Fangrui Song 0b7f125219 [llvm-symbolizer] Add back --version and add a -v alias
The switch from llvm::cl to OptTable (D83530) dropped --version, which
is needed by some users.

This patch also adds a -v alias, which is available in GNU addr2line.

The version dumping is similar to llvm-objcopy --version (exotic):

```
llvm-symbolizer
LLVM (http://llvm.org/):
  LLVM version 12.0.0git
  Optimized build with assertions.
  Default target: x86_64-unknown-linux-gnu
  Host CPU: skylake-avx512
```

Reviewed By: dyung, jhenderson

Differential Revision: https://reviews.llvm.org/D85624
2020-08-10 08:21:43 -07:00
..
2019-07-04 21:19:05 +00:00
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