bug#70716: flymake-cc creates `-.o` files

[Eli Zaretskii <eliz@gnu.org>]

Ping! Spencer, would you please chime in?

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Sat, 29 Jun 2024 22:45:50 -0700
> Cc: João Távora <joaotavora@gmail.com>, sbaugh@catern.com, 
> 	mattias.engdegard@gmail.com, 70716@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Cc: 70716@debbugs.gnu.org
> >> From: João Távora <joaotavora@gmail.com>
> >> Date: Thu, 2 May 2024 14:13:49 +0100
> >>
> >> On Thu, May 2, 2024 at 2:10 PM Mattias Engdegård <mattias.engdegard@gmail.com> wrote:
> >>
> >>  `flymake-cc-use-special-make-target`, the standard value for `flymake-cc-command`, generates a
> >>  command like
> >>
> >>    make check-syntax CHK_SOURCES="-x c -c -"
> >>
> >>  which causes the compiler (at least Clang) to create the file `-.o` that is never cleaned up and whose
> >>  name is mysterious and awkward to remove.
> >>
> >>  What about the patch below?
> >>
> >>
> >> Copying in Spencer Baugh, the new Flymake maintainer.
> >
> > Spencer, any comments or suggestions or patches?
> >
> > Thanks.
> 
> Ping.
>