[ELF] - Remove Config->ZDefs flag.

[grimar]

Summary

-z defs is the same as --no-undefined (http://linux.die.net/man/1/ld).
It looks to be a error to handle it separatelly.

[grimar]

• Minor update

[grimar]

• One more minor update.

[ruiu]

ELF/Driver.cpp

366 ↗

(On Diff #62074)

Config->NoUndefined = Args.hasArg(OPT_no_undefined) || hasZOption(Args, "defs")

would be better.

[grimar]

ELF/Driver.cpp

366 ↗

(On Diff #62074)

Ok. I wanted to leave -z group along, but that also works.

[ruiu]

ELF/Driver.cpp

366 ↗

(On Diff #62074)

I understand, but |= seems too subtle.

[grimar]

• Addressed review comments.

[ruiu]

LGTM

lld/trunk/ELF/Config.h

struct Configuration {
   bool StripDebug;
   bool SysvHash = true;
   bool Threads;
   bool Trace;
   bool Verbose;
   bool VersionScriptGlobalByDefault = true;
   bool WarnCommon;
   bool ZCombreloc;
-  bool ZDefs;
   bool ZExecStack;
   bool ZNodelete;
   bool ZNow;
   bool ZOrigin;
   bool ZRelro;
   BuildIdKind BuildId = BuildIdKind::None;
   ELFKind EKind = ELFNoneKind;
   uint16_t EMachine = llvm::ELF::EM_NONE;

lld/trunk/ELF/Driver.cpp

void LinkerDriver::readConfigs(opt::InputArgList &Args) {
   Config->DiscardLocals = Args.hasArg(OPT_discard_locals);
   Config->DiscardNone = Args.hasArg(OPT_discard_none);
   Config->EhFrameHdr = Args.hasArg(OPT_eh_frame_hdr);
   Config->EnableNewDtags = !Args.hasArg(OPT_disable_new_dtags);
   Config->ExportDynamic = Args.hasArg(OPT_export_dynamic);
   Config->GcSections = Args.hasArg(OPT_gc_sections);
   Config->ICF = Args.hasArg(OPT_icf);
   Config->NoGnuUnique = Args.hasArg(OPT_no_gnu_unique);
-  Config->NoUndefined = Args.hasArg(OPT_no_undefined);
+  Config->NoUndefined =
+      Args.hasArg(OPT_no_undefined) || hasZOption(Args, "defs");
   Config->NoUndefinedVersion = Args.hasArg(OPT_no_undefined_version);
   Config->NoinhibitExec = Args.hasArg(OPT_noinhibit_exec);
   Config->Pie = Args.hasArg(OPT_pie);
   Config->PrintGcSections = Args.hasArg(OPT_print_gc_sections);
   Config->Relocatable = Args.hasArg(OPT_relocatable);
   Config->SaveTemps = Args.hasArg(OPT_save_temps);
   Config->Shared = Args.hasArg(OPT_shared);
   Config->StripAll = Args.hasArg(OPT_strip_all);
void LinkerDriver::readConfigs(opt::InputArgList &Args) {
   Config->LtoO = getInteger(Args, OPT_lto_O, 2);
   if (Config->LtoO > 3)
     error("invalid optimization level for LTO: " + getString(Args, OPT_lto_O));
   Config->LtoJobs = getInteger(Args, OPT_lto_jobs, 1);
   if (Config->LtoJobs == 0)
     error("number of threads must be > 0");
 
   Config->ZCombreloc = !hasZOption(Args, "nocombreloc");
-  Config->ZDefs = hasZOption(Args, "defs");
   Config->ZExecStack = hasZOption(Args, "execstack");
   Config->ZNodelete = hasZOption(Args, "nodelete");
   Config->ZNow = hasZOption(Args, "now");
   Config->ZOrigin = hasZOption(Args, "origin");
   Config->ZRelro = !hasZOption(Args, "norelro");
 
   if (Config->Relocatable)
     Config->StripAll = false;

lld/trunk/ELF/Writer.cpp

 };
 }
 
 template <class ELFT>
 static void reportUndefined(SymbolTable<ELFT> &Symtab, SymbolBody *Sym) {
   if (!Config->NoUndefined) {
     if (Config->Relocatable)
       return;
-    if (Config->Shared && !Config->ZDefs)
-      if (Sym->symbol()->Visibility == STV_DEFAULT)
-        return;
+    if (Config->Shared && Sym->symbol()->Visibility == STV_DEFAULT)
   }
 
   std::string Msg = "undefined symbol: " + Sym->getName().str();
   if (InputFile *File = Sym->getSourceFile<ELFT>())
     Msg += " in " + getFilename(File);
   if (Config->NoinhibitExec)
     warning(Msg);
   else