[lld] [LLD][COFF] Add support for including native ARM64 objects in ARM64EC images (PR #137653)

[Jacek Caban via llvm-commits]

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@@ -657,7 +656,7 @@ void LinkerDriver::setMachine(MachineTypes machine) {
 
   ctx.config.machine = machine;
 
-  if (machine != ARM64X) {
+  if (!isArm64EC(machine)) {
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cjacek wrote:

Yes, that’s right, this is the core part of the change; the rest of the patch updates various components to handle it properly. The extra `(EC symbol)` annotation doesn’t add much value when there’s only a single symbol table, but it becomes quite useful with this PR. If someone accidentally passes a native object file, error messages that include `(native symbol)` should make the issue easy to diagnose.

https://github.com/llvm/llvm-project/pull/137653