[clang] [clang] add llvm abi support (PR #121123)

[Tristan Ross via cfe-commits]

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@@ -1531,7 +1531,7 @@ Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
 
   // Check if the environment version is valid except wasm case.
   llvm::Triple Triple = TC.getTriple();
-  if (!Triple.isWasm()) {
+  if (!Triple.isWasm() && Triple.getEnvironment() != llvm::Triple::LLVM) {
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RossComputerGuy wrote:

The problem I was running into was I'd get invalid version error. My assumption was that the LLVM ABI would not have a version because that would be the version of the entire LLVM stack. I didn't see any other ways when grepping the source that could disable the error.

https://github.com/llvm/llvm-project/pull/121123