[Bug c++/28589] cannot call a variadic C++ function

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28589

--- Comment #1 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Hannes Domani <ssbssa@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1d2f86b6b74e6caae77951353a4c353ce9816374

commit 1d2f86b6b74e6caae77951353a4c353ce9816374
Author: Hannes Domani <ssbssa@yahoo.de>
Date:   Sun Nov 14 16:19:31 2021 +0100

    Allow calling of variadic C++ functions

    Currently, it's not possible to call a variadic C++ function:
    ```
    (gdb) print sum_vararg_int(1, 10)
    Cannot resolve function sum_vararg_int to any overloaded instance
    (gdb) print sum_vararg_int(2, 20, 30)
    Cannot resolve function sum_vararg_int to any overloaded instance
    ```

    It's because all additional arguments get the TOO_FEW_PARAMS_BADNESS
    rank by rank_function, which disqualifies the function.

    To fix this, I've created the new VARARG_BADNESS rank, which is
    used only for additional arguments of variadic functions, allowing
    them to be called:
    ```
    (gdb) print sum_vararg_int(1, 10)
    $1 = 10
    (gdb) print sum_vararg_int(2, 20, 30)
    $2 = 50
    ```

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28589
    Approved-By: Tom Tromey <tom@tromey.com>

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