John Ericson authored
- No need to distinguish between gcc-llvm and clang. First of all, gcc-llvm is quite old and surely unmaintained by now. Second of all, none of the code actually care about that distinction! Now, it does make sense to consider C multiple frontends for LLVMs in the form of clang vs clang-cl (same clang, yes, but tweaked interface). But this is better handled in terms of "gccish vs mvscish" and "is LLVM", yielding 4 combinations. Therefore, I don't think it is useful saving the existing code for that. - Get the remaining CC_LLVM_BACKEND, and also TABLES_NEXT_TO_CODE in mk/config.h the normal way, rather than hacking it post-hoc. No point keeping these special cases around for now reason. - Get rid of hand-rolled `die` function and just use `AC_MSG_ERROR`. - Abstract check + flag override for unregisterised and tables next to code. Oh, and as part of the above I also renamed/combined some variables where it felt appropriate. - GccIsClang -> CcLlvmBackend. This is for `AC_SUBST`, like the other Camal case ones. It was never about gcc-llvm, or Apple's renamed clang, to be clear. - llvm_CC_FLAVOR -> CC_LLVM_BACKEND. This is for `AC_DEFINE`, like the other all-caps snake case ones. llvm_CC_FLAVOR was just silly indirection *and* an odd name to boot.