On Sun, Jul 12, 2020 at 12:15 PM Andy Mender <andymenderunix@gmail.com> wrote:
On Sat, 11 Jul 2020 at 21:47, Robert-André Mauchin <zebob.m@gmail.com> wrote:
%build
%cmake \
   -B build \
   -DUSE_BOOST_WAVE=ON \
   -DUSE_PARTIO=OFF \
   -DCMAKE_CXX_STANDARD=14 \
   -DLLVM_STATIC=0 \
   -DENABLERTTI=ON \
   -DSTOP_ON_WARNING=OFF \
   -DOSL_BUILD_MATERIALX:BOOL=ON \
   -DCMAKE_INSTALL_DOCDIR:PATH=%{_docdir}/%{name} \
   -DOSL_SHADER_INSTALL_DIR:PATH=%{_datadir}/%{name}/shaders/

I'm not familiar with openshadinglanguage, but I don't think enforcing C++14 like this is a good idea. Conformance to a particular C++ standard should be left to the project. I am actually contributing to a project which uses C++11 and builds properly with llvm/clang 10. If it's used as a workaround, I would add a comment to the spec file + a link to an issue ticket on GitHub if one exists (or create such a ticket if that's not the case) :).
 
This is what the upstream project explicitly says to do when using LLVM10: https://github.com/imageworks/OpenShadingLanguage/blob/master/src/cmake/externalpackages.cmake#L248. As such, it should be expected and no upstream bug is needed.

-Ian