[lld/mac] Add -adhoc_codesign / -no_adhoc_codesign flags

These are new in Xcode 12's ld64. lld never codesigns at the moment, so
-no_adhoc_codesign doesn't even have to warn that it's not implemented.

diff --git a/lld/MachO/Options.td b/lld/MachO/Options.td
index 8e88c74..6928cf2 100644 (file)
--- a/lld/MachO/Options.td
+++ b/lld/MachO/Options.td
@@ -512,6 +512,13 @@ def grp_rare : OptionGroup<"rare">, HelpText<"RARELY USED">;
 def v : Flag<["-"], "v">,
      HelpText<"Print the linker version and search paths and exit">,
      Group<grp_rare>;
+def adhoc_codesign : Flag<["-"], "adhoc_codesign">,
+     HelpText<"Write an ad-hocd code signature to the output file.">,
+     Flags<[HelpHidden]>,
+     Group<grp_rare>;
+def no_adhoc_codesign : Flag<["-"], "no_adhoc_codesign">,
+     HelpText<"Do not write an ad-hocd code signature to the output file.">,
+     Group<grp_rare>;
 def version_details : Flag<["-"], "version_details">,
      HelpText<"Print the linker version in JSON form">,
      Flags<[HelpHidden]>,