Support `$LLVM_VERSION`, `$LLVM_TARGETS`, and `$LLVM_LDFLAGS`#15091

Draft

HertzDevil wants to merge 2 commits intocrystal-lang:masterfrom HertzDevil:feature/lib-llvm-defaults

+27-13

Commits on Oct 17, 2024

Support $LLVM_VERSION, $LLVM_TARGETS, and $LLVM_LDFLAGS
HertzDevil
committed

Commits on Oct 31, 2024

Merge branch 'master' into feature/lib-llvm-defaults
HertzDevil
committed