Add --strip-all option back to llvm-strip.

Summary:
This option appears to have been dropped as part of the refactoring in
r331663. Unfortunately, if we want to use llvm-strip as a drop-in
replacement for strip, this option should still be available.

Reviewers: alexshap

Reviewed By: alexshap

Subscribers: meikeb, kongyi, chh, jakehehrlich, llvm-commits, pirama

Differential Revision: https://reviews.llvm.org/D49226

llvm-svn: 336921

llvm/test/tools/llvm-objcopy/strip-all.test

@@ -27,6 +27,14 @@
 # RUN: llvm-ar p %t.a > %t6
 # RUN: cmp %t2 %t6
 
+# RUN: cp %t %t7
+# RUN: llvm-strip -strip-all %t7
+# RUN: cmp %t2 %t7
+
+# RUN: cp %t %t8
+# RUN: llvm-strip --strip-all %t8
+# RUN: cmp %t2 %t8
+
 !ELF
 FileHeader:
   Class:           ELFCLASS64

llvm/tools/llvm-objcopy/StripOpts.td

@@ -11,6 +11,9 @@ defm output : Eq<"o">,
               MetaVarName<"output">,
               HelpText<"Write output to <file>">;
 
+def strip_all : Flag<["-", "--"], "strip-all">,
+                HelpText<"Remove non-allocated sections other than .gnu.warning* sections">;
+
 def strip_debug : Flag<["-", "--"], "strip-debug">,
                   HelpText<"Remove debugging symbols only">;
 

llvm/tools/llvm-objcopy/llvm-objcopy.cpp

@@ -655,6 +655,7 @@ CopyConfig ParseStripOptions(ArrayRef<const char *> ArgsArr) {
 
   Config.DiscardAll = InputArgs.hasArg(STRIP_discard_all);
   Config.StripUnneeded = InputArgs.hasArg(STRIP_strip_unneeded);
+  Config.StripAll = InputArgs.hasArg(STRIP_strip_all);
 
   if (!Config.StripDebug && !Config.StripUnneeded && !Config.DiscardAll)
     Config.StripAll = true;