CMake使用

CMake使用

基础CMakeList.txt

$ ls
CMakeLists.txt  main.c
$ cat CMakeLists.txt
### cmake的最低版本
cmake_minimum_required(VERSION 2.8)
### 工程名
project(helloworld)

### 设置编译参数
set(CMAKE_CXX_FLAGS  "-Wall") set(CMAKE_CXX_FLAGS_DEBUG  "-g3") set(CMAKE_CXX_FLAGS_RELEASE  "-O2")

### 可执行文件名、源文件列表
add_executable(helloworld main.c)

使用pkg-config的CMakeList.txt

$ ls
bird.c  bird.h  CMakeLists.txt  main.c

$ cat CMakeLists.txt
### cmake的最低版本
cmake_minimum_required(VERSION 2.8)
###工程名
project(glib)
### 遍历当前目录及子目录获取所有源文件
file(GLOB SRC "${CMAKE_CURRENT_SOURCE_DIR}/*.c")
### 设置源文件列表
add_executable(glib ${SRC})

### dependencies
INCLUDE(FindPkgConfig)
### 使用pkg-config寻找glib-2.0和gobject-2.0库的include目录以及库
pkg_check_modules(GLIB REQUIRED glib-2.0)
pkg_check_modules(GOBJECT REQUIRED gobject-2.0)
include_directories(${GLIB_INCLUDE_DIRS} ${GOBJECT_INCLUDE_DIRS})
link_directories(${GLIB_LIBRARY_DIRS} ${GOBJECT_LIBRARY_DIRS})
### 设置链接库
target_link_libraries(glib ${GLIB_LIBRARIES} ${GOBJECT_LIBRARIES})

动态库CMakeList.txt

$ ls
CMakeLists.txt  greet.cpp  greet_wrapper.cpp
$ cat greet.cpp
char const* greet()
{
    return "hello world";
}

$ cat greet_wrapper.cpp
#include <boost/python.hpp>
#include "greet.cpp"

BOOST_PYTHON_MODULE(hello_ext)
{
    using namespace boost::python;
    def("greet", greet);
}

$ cat CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
project(greet)

set(greetSRC greet_wrapper.cpp)
### 生成动态库
add_library(hello_ext SHARED ${greetSRC})
### 去掉库名前缀lib
set_target_properties(hello_ext PROPERTIES PREFIX "")

#dependencies
INCLUDE(FindPkgConfig)
pkg_check_modules(PYTHON REQUIRED python)
include_directories(/usr/include ${PYTHON_INCLUDE_DIRS})
target_link_libraries(hello_ext boost_python)

执行shell命令

$ cat ../CMakeLists.txt
### cmake的最低版本
cmake_minimum_required(VERSION 2.8)

### 新增伪命令'cmd'，即新增'make cmd'命令，命令的结果就是输出"exec"字符串，如果添加了'ALL'，则会将此命令添加到默认的构建目标，即'make'的时候会自动被执行
add_custom_target(cmd ALL
        COMMAND echo "exec"
)
$ cmake .
-- The C compiler identification is GNU 5.3.1
-- The CXX compiler identification is GNU 5.3.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/fedora/experiment/test
$ make
Scanning dependencies of target cmd
exec
Built target cmd