实例分享cmake编译一个简单c++项目(demo)

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  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  #include  #include "addlib/library.h" using namespace std; int main(){ int n=10; int ans=acc_add(n); cout<<"1+....+"<<n<<"="<</div><p>CMakeLists.txt:</p><div class="gaodaimacode"><pre class="prettyprint linenums"> cmake_minimum_required(VERSION 3.10) project(cppproject) set(CMAKE_CXX_STANDARD 11) add_subdirectory(acclib) add_executable(cppproject main.cpp) #生<span style="color:transparent">来源gaodai#ma#com搞*!代#%^码$网</span>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