学习cmake

make

cmake是为了支持make的跨平台而出现的。因此，我们首先学习make，可以看这里。

cmake

mark：2018-09-08
basic tutial
关于cmake的博客
cmake常用的命令
文件目录结构：

project
│   CMakeLists.txt
└───deps
│   │   CMakeLists.txt
│   └───include
│   │   └───deps.cc
│   └───src
│   │   └───deps.h   
└───include
│   └───main.h 
└───src
│   └───main.cc

在./CMakeLists.txt

cmake_minimum_required(VERSION 3.10)
project(CPrimerTest)
set(CMAKE_CXX_STANDARD 14)
include_directories ("${PROJECT_SOURCE_DIR}/deps")
add_subdirectory (deps)
# add the executable
add_executable(CPrimerTest src/main.cpp include/main.h)#生成可执行文件
target_link_libraries(CPrimerTest deps)
# add the install targets
install (TARGETS CPrimerTest DESTINATION bin)
install (FILES include/main.h DESTINATION include)

在./deps/CMakeLists.txt中

cmake_minimum_required(VERSION 3.10)
project(deps)
set(CMAKE_CXX_STANDARD 14)
add_library(deps src/deps.cpp include/deps.h) #生成库
install (TARGETS deps DESTINATION bin)
install (FILES include/deps.h DESTINATION include)

之后编译、安装

mkdir build && cd build
cmake ..
make && make install DESTDIR=~/Documents/code/CPrimerTest/install_test_dir

附：
deps.h

#ifndef CPRIMERTEST_DEPS_H
#define CPRIMERTEST_DEPS_H
class Deps{
public:
    Deps();
    void print();
};
#endif //CPRIMERTEST_DEPS_H

deps.h：

#include "../include/deps.h"
#include <iostream>
int cnt = 0;
Deps::Deps() {
    cnt++;
}
void Deps::print() {
    std::cout<<"it is a Deps instance. ID:"<<cnt<<std::endl;
}

main.cc：

#include <iostream>
#include "../deps/include/deps.h"
using namespace std;
extern int cnt;
int main() {
    Deps deps;
    deps.print();
    std::cout<<cnt<<flush;
    std::cout<<'a';//需要等待flush
    std::cerr<<'e';
    return 0;
}

main.h：

#ifndef CPRIMERTEST_MAIN_H
#define CPRIMERTEST_MAIN_H
#include <iostream>
class A{
    A(int a){
        std::cout<<a;
    }
};
#endif //CPRIMERTEST_MAIN_H