[llvm-dev] Recent LLVM Build Attempt -- obj.ClangAST.vcxproj Failed to Build

Reid Kleckner via llvm-dev llvm-dev at lists.llvm.org
Thu Oct 31 14:31:58 PDT 2019

I went ahead and did that in 19f1dc7. I wasn't able to reproduce the
problem locally, but I am not building through Visual Studio, I am using
ninja. To build in C++17 mode, I just re-ran with -std:c++17, and got
warnings but no errors.

On Thu, Oct 31, 2019 at 11:11 AM Jonathan Meier <jonathan.meier at outlook.com>

> From a quick glance at the build log, you should be able to avoid the
> ambiguity by removing the alias template
> `template <typename T> using Optional = llvm::Optional<T>;`
> from the files ByteCodeExprGen.cpp and ByteCodeStmtGen.cpp in
> clang/lib/AST/Interp.
> Note that this is just my best guess, I didn‘t try it myself. I‘m also not
> sure why MSVC sees an ambiguity here.
> Am 31.10.2019 um 14:44 schrieb Osman Zakir via llvm-dev <
> llvm-dev at lists.llvm.org>:
> I hope I'm not being too presumptuous or anything when I say this: could
> you guys please review the obj.ClangAST.vcxproj project and try to fix the
> ambiguity error?
> Reid asked me why I'm using C++17.  I just want to use the latest released
> standard.  Most if it still compiles anyway.  So I'll stick with it.
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