[lld] [LLD][COFF] Add -build-id flag to generate .buildid section. (PR #71433)

[Zequan Wu via llvm-commits]

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@@ -302,6 +302,17 @@ bool link(ArrayRef<const char *> argsArr, llvm::raw_ostream &stdoutOS,
   } else if (!args.hasArg(OPT_strip_all)) {
     add("-debug:dwarf");
   }
+  if (auto *a = args.getLastArg(OPT_build_id)) {
+    StringRef v = a->getValue();
+    if (v == "none")
+      add("-build-id:no");
+    else {
+      if (!v.empty())
+        warn("unsupported build id hashing: " + v + ", using default hashing.");
+      add("-build-id");
+    }
+  } else
+    add("-build-id");
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ZequanWu wrote:

Done.

https://github.com/llvm/llvm-project/pull/71433