如何让 cmake 使用 msys2 (mingw) 下的 gnu 工具堆栈

Question

在 Windows 10 上，安装了 msys2，它是 mingw 的一个变体，我安装了带有 gcc 工具链和所有标准工具（如 make）的 cmake。

g++的版本是6.2，make是4.2.1都在路径里。

当我使用 cmake 构建时：

cmake .

它尝试使用 nmake 和 cl 构建。所以不知何故因为我在 Windows 上 cmake 正在尝试使用 Visual Studio 工具链。

export CMAKE_CXX_COMPILER=g++

没有帮助。错误是：

-- Building for: NMake Makefiles
-- The C compiler identification is unknown
-- The CXX compiler identification is Clang 3.8.0
-- Check for working C compiler: D:/msys64/mingw64/bin/clang++.exe
CMake Error: Generator: execution of make failed. Make command was: "nmake" "/NOLOGO" "cmTC_87e5f\fast"
-- Check for working C compiler: D:/msys64/mingw64/bin/clang++.exe -- broken
CMake Error at D:/msys64/mingw64/share/cmake-3.6/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "D:/msys64/mingw64/bin/clang++.exe" is not able to compile a
  simple test program.

  It fails with the following output:

   Change Dir: D:/git/CSP/CMakeFiles/CMakeTmp



  Run Build Command:"nmake" "/NOLOGO" "cmTC_87e5f\fast"



  Generator: execution of make failed.  Make command was: "nmake" "/NOLOGO"
  "cmTC_87e5f\fast"





  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:2 (project)


-- Configuring incomplete, errors occurred!
See also "D:/git/CSP/CMakeFiles/CMakeOutput.log".
See also "D:/git/CSP/CMakeFiles/CMakeError.log".

Answer 1

要使用 MSYS2 工具链，您需要明确指定构建系统生成器，即

cmake -G 'MSYS Makefiles' .

附加说明，分离应用程序是一个好习惯。源文件和cmake的生成文件，例如

mkdir build
cd build
cmake -G 'MSYS Makefiles' ..