c – 如何告诉CMake在Windows上使用Clang？

最新的CMake 3.6版本在Windows上有几个集成支持的Clang构建环境(例如Visual Studio,Cygwin;见Release Notes).

我刚刚用一个成功的测试

> LLVM-3.9.0-r273898-win32.exe从http://llvm.org/builds/
> cmake-3.6.0-rc4-win64-x64.msi从https://cmake.org/download/
> Microsoft VS2015 Community Edition版本14.0.23107.0

全部安装到其标准路径,其bin目录位于全局PATH环境中.

您需要知道的部分是使用CMake -T“LLVM-vs2014”命令行选项设置正确的工具集.在配置过程中,CMake会告诉您它找到/采用的编译器.

的CMakeLists.txt

cmake_minimum_required(VERSION 3.6)

project(HelloWorld)

file(
    WRITE main.cpp 
        "#include <iostream>n"
        "int main() { std::cout << "Hello World!" << std::endl; return 0; }"
)
add_executable(${PROJECT_NAME} main.cpp)

Windows控制台

...> mkdir VS2015
...> cd VS2015
...VS2015> cmake -G"Visual Studio 14 2015" -T"LLVM-vs2014" ..
-- The C compiler identification is Clang 3.9.0
-- The CXX compiler identification is Clang 3.9.0
-- Check for working C compiler: C:/Program Files (x86)/LLVM/msbuild-bin/cl.exe
-- Check for working C compiler: C:/Program Files (x86)/LLVM/msbuild-bin/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/LLVM/msbuild-bin/cl.exe
-- Check for working CXX compiler: C:/Program Files (x86)/LLVM/msbuild-bin/cl.exe -- 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: .../VS2015
...VS2015> cmake --build . 
Microsoft (R)-Buildmodul,Version 14.0.23107.0
[...]
...VS2015> DebugHelloWorld.exe
Hello World!

安装提示

请注意,我在设置过程中已将LLVM添加到搜索路径中：

您可以在任何VS项目的属性页面中交叉检查可用的“平台工具集”：

参考

> What is the -D define to tell Cmake where to find nmake?
> Linker for Clang?
> Switching between GCC and Clang/LLVM using CMake