[PATCH] D24270: [ELF] Add support for -no-gc-sections flag

[Petr Hosek via llvm-commits]

phosek created this revision.
phosek added a reviewer: ruiu.
phosek added a subscriber: llvm-commits.
phosek added a project: lld.

This flag is supported by both BFD ld and gold and is occasionally used to negate the effect of -gc-sections flag.

https://reviews.llvm.org/D24270

Files:
  ELF/Driver.cpp
  ELF/Options.td

Index: ELF/Options.td
===================================================================
--- ELF/Options.td
+++ ELF/Options.td
@@ -106,6 +106,9 @@
 def no_demangle: F<"no-demangle">,
   HelpText<"Do not demangle symbol names">;
 
+def no_gc_sections: F<"no-gc-sections">,
+  HelpText<"Disable garbage collection of unused sections">;
+
 def no_gnu_unique: F<"no-gnu-unique">,
   HelpText<"Disable STB_GNU_UNIQUE symbol binding">;
 
Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -400,7 +400,7 @@
   Config->EnableNewDtags = !Args.hasArg(OPT_disable_new_dtags);
   Config->ExportDynamic = Args.hasArg(OPT_export_dynamic);
   Config->FatalWarnings = Args.hasArg(OPT_fatal_warnings);
-  Config->GcSections = Args.hasArg(OPT_gc_sections);
+  Config->GcSections = getArg(Args, OPT_gc_sections, OPT_no_gc_sections, false);
   Config->ICF = Args.hasArg(OPT_icf);
   Config->NoGnuUnique = Args.hasArg(OPT_no_gnu_unique);
   Config->NoUndefinedVersion = Args.hasArg(OPT_no_undefined_version);


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