Re: Very annoying Flymake regression in Emacs 26.1

[Eli Zaretskii <eliz@gnu.org>]

> From: João Távora <joaotavora@gmail.com>
> Date: Fri, 11 May 2018 22:35:50 +0100
> 
>  1. Navigate to a foo.c file
>  2. Turn on M-x flymake-mode
>  3. Because the legacy "proc" backend is active by default, flymake
>  calls it and it makes its usual foo_flymake.c copies before doing its
>  thing which is to call "CHK_SOURCES=foo_flymake.c make check-syntax"
>  4. If there isn't such a target in the Makefile, or if there isn't any Makefile,
>  the backend reports a failure and flymake.el considers it disabled.
>  5. Nothing wrong until here, the problem is that the foo_flymake.c in
>  step 3 is never cleaned up, and this starts littering the filesystem
>  everytime you visit a .c file.

Is the above scenario the usual way of using Flymake, or is it some
variation that could be rare?  If it isn't rare, I wonder how come no
one noticed until now that we are littering the filesystem with these
files.

Thanks.