Dec 2014 01:09:54 PM HKT
 ************************************************************************/
#ifndef CMAKE_FEI_HELLO_H
#define CMAKE_FEI_HELLO_H
#ifdef _WIN32
	#if LIBHELLO_BUILD
		#define LIBHELLO_API __declspec(dllexport)
	#else
		#define LIBHELLO_API __declspec(dllimport)
	#endif
#else
	#define LIBHELLO_API
#endif
LIBHELLO_API void hello(const char *name);
//static library is simple as normal c code.
#endif

src下面的CMakeLists.txt

include_directories(${PROJECT_SOURCE_DIR}/libhello)
SET(APP_SRC main.c)
SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
ADD_EXECUTABLE(hello ${APP_SRC})

target_link_libraries(hello libhello)
#why libhello, mathfei?
#because libhello is generated in the same project, and the library name is libhello
#mathfei is generated in another project, and name is libmathfei, but OUTPUT_NAME is changed to mathfei
target_link_libraries(hello mathfei)

#it is executed when sudo make install
install(TARGETS hello DESTINATION /usr/bin/hello)

main.c

#include <stdio.h>
#include <mathfei/mathfei.h>
#include <hello.h>

int main()
{	
	hello("hello world!");
	int value = mathfei_is_even(4);
	if (value)
		printf("%d is even number\n", 4);
	else
		printf("%d is odd number\n", 4);
	
	return 0;
}

 最後我們一般會創建一個build文件夾，用來專門build，這樣生成的build文件將會和source文件分開。

在build文件夾中運行cmake ../命令即可，具體命令格式可以cmake --help 查看。