[llvm-ranlib] Change -v (alias for --version) to -V

-V prints the version information in both BSD and GNU ar/ranlib.

BSD ranlib rejects -v while -v enables verbose output in GNU ar but is
another alias for --version in GNU ranlib. The GNU ranlib behavior is
inconsistent: `ranlib -v` is different from `ar -sv`. But it's not a
major concern in practice:

* Users typically use ranlib solely for creating archive symbol tables,
  and they don't need verbose output.
* Verbose output in ranlib seems a no-op.
* GNU ar creates an archive symbol table by default. Many ranlib uses
  have been eliminated.
* Modern linkers like lld/ELF (since version 14) and mold don't rely on
  archive symbol tables anymore.

https://reviews.llvm.org/D71554 introduced -v. This patch removes it so
that `llvm-ranlib -v` and `llvm-ranlib -version` lead to errors (GNU
ranlib rejects `-version` as well). -V is added as an alias for
--version.

Close #87654

Pull Request: #87661

Author: MaskRay

llvm/docs/ReleaseNotes.rst

@@ -174,6 +174,10 @@ Changes to the LLVM tools
 * llvm-ar now allows specifying COFF archive format with ``--format`` argument
   and uses it by default for COFF targets.
 
+* llvm-ranlib now supports ``-V`` as an alias for ``--version``.
+  ``-v`` (``--verbose`` in llvm-ar) has been removed.
+  (`#87661 <https://github.com/llvm/llvm-project/pull/87661>`_)
+
 * llvm-objcopy now supports ``--set-symbol-visibility`` and
   ``--set-symbols-visibility`` options for ELF input to change the
   visibility of symbols.

llvm/test/tools/llvm-ranlib/help-message.test

@@ -5,13 +5,22 @@
 # RUN: llvm-ranlib -help | FileCheck %s --check-prefix=HELP
 # RUN: llvm-ranlib --help | FileCheck %s --check-prefix=HELP
 # RUN: llvm-ranlib --version | FileCheck %s --check-prefix=VERSION
-# RUN: llvm-ranlib -version | FileCheck %s --check-prefix=VERSION
-# RUN: llvm-ranlib -v | FileCheck %s --check-prefix=VERSION
+# RUN: llvm-ranlib -V | FileCheck %s --check-prefix=VERSION
 
 ## Also check combined options (first -h/-v flag wins)
 # RUN: llvm-ranlib -Dh | FileCheck %s --check-prefix=HELP
-# RUN: llvm-ranlib -Dvh | FileCheck %s --check-prefix=VERSION
-# RUN: llvm-ranlib -Dhv | FileCheck %s --check-prefix=HELP
+# RUN: llvm-ranlib -DVh | FileCheck %s --check-prefix=VERSION
+# RUN: llvm-ranlib -DhV | FileCheck %s --check-prefix=HELP
 
 # HELP: USAGE: llvm-ranlib
 # VERSION: version
+
+## -v enables verbose output in BSD ranlib and GNU ar but is another alias
+## for --version in GNU ranlib. Reject -v.
+# RUN: not llvm-ranlib -v 2>&1 | FileCheck %s --check-prefix=ERR1
+# RUN: not llvm-ranlib -version 2>&1 | FileCheck %s --check-prefix=ERR2
+# RUN: not llvm-ranlib -Dvh 2>&1 | FileCheck %s --check-prefix=ERR3
+
+# ERR1: error: Invalid option: '-v'
+# ERR2: error: Invalid option: '-version'
+# ERR3: error: Invalid option: '-vh'

llvm/tools/llvm-ar/llvm-ar.cpp

@@ -65,7 +65,7 @@ static void printRanLibHelp(StringRef ToolName) {
          << "USAGE: " + ToolName + " archive...\n\n"
          << "OPTIONS:\n"
          << "  -h --help             - Display available options\n"
-         << "  -v --version          - Display the version of this program\n"
+         << "  -V --version          - Display the version of this program\n"
          << "  -D                    - Use zero for timestamps and uids/gids "
             "(default)\n"
          << "  -U                    - Use actual timestamps and uids/gids\n"
@@ -1439,7 +1439,7 @@ static int ranlib_main(int argc, char **argv) {
         } else if (arg.front() == 'h') {
           printHelpMessage();
           return 0;
-        } else if (arg.front() == 'v') {
+        } else if (arg.front() == 'V') {
           cl::PrintVersionMessage();
           return 0;
         } else if (arg.front() == 'X') {