+cc cfe-users back; On Thu, Nov 8, 2018 at 10:20 PM KOLANICH <kola...@mail.ru> wrote:
> 2018 11 7 23:25:38 UTC, Artem Belevich <t...@google.com> пишет: > >This may be same/similar to https://bugs.llvm.org/show_bug.cgi?id=38811 > > > >Basically, there's no owner for CUDA support on windows. Someone needs > >to > >figure out why/how CUDA includes behave differently under mingw and > >figure > >out how to work around that in the CUDA wrapper headers in clang. > > > > > >On Fri, Nov 2, 2018 at 2:23 PM KOLANICH via cfe-users < > >cfe-users@lists.llvm.org> wrote: > > > >> Hello everybody. > >> > >> Could anyone clarify how to use this cuda target (-std=c++11 -x cuda) > >with > >> MinGW stdlib? > >> > >> I mean I get errors > >> > >> > > ><censored2>\LLVM-7.0.0-win32\lib\clang\7.0.0\include\cuda_wrappers\new:41:12: > >> error: use of undeclared identifier 'malloc' return ::malloc(size); > >> > > ><censored2>\LLVM-7.0.0-win32\lib\clang\7.0.0\include\cuda_wrappers\new:58:7: > >> error: no type named 'free' in the global namespace ::free(ptr); > >> > >> and I wonder what I should do to fix them. > >> _______________________________________________ > >> cfe-users mailing list > >> cfe-users@lists.llvm.org > >> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users > >> > > Thank you for the suggestion. But this doesn't clarify the strange syntax > used in the mentioned lines. You need to look at the preprocessed output in order to see what is it that clang is complaining about. > I googled a bit and haven't found anything clarifying, but there are some > hints suggesting that it may be specific to Visual Studio. > It's quite likely. Clang's wrappers for C++ standard library are fairly specific to particular library. AFAICT we never even tried to make it work with whatever VC uses. > > P.S. I don't use CUDA headers You actually do. With "-x cuda" clang pre-includes ton of CUDA headers (same as nvcc) and adds extra include search paths. If you do not want to pre-include any CUDA headers, then you need to pass -nocudainc option. > - I have AMD GPU and there is a CUDA impl for any OpenCL-capable device > having own headers, which may be far more compatible that the ones provided > by CUDA. Interesting. Can you tell me more about this CUDA-over-OpenCL project? > The problem I encounter in the headers shipped with CLang, it seems they > depend on something missing in MinGW headers. > Those headers are only intended to make clang work with NVIDIA's CUDA SDK on linux. MinGW + a project that provides alternative CUDA headers is unlikely to work as is. -nocudainc should get clang's headers out of your way, but it will be up to you to provide the equivalent. Good luck, -- --Artem Belevich
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