CMake Tutorial1_1 最简单的例子

一 内容

1. CMake最简单的例子只需要一个3行的CMakeLists.txt和一个源文件例如main.cc

2. CMakeLists.txt

   # 设置CMake最低版本
   cmake_minimum_required(VERSION 3.16)
   
   # 设置项目名称及版本
   project(Tutorial VERSION 1.0)
   # 可仅设置项目名称
   # project(Tutorial)
   
   # 生成可执行文件
   add_executable(Tutorial main.cc)
   

3. main.cc

   #include <iostream>
   
   int main() {
     std::cout << "first case." << std::endl;
     return 0;
   }
   

二 构建

1. 创建并进入构建目录。因为构建会生成其他文件，单独的构建目录可以避免源文件目录被污染。

   lee@leedeMacBook-Pro step1 % ls -l
   total 16
   -rw-r--r--  1 lee  staff  228  5 27 17:03 CMakeLists.txt
   -rw-r--r--  1 lee  staff   90  5 27 15:44 main.cc
   lee@leedeMacBook-Pro step1 % mkdir build
   lee@leedeMacBook-Pro step1 % ls -l
   total 16
   -rw-r--r--  1 lee  staff  228  5 27 17:03 CMakeLists.txt
   drwxr-xr-x  2 lee  staff   64  5 27 19:32 build
   -rw-r--r--  1 lee  staff   90  5 27 15:44 main.cc
   lee@leedeMacBook-Pro step1 % cd build
   lee@leedeMacBook-Pro build % 
   

2. build&run

   lee@leedeMacBook-Pro build % cmake ..
   -- The C compiler identification is AppleClang 12.0.0.12000032
   -- The CXX compiler identification is AppleClang 12.0.0.12000032
   -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
   -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/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: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
   -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/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: /Users/lee/research/cmake_learn/cmake_tutorial/step1/build
   lee@leedeMacBook-Pro build % ls
   CMakeCache.txt		Makefile
   CMakeFiles		cmake_install.cmake
   lee@leedeMacBook-Pro build % cmake --build .
   Scanning dependencies of target Tutorial
   [ 50%] Building CXX object CMakeFiles/Tutorial.dir/main.cc.o
   [100%] Linking CXX executable Tutorial
   [100%] Built target Tutorial
   lee@leedeMacBook-Pro build % ls
   CMakeCache.txt		Makefile		cmake_install.cmake
   CMakeFiles		Tutorial
   lee@leedeMacBook-Pro build % ./Tutorial 
   first case.
   lee@leedeMacBook-Pro build % 
   

三 Github

• 代码已上传Github

四 参考

• CMake