I just noticed this after doing my daily mesa update. It failed.
Here is the build log https://pastebin.com/4uDaiWNd
src/gallium/targets/opencl/meson.build was changed in mesa master after the MR was created.
I've attached the version I created for archlinux aur mesa-git based on the MR.
Created attachment 144686 [details] [review]
FWIW, this was triggered by clang SVN r364424, not directly related to that Mesa commit. Anyway, fixed now with: