[cfe-dev] Question on usage of clang on windows with cmake and ninja

[Reid Kleckner via cfe-dev]

Try clang-cl instead, like this:
$ cmake .. -GNinja -DCMAKE_C_COMPILER=clang-cl -DCMAKE_CXX_COMPILER=clang-cl

If you use the other command line syntax, it looks like CMake has mingw-ish
assumptions about what linker flags are valid.

On Sun, Feb 7, 2016 at 3:49 AM, Victor Leschuk via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hello all,
>
> I am currently trying to use clang compiler on Windows 7 (64bit), I have
> built LLVM and clang from sources (master branch) using VS 2015.
>
> Now I am trying to rebuild the LLVM and clang using clang itself.
>
> So I am stuck setting correct configuration for cmake.
>
> I am running the following command:
>
>  $ cmake .. -G "Ninja" -DCMAKE_C_COMPILER=clang
> -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER_ID=Clang
> -DCMAKE_CXX_COMPILER_ID=Clang
>
> And after that the first test fails with linkage error:
>
>   CMakeFiles\cmTC_8f103.dir\testCCompiler.c.obj -o cmTC_8f103.exe
>   -Wl,--out-implib,libcmTC_8f103.dll.a
>   -Wl,--major-image-version,0,--minor-image-version,0 && cd ."
>
>   LINK : warning LNK4044: unrecognized option '/-out-implib'; ignored
>
>   LINK : warning LNK4044: unrecognized option '/-major-image-version';
>   ignored
>
>   LINK : warning LNK4044: unrecognized option '/-minor-image-version';
>   ignored
>
>   LINK : fatal error LNK1181: cannot open input file 'libcmTC_8f103.dll.a'
>
>   clang.exe: error: linker command failed with exit code 1181 (use -v to
> see
>
> I have found similar bug:
>
> https://llvm.org/bugs/show_bug.cgi?id=20868
>
> However it is for WinXP and is marked as already fixed.
>
> Also here is similar unsolved discussion SO:
> http://stackoverflow.com/questions/22585874/building-c-project-on-windows-with-cmake-clang-and-ninja
>
> Here is clang version which I am trying to use:
>
> $ clang --version
> clang version 3.9.0
> Target: i686-pc-windows-msvc
> Thread model: posix
> InstalledDir: C:\Users\del\work\llvm\bin
>
> It would be great is somebody could point me on what am I doing wrong?
>
> Thanks in advance!
>
> --
> Victor
>
>
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> cfe-dev at lists.llvm.org
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