[lld] [llvm] [lld][AArch64][Build Attributes] Add support for converting AArch64 Build Attributes to GNU Properties (PR #131990)

[Peter Smith via llvm-commits]

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@@ -207,6 +209,51 @@ static void updateSupportedARMFeatures(Ctx &ctx,
   ctx.arg.armHasThumb2ISA |= thumb && *thumb >= ARMBuildAttrs::AllowThumb32;
 }
 
+struct AArch64BuildAttrSubsections {
+  struct PauthSubSection {
+    unsigned tagPlatform = 0;
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smithp35 wrote:

The PauthSubSection as modelled could go up to 64-bits in size (unlikely, but possible), yet `unsigned` has a platform dependent size (often 32-bit). This should be a `uint64_t`.

https://github.com/llvm/llvm-project/pull/131990