devel/libclc: Update to 12.0.1

[manu]

Summary

• Use llvm releases of libclc
• Force llvm12 as it is what's used for mesa/clover
• Use the llvm12 flavor of spirv-llvm-translator

Test Plan

Not tested

[jbeich]

Moving to libclc from llvm12 needs llvm-spirv ...

llvm-spirv dependency can be dropped:

post-patch:
# Exclude targets depending on llvm-spirv
	@${REINPLACE_CMD} -e '/^[[:space:]]*spirv.*mesa/d' \
		${WRKSRC}/CMakeLists.txt

or after 9b3e3e4b33ca fixed with:

BUILD_DEPENDS+=	llvm-spirv:devel/spirv-llvm-translator
# Can be a relative path e.g., -DLLVM_SPIRV:FILEPATH=llvm-spirv
CMAKE_ARGS+=	-DLLVM_SPIRV:FILEPATH="${LOCALBASE}/bin/llvm-spirv"

Caveat: spirv-llvm-translator currently uses llvm11 because intel-graphics-compiler upstream keeps reverting llvm12 support.

[jbeich]

I don't use this port, so not interested in thoroughly reviewing.

devel/libclc/Makefile

25

Either qualify type by adding :FILEPATH then quote the path or use relative path e.g., -DLLVM_CONFIG=llvm-config12. Such style appears to be preferred by devel/cmake maintainer.

[jbeich]

After c638dc3a4dc4 libclc >= 12.* will automatically find llvm-spirv without adjusting CMAKE_ARGS if the dependency is installed for the desired LLVM version.

[manu]

Update to 12.0.1
Use the llvm12 flavor of spirv-llvm-translator