CMake tutorial(1. start)

参考：/https://tuannguyen68.gitbooks.io/learning-cmake-a-beginner-s-guide/content/chap1/chap1.html

文件目录如下
test
├── CMakeLists.txt
└── test.cpp

• CMakeLists.txt

# Specify the minimun version for CMake
cmake_minimum_required(VERSION 2.8)

# Project's name
project(hello)

# Set the outpyt foldfer where your program will be created
set(CMAKE_BINARY_DIR ${CMAKE_SOURCE_DIR}/bin)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR})
set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR})

# The following folder will be included
include_directories("${PROJECT_SOURCE_DIR}")
add_executable(hello ${PROJECT_SOURCE_DIR}/test.cpp)                                                       

• test.cpp

#include<iostream>
using namespace std;
int main() {
  cout << "hello world" << endl;
  return 0;
}

运行一下命令

$ cmake -H. -Bbuild
$ cmake --build build -- -j3

之后就会生成可执行文件，-j3是用cpu的3个线程执行。
以上的命令其实相当于

$ mkdir build
$ cd build
$ 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/rhf/test/build

$ make
Scanning dependencies of target hello
[ 50%] Building CXX object CMakeFiles/hello.dir/test.cpp.o
[100%] Linking CXX executable ../bin/hello
[100%] Built target hello

执行

$ ./bin/hello
Hello World