[llvm-strip] Support grouped options in llvm-strip

GNU and Apple `strip` implementations seems to support grouped options.
Enable the support for grouped options introduced in
https://reviews.llvm.org/D83639 for `llvm-strip` invocations.

Includes test that checks that both the grouped and non grouped
invocations produces the same result.

Reviewed By: alexander-shaposhnikov, MaskRay

Differential Revision: https://reviews.llvm.org/D105249

test/tools/llvm-objcopy/grouped-options.test

@@ -0,0 +1,53 @@
+# This test checks that both grouped and ungrouped options (-S -x and -Sx)
+# produce exactly the same result given the same input.
+#
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-strip -S -x -o %t-strip-separated %t
+# RUN: llvm-strip -Sx -o %t-strip-grouped %t
+# RUN: cmp %t-strip-separated %t-strip-grouped
+
+# RUN: llvm-objcopy -S -x %t %t-objcopy-separated
+# RUN: llvm-objcopy -Sx %t %t-objcopy-grouped
+# RUN: cmp %t-objcopy-separated %t-objcopy-grouped
+
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tools/llvm-objcopy/ConfigManager.cpp

@@ -60,7 +60,9 @@ static const opt::OptTable::Info ObjcopyInfoTable[] = {
 
 class ObjcopyOptTable : public opt::OptTable {
 public:
-  ObjcopyOptTable() : OptTable(ObjcopyInfoTable) {}
+  ObjcopyOptTable() : OptTable(ObjcopyInfoTable) {
+    setGroupedShortOptions(true);
+  }
 };
 
 enum InstallNameToolID {
@@ -164,7 +166,7 @@ static const opt::OptTable::Info StripInfoTable[] = {
 
 class StripOptTable : public opt::OptTable {
 public:
-  StripOptTable() : OptTable(StripInfoTable) {}
+  StripOptTable() : OptTable(StripInfoTable) { setGroupedShortOptions(true); }
 };
 
 } // namespace