[llvm-bugs] [Bug 45271] New: When suffixed with a version, llvm-strip is no longer recognized as llvm-strip

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45271

            Bug ID: 45271
           Summary: When suffixed with a version, llvm-strip is no longer
                    recognized as llvm-strip
           Product: tools
           Version: 10.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: llvm-objcopy/strip
          Assignee: unassignedbugs at nondot.org
          Reporter: natechancellor at gmail.com
                CC: alexander.v.shaposhnikov at gmail.com,
                    jake.h.ehrlich at gmail.com,
                    jh7370.2008 at my.bristol.ac.uk,
                    llvm-bugs at lists.llvm.org, rupprecht at google.com

Debian's apt.llvm.org symlinks all of the LLVM binaries from
/usr/lib/llvm-<num>/bin to /usr/bin/<tool_name>-<num> (e.g.
/usr/lib/llvm-11/bin/clang -> /usr/bin/clang-11) so that multiple versions of
clang can be installed and used at one time without stepping over each other.

After commit c54959c00d0 ("Introduce llvm-install-name-tool"), llvm-strip fails
to work in this configuration (as initially reported at
https://github.com/ClangBuiltLinux/linux/issues/940):

llvm-strip-11: error: unknown argument '-o'

This is because 'strip' is required to be the ending to the binary after this
change, whereas before the binary merely needed to contain 'strip'. I am not
familiar enough with LLVM data structures to try and fix this myself, hence
this report (maybe moving back to using sys::path::stem(...).contains(...)?).

Should you need to reproduce:

```
$ ln -s llvm-strip llvm-strip-11
$ echo | ./clang -c -x c - -o test.o
$ ./llvm-strip-11 -o test-stripped.o test.o
```

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