Add support for compiler-rt inclusion

[testhound]

This pull request adds support for including compiler-rt as a artifact. It is meant to address this outstanding issue:
#834

[sklam]

Developer Note:

This PR depends on merging LLVM14 changes.

[sklam]

From OOB discussion, the OSX build failure is depending on conda/conda-build#4787 to successfully build compiler-rt

[testhound]

@sklam and @gmarkall ready for review after adding support for llvm 14. Note that there are several places where I was forced to iinstall llvmdev from my channel because it includes compiler-rt.

For example: "call conda install -y -q --override-channels -c mcollison llvmdev="14.*"

Note that MacOS is still failing due to: conda/conda-build#4787

[testhound]

@sklam and @gmarkall: all buildfarm tests now pass, ready for review.

[testhound]

@sklam and @gmarkall I had to modify conda build locally as described by the last comment here:

conda/conda-build#4808

[testhound]

@sklam and @gmarkall I resolved the merge conflicts and remove support for LLVM 11.

[sklam]

@esc, please consider this and related PR for inclusion of the upcoming llvmlite release.

[esc]

@esc, please consider this and related PR for inclusion of the upcoming llvmlite release.

Thank you, added to the milestone.

[oliverhu]

@testhound I followed this PR, and it seems libclang_rt is not statically linked into llvmlite.so, not sure if that is intended or not. btw, shall we add tests to validate this works in both native bfloat architecture & non-native bfloat architecture?

[gmarkall]

@oliverhu This PR is not being worked on by @testhound anymore, and needs someone to pick it up and continue it - eventually someone working on Numba / llvmlite may get round to it, but it could take some time - do you have any interest in attempting to adopt this PR and working on it? I'm happy whether you are or aren't - just let me know if you are and we can figure out some steps to move this forward.

[oliverhu]

@gmarkall thanks! happy to help here...the only concern is I'm new to this project (got a crash from tinygrad/tinygrad#1367 so I hunted all the way down here). I might not have the full context besides the issue I was impacted. Is there a channel (slack/discord) to discuss questions? back-n-forth in GitHub is not the most effective way!

[gmarkall]

@oliverhu There's the Numba Gitter (https://matrix.to/#/#numba_numba:gitter.im) - I'm usually around there during UK office hours (it's 11pm here but I can discuss this interactively tomorrow).

[oliverhu]

Sounds good, will reach out on gitter!

[gmarkall]

Superseded by #986 / #1036, etc.