[lld-macho] Ignore -dependency_info and its argument

XCode passes in this flag, which we do not yet implement. Skip
over the argument for now so we can at least successfully parse the
linker invocation.

Reviewed By: #lld-macho, compnerd

Differential Revision: https://reviews.llvm.org/D84485

lld/MachO/Options.td

@@ -456,6 +456,11 @@ def map : Separate<["-"], "map">,
      HelpText<"Writes all symbols and their addresses to <path>">,
      Flags<[HelpHidden]>,
      Group<grp_introspect>;
+def dependency_info : Separate<["-"], "dependency_info">,
+     MetaVarName<"<path>">,
+     HelpText<"Dump dependency info">,
+     Flags<[HelpHidden]>,
+     Group<grp_introspect>;
 
 def grp_symtab : OptionGroup<"symtab">, HelpText<"SYMBOL TABLE OPTIMIZATIONS">;
 
@@ -1098,10 +1103,6 @@ def demangle : Flag<["-"], "demangle">,
      HelpText<"This option is undocumented in ld64">,
      Flags<[HelpHidden]>,
      Group<grp_undocumented>;
-def dependency_info : Flag<["-"], "dependency_info">,
-     HelpText<"This option is undocumented in ld64">,
-     Flags<[HelpHidden]>,
-     Group<grp_undocumented>;
 def dyld_env : Flag<["-"], "dyld_env">,
      HelpText<"This option is undocumented in ld64">,
      Flags<[HelpHidden]>,

lld/test/MachO/silent-ignore.test

@@ -4,6 +4,7 @@ RUN:   -dynamic \
 RUN:   -no_deduplicate \
 RUN:   -lto_library /lib/foo \
 RUN:   -macosx_version_min 0 \
+RUN:   -dependency_info /path/to/dependency_info.dat \
 RUN:   -syslibroot /path/to/MacOSX.platform/Developer/SDKs/MacOSX.sdk
 RUN: not lld -flavor darwinnew -v --not-an-ignored-argument 2>&1 | FileCheck %s
 CHECK: error: unknown argument: --not-an-ignored-argument