Using CLang with MinGW64 on Windows

[RoyiAvital]

Using CLang with MinGW64 on Windows

[RoyiAvital]

@dutow , Any comment?

Thank You.

[dutow]

Hello

Sorry for the late reply. Regarding the issue you linked, I had no time to work on it on the summer - I hope to finish it in a few weeks.

For your 3 use cases:

The first should work - there is a separate toolchain setting you should pass to cmake: cmake .. -TLLVM-vs2014 -G"Visual Studio 14 2015"

For your second, I usually use it after loading the visual studio variables - you can load them in any command prompt / script easily, for example:

call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall" amd64

Without this, the main issue is with the linker - but I didn't investigate the issue much, as loading the variables is easy.

3 - As far as I know, that's not possible right now, not without some changes in the mingw generator, because of the ABI difference you mentioned.

[RoyiAvital]

Hi,

Will (1) work if I have MSVC 2017?
Namely can I do cmake -G"Visual Studio 14 2015" -T"LLVM-vs2014" .. even if I only have MSVC 2017 installed?

Regarding (3), Is there a way to prevent CMake from checking the ABI and just treat CLang as it would treat GCC just with different command (Something to set the driver of Clang to GCC)?

[RoyiAvital]

@dutow , Any updates regarding Clang on Windows with Cmake?

Thank You.

[dutow]

@RoyiAvital with 3.15, the clang++/clang format works on windows too. E.g. CC=clang CXX=clang++ cmake -G Ninja works on windows.

With 3.16, it will work even without vcvarsall (assuming the limited llvm-rc is good for your project), and for clang-cl too. You can even do this with 3.15, if you specify the RC compiler and linker manually.

For your (1) and (3) use cases, I have no updates / I'm still not using those - so if you have any issues with them, you probably should open a bug on the cmake gitlab.

Edit: but based on the cmake code, (3) should work?

[RoyiAvital]

We have Clang with:

clang version 8.0.1 (tags/RELEASE_801/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: D:\Applications\Programming\MSYS64\mingw64\bin

And

clang version 8.0.1 (tags/RELEASE_801/final)
Target: x86_64-w64-windows-gnu
Thread model: posix
InstalledDir: D:\Applications\Programming\MSYS64\mingw64\bin

Will we have support for both?