[lld] [lld-macho] Implement support for ObjC relative method lists (PR #86231)

[via llvm-commits]

================
@@ -1086,6 +1086,22 @@ static bool shouldEmitChainedFixups(const InputArgList &args) {
   return isRequested;
 }
 
+static bool shouldEmitRelativeMethodLists(const InputArgList &args) {
+  const Arg *arg = args.getLastArg(OPT_objc_relative_method_lists,
+                                   OPT_no_objc_relative_method_lists);
+  if (arg && arg->getOption().getID() == OPT_objc_relative_method_lists)
+    return true;
+  if (arg && arg->getOption().getID() == OPT_no_objc_relative_method_lists)
----------------
alx32 wrote:

Maybe I'm misunderstanding, but doesn't `args.getLastArg` get the last command line arg that matches. If both are passed, then only the last one is considered. Does the order matter here ? 

https://github.com/llvm/llvm-project/pull/86231