[lld] [ELF] Support NOCROSSREFS and NOCROSSERFS_TO (PR #98773)

[Fangrui Song via llvm-commits]

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@@ -299,6 +304,15 @@ void ScriptParser::readDefsym(StringRef name) {
   script->sectionCommands.push_back(cmd);
 }
 
+void ScriptParser::readNoCrossRefs(bool to) {
+  expect("(");
+  NoCrossRefCommand cmd{{}, to};
+  while (!errorCount() && !consume(")"))
+    cmd.outputSections.push_back(unquote(next()));
+  if (cmd.outputSections.size() >= 2)
+    script->noCrossRefs.push_back(std::move(cmd));
+}
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MaskRay wrote:

Added a warning. 

https://github.com/llvm/llvm-project/pull/98773