实例分享cmake编译一个简单c++项目(demo)

时间:2021-05-19

下面通过一个小例子来说明cmake编译一个c++项目,生成可执行文件:

整理目录结构:

CMake Lists.txt addlib build main.cpp

电脑上没有tree命令,也不大敢截图,将就着看看,其中build是cmake编译指定的路径,addlib下面也有一个头文件和源文件 ,还有一个CmakeLists.txt,可以看下:

CMake Lists.txt library.cpp library.h

先看各个文件的代码:

addlib/library.h:

#ifndef CPPPROJECT_LIBRARY_H#define CPPPROJECT_LIBRARY_H int acc_add(int); #endif

addlib/library.cpp:

#include "library.h"#include <iostream> void hello(){ std::cout<<"hello world"<<std::endl;} int acc_add(int n){ int sum=0; for(int i=0;i<n;i++){ sum+=i; } return sum;}

addlib/CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)project(accliblibrary) set(CMAKE_CXX_STANDARD 11) add_library(accliblibrary SHARED library.cpp library.h) # 诉生成一个库文件。

main.cpp:

#include <iostream>#include <string>#include "addlib/library.h"using namespace std;int main(){ int n=10; int ans=acc_add(n); cout<<"1+....+"<<n<<"="<<ans<<endl; return 0;}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)project(cppproject) set(CMAKE_CXX_STANDARD 11) add_subdirectory(acclib) add_executable(cppproject main.cpp) #生成一个可执行的文件 target_link_libraries(cppproject accliblibrary)

下面就是编译该项目,生成可执行文件:

cd build/

cmake ..

-- The C compiler identification is AppleClang 8.0.0.8000042
-- The CXX compiler identification is AppleClang 8.0.0.8000042
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc
-- Check for working C compiler: /Library/Developer/CommandLineTools/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: /Library/Developer/CommandLineTools/usr/bin/c++
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/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/zhoumeixu/Documents/cmakedemo/build

make:

Scanning dependencies of target addliblibrary
[ 25%] Building CXX object addlib/CMakeFiles/addliblibrary.dir/library.cpp.o
[ 50%] Linking CXX shared library libaddliblibrary.dylib
[ 50%] Built target addliblibrary
Scanning dependencies of target cmakedemo
[ 75%] Building CXX object CMakeFiles/cmakedemo.dir/main.cpp.o
[100%] Linking CXX executable cmakedemo
[100%] Built target cmakedemo

./cmakedemo

1+....+10=45

这篇文章就介绍下面,下面小编将继续为大家介绍

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