[lld-macho] Move a bunch of options into the "obsolete" category

[int3]

Summary

These are mostly things that ld64 has itself marked obsolete.
In the case of -sectorder, it's suggested in ld64's manpage that it
could be deprecated, so let's skip implementing it for now.

lld/MachO/Options.td

 def dead_strip : Flag<["-"], "dead_strip">,
      HelpText<"Remove unreachable functions and data">,
      Flags<[HelpHidden]>,
      Group<grp_opts>;
 def order_file : Separate<["-"], "order_file">,
      MetaVarName<"<file>">,
      HelpText<"Layout functions and data according to specification in <file>">,
      Group<grp_opts>;
-def sectorder : MultiArg<["-"], "sectorder", 3>,
-     MetaVarName<"<segname> <sectname> <orderfile>">,
-     HelpText<"Replaced by more general -order_file option">,
-     Flags<[HelpHidden]>,
-     Group<grp_opts>;
 def no_order_inits : Flag<["-"], "no_order_inits">,
      HelpText<"Disable default reordering of initializer and terminator functions">,
      Flags<[HelpHidden]>,
      Group<grp_opts>;
 def no_order_data : Flag<["-"], "no_order_data">,
      HelpText<"Disable default reordering of global data accessed at launch time">,
      Flags<[HelpHidden]>,
      Group<grp_opts>;
def seg_page_size : MultiArg<["-"], "seg_page_size", 2>,
      HelpText<"Specifies the page <size> for <segment>. Segment size will be a multiple of its page size">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def dylib_file : Separate<["-"], "dylib_file">,
      MetaVarName<"<install_path:current_path>">,
      HelpText<"Specify <current_path> as different from where a dylib normally resides at <install_path>">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
-def prebind : Flag<["-"], "prebind">,
-     HelpText<"This option is obsolete">,
-     Flags<[HelpHidden]>,
-     Group<grp_rare>;
 def weak_reference_mismatches : Separate<["-"], "weak_reference_mismatches">,
      MetaVarName<"<treatment>">,
      HelpText<"Resolve symbol imports of conflicting weakness according to <treatment> as weak, non-weak, or error (default is non-weak)">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def read_only_relocs : Separate<["-"], "read_only_relocs">,
      MetaVarName<"<treatment>">,
      HelpText<"Handle relocations that modify read-only pages according to <treatment> of warning, error, or suppress (i.e., allow)">,
def final_output : Separate<["-"], "final_output">,
      MetaVarName<"<name>">,
      HelpText<"Specify the dylib install name if -install_name is not used--used by compiler driver for multiple -arch arguments">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def arch_multiple : Flag<["-"], "arch_multiple">,
      HelpText<"Augment error and warning messages with the architecture name">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
-def twolevel_namespace_hints : Flag<["-"], "twolevel_namespace_hints">,
-     HelpText<"This option is obsolete">,
-     Flags<[HelpHidden]>,
-     Group<grp_rare>;
 def dot : Separate<["-"], "dot">,
      MetaVarName<"<path>">,
      HelpText<"Write a graph of symbol dependencies to <path> as a .dot file viewable with GraphViz">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def keep_relocs : Flag<["-"], "keep_relocs">,
      HelpText<"Retain section-based relocation records in the output, which are ignored at runtime by dyld">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def warn_stabs : Flag<["-"], "warn_stabs">,
      HelpText<"Warn when bad stab symbols inside a BINCL/EINCL prevent optimization">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def warn_commons : Flag<["-"], "warn_commons">,
      HelpText<"Warn when a tentative definition in an object file matches an external symbol in a dylib, which often means \"extern\" is missing from a variable declaration in a header file">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def read_only_stubs : Flag<["-"], "read_only_stubs">,
      HelpText<"On i386, make the __IMPORT segment of a final linked image read-only">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
-def slow_stubs : Flag<["-"], "slow_stubs">,
-     HelpText<"This option is obsolete">,
-     Flags<[HelpHidden]>,
-     Group<grp_rare>;
 def interposable_list : Separate<["-"], "interposable_list">,
      MetaVarName<"<path>">,
      HelpText<"Access global symbols listed in <path> indirectly">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def no_function_starts : Flag<["-"], "no_function_starts">,
      HelpText<"Do not creates a compressed table of function start addresses">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def no_objc_category_merging : Flag<["-"], "no_objc_category_merging">,
      HelpText<"Do not merge Objective-C categories into their classes">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def object_path_lto : Separate<["-"], "object_path_lto">,
      MetaVarName<"<path>">,
      HelpText<"Retain any temporary mach-o file in <path> that would otherwise be deleted during LTO">,
      Group<grp_rare>;
-def lto_library : Separate<["-"], "lto_library">,
-     MetaVarName<"<path>">,
-     HelpText<"Deprecated & ignored. LLD supports LTO directly, without using an external dylib.">,
-     Group<grp_rare>;
 def cache_path_lto : Separate<["-"], "cache_path_lto">,
      MetaVarName<"<path>">,
      HelpText<"Use <path> as a directory for the incremental LTO cache">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def prune_interval_lto : Separate<["-"], "prune_interval_lto">,
      MetaVarName<"<seconds>">,
      HelpText<"Prune the incremental LTO cache after <seconds> (-1 disables pruning)">,
def no_dead_strip_inits_and_terms : Flag<["-"], "no_dead_strip_inits_and_terms">,
      Group<grp_deprecated>;
 def noall_load : Flag<["-"], "noall_load">,
      HelpText<"Unnecessary option: this is already the default">,
      Flags<[HelpHidden]>,
      Group<grp_deprecated>;
 
 def grp_obsolete : OptionGroup<"obsolete">, HelpText<"OBSOLETE">;
 
+def sectorder : MultiArg<["-"], "sectorder", 3>,
+     MetaVarName<"<segname> <sectname> <orderfile>">,
+     HelpText<"Obsolete. Replaced by more general -order_file option">,
+     Group<grp_obsolete>;
+def lto_library : Separate<["-"], "lto_library">,
+     MetaVarName<"<path>">,
+     HelpText<"Obsolete. LLD supports LTO directly, without using an external dylib.">,
+     Group<grp_obsolete>;
 def y : Joined<["-"], "y">,
      MetaVarName<"<symbol>">,
      HelpText<"This option is obsolete in ld64">,
      Flags<[HelpHidden]>,
      Group<grp_obsolete>;
 def sectobjectsymbols : MultiArg<["-"], "sectobjectsymbols", 2>,
      MetaVarName<"<segname> <sectname>">,
      HelpText<"This option is obsolete in ld64">,

 def fvmlib : Flag<["-"], "fvmlib">,
      HelpText<"This option is obsolete in ld64">,
      Flags<[HelpHidden]>,
      Group<grp_obsolete>;
 def run_init_lazily : Flag<["-"], "run_init_lazily">,
      HelpText<"This option is obsolete in ld64">,
      Flags<[HelpHidden]>,
      Group<grp_obsolete>;
+def prebind : Flag<["-"], "prebind">,
+     HelpText<"This option is obsolete in ld64">,
+     Flags<[HelpHidden]>,
+     Group<grp_obsolete>;
+def twolevel_namespace_hints : Flag<["-"], "twolevel_namespace_hints">,
+     HelpText<"This option is obsolete in ld64">,
+     Flags<[HelpHidden]>,
+     Group<grp_obsolete>;
+def slow_stubs : Flag<["-"], "slow_stubs">,
+     HelpText<"This option is obsolete in ld64">,
+     Flags<[HelpHidden]>,
+     Group<grp_obsolete>;
 
 def grp_undocumented : OptionGroup<"undocumented">, HelpText<"UNDOCUMENTED">;
 
 def add_ast_path : Flag<["-"], "add_ast_path">,
      HelpText<"This option is undocumented in ld64">,
      Flags<[HelpHidden]>,
      Group<grp_undocumented>;
 def add_linker_option : Flag<["-"], "add_linker_option">,