[lld] [LLD][COFF] Add support for EXPORTAS import name type. (PR #86541)

[Daniel Paoliello via llvm-commits]

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@@ -607,6 +608,13 @@ Export LinkerDriver::parseExport(StringRef arg) {
       e.isPrivate = true;
       continue;
     }
+    if (tok.equals_insensitive("exportas")) {
+      if (!rest.empty() && !rest.contains(','))
+        e.exportAs = rest;
+      else
+        error("invalid EXPORTAS value: " + rest);
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dpaoliello wrote:

Should this be `fatal`, or `goto err` afterwards?

https://github.com/llvm/llvm-project/pull/86541