[cfe-dev] Mingw-builds mingw-w64 include directories

[Johan Engelen]

On 23-5-2014 9:39, Ruben Van Boxem wrote:
> Hi Johan,
>
> The Driver merge request is located here:
> http://reviews.llvm.org/D3420
>
> It was not submitted by me, but has seen little activity lately :-( I 
> would say the patch more or less applies cleanly and should work, 
> although I myself haven't taken a very close look at the 
> modifications. Try it out, and let us know if something doesn't work. 
> I wrote the original Driver code based on a personal GCC build (with 
> default options) and the Arch MinGW-w64 cross toolchain. So your 
> mileage may vary.
>

Hi Ruben,
   It took a while but I finally looked at the patch. It almost works. :-)
It applies cleanly and compiles fine. But it does not search/find the 
correct folders (for the MinGW-W64-builds download at least). The C++ 
search paths do not include the GCC version in that package, in contrast 
to what the mingw driver patch is searching for.

I have added code to the merge request that makes it work for me.
http://reviews.llvm.org/D3420#12

Please have a look. I am not familiar with how to properly modify the 
merge request.

Thanks for the trouble. Again, it would be great if the next release 
would have easier support for mingw64.

Johan



> Ruben
>
>
> 2014-05-23 1:32 GMT+02:00 Nikola Smiljanic <popizdeh at gmail.com 
> <mailto:popizdeh at gmail.com>>:
>
>     Hi Johan, I think that we're trying to move away from logic in
>     InitHeaderSearch. The idea is to implement MinGW toolchain and the
>     same way we have Windows, GCC and other toolchains. Last thing I
>     heard Ruben was working on this (+CC)
>
>     Search for thread titled "Clang and (cross-)compilation to [i686,
>     x86_64]-w64-mingw32" on the mailing list for more info.
>
>
>     On Fri, May 23, 2014 at 8:56 AM, Johan Engelen
>     <jbc.engelen at swissonline.ch <mailto:jbc.engelen at swissonline.ch>>
>     wrote:
>
>         Hello all,
>           To make clang++ work (easily) with the latest mingw-w64
>         builds by the Mingw-build project, I added more paths to the
>         search for default include directories, and it works splendid.
>         See the attached patch.
>         In short, the issue is that clang is searching for versioned
>         paths, but (at least for the package with gcc4.9.0) the C++
>         include paths aren't versioned. For example, right now, clang
>         is searching for
>           [...]/include/c++/4.8.0
>         while really this folder is
>           [...]/x86_64-w64-mingw32/include/c++
>
>         Are you happy to add the following paths to the default list?
>         <sysroot>/x86_64-w64-mingw32/include/c++/
>         <sysroot>/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32
>         <sysroot>/x86_64-w64-mingw32/include/c++/backward
>         <sysroot>/i686-w64-mingw32/include/c++/
>         <sysroot>/i686-w64-mingw32/include/c++/i686-w64-mingw32
>         <sysroot>/i686-w64-mingw32/include/c++/backward
>         (the final 3 are a guess, judging from the symmetry in the
>         pathnames that clang already searches for)
>         This assumes gcc and clang are in <sysroot>/bin.
>         I believe it will make life much easier for Windows developers
>         who want to give clang a spin.
>
>         If so, I will clean up the modifications and submit it for review.
>
>         Thanks,
>           Johan
>
>
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