[lld] lld: add support for NOCROSSREFS(_TO) (PR #95714)

[Daniel Thornburgh via llvm-commits]

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@@ -256,6 +256,11 @@ struct InsertCommand {
   StringRef where;
 };
 
+struct CrossRefList {
+  SmallVector<StringRef, 2> refs;
+  bool firstOnly;
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mysterymath wrote:

Along these lines, instead of using a `firstOnly` boolean to change the interpretation of refs, it would be cleaner to separate out a `toOutputSection` StringRef. This should help remove index juggling in the implementation, but it still needs a version of the above comment to describe how the semantics change when `toOutputSection` is present or absent.

https://github.com/llvm/llvm-project/pull/95714