CMake 简介
CMake 是一个跨平台的自动化建构系统, 它使用一个名为 CMakeLists.txt 的文件来描述构建过程,可以产生标准的构建文件, 如 Unix 的 Makefile 或Windows Visual C++ 的 projects/workspaces 文件 CMakeLists.txt 需要手工编写, 也可以通过编写脚本进行半自动的生成
CMake Demo
main.cpp
#include <iostream>
int main() {
std::cout<<"Hello word!"<<std::endl;
return 0;
}
CMakeLists.txt
# CMakeLists.txt 的语法比较简单,由命令、注释和空格组成,其中命令是不区分大小写的,符号"#"后面的内容被认为是注释。
# 命令由命令名称、小括号和参数组成,参数之间使用空格进行间隔
# 项目的名称是 main
PROJECT(main)
# 限定了 CMake 的版本
CMAKE_MINIMUM_REQUIRED(VERSION 3.4.1)
# AUX_SOURCE_DIRECTORY 将当前目录中的源文件名称赋值给变量 DIR_SRCS
AUX_SOURCE_DIRECTORY(. DIR_SRCS)
# 指示变量 DIR_SRCS 中的源文件需要编译 成一个名称为 main 的可执行文件
ADD_EXECUTABLE(main ${DIR_SRCS})
构建-cmake .
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- 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/***/JNI/cmake
构建结果
├── CMakeCache.txt
├── CMakeFiles
│ ├── 3.5.1
│ │ ├── CMakeCCompiler.cmake
│ │ ├── CMakeCXXCompiler.cmake
│ │ ├── CMakeDetermineCompilerABI_C.bin
│ │ ├── CMakeDetermineCompilerABI_CXX.bin
│ │ ├── CMakeSystem.cmake
│ │ ├── CompilerIdC
│ │ │ ├── a.out
│ │ │ └── CMakeCCompilerId.c
│ │ └── CompilerIdCXX
│ │ ├── a.out
│ │ └── CMakeCXXCompilerId.cpp
│ ├── cmake.check_cache
│ ├── CMakeDirectoryInformation.cmake
│ ├── CMakeOutput.log
│ ├── CMakeTmp
│ ├── feature_tests.bin
│ ├── feature_tests.c
│ ├── feature_tests.cxx
│ ├── main.dir
│ │ ├── build.make
│ │ ├── cmake_clean.cmake
│ │ ├── DependInfo.cmake
│ │ ├── depend.make
│ │ ├── flags.make
│ │ ├── link.txt
│ │ └── progress.make
│ ├── Makefile2
│ ├── Makefile.cmake
│ ├── progress.marks
│ └── TargetDirectories.txt
├── cmake_install.cmake
├── CMakeLists.txt
├── main.cpp
└── Makefile
执行编译-make
[ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o
[100%] Linking CXX executable main
[100%] Built target main
运行main.bin
Hello word!
