Llvm-bpf build fails when compiling using multiple cores

Wondering if anyone else has seen this. I'm doing a source build from main today on a quad core system via:

make -j4

This is failing every time consistently when it gets to trying to build llvm-bpf.

I wanted to see what the actual issue was, so proceeded to try again using:

make V=sc

I was expecting it to fail so I could see what the real issue is, but the llvm-bpf build now succeeds when using only a single core / V=sc options.. no errors. Once llvm-bpf was compiled successfully I stopped the build and restarted it using my normal make -j4, and everything seems to be proceeding normally now.

I did do a "make download" before starting the build. I'm at an impasse though as now I have no idea why the llvm-bpf build is failing against a multi-core compile.

Anyone else seeing this/have any ideas? Thanks in advance.