[llvm-branch-commits] [llvm] gn build: Add check-builtins target. (PR #134482)

[Peter Collingbourne via llvm-branch-commits]

pcc wrote:

> wow this is very messy, feels like there should be a better way to do this on the CMake side

Yeah, or maybe even in the tests themselves, maybe they should be using weak symbols for the builtins and return unsupported if the symbol is undefined at runtime.

https://github.com/llvm/llvm-project/pull/134482