[clang] [clang] fix uefi target for aarch64 & x86_64 (PR #120632)

[via cfe-commits]

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@@ -788,16 +789,28 @@ class LLVM_LIBRARY_VISIBILITY ZOSTargetInfo : public OSTargetInfo<Target> {
 // UEFI target
 template <typename Target>
 class LLVM_LIBRARY_VISIBILITY UEFITargetInfo : public OSTargetInfo<Target> {
+  llvm::Triple Triple;
+
 protected:
   void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
-                    MacroBuilder &Builder) const override {}
+                    MacroBuilder &Builder) const override {
+    DefineStd(Builder, "uefi", Opts);
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Prabhuk wrote:

I have approvals to land #111719 and #111473 which breaks out some aspects of this large PR. I am happy to either land them first or wait for all those changes to be part of this PR. @RossComputerGuy I am happy to go with whichever way makes landing this patch faster. Let me know.



https://github.com/llvm/llvm-project/pull/120632