bug#45934: native-comp - Dylib ID of ELN files not optimal

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 28 Jan 2021 21:59:16 +0000
> Cc: 45934@debbugs.gnu.org
> From: akrl--- via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> +/* On MacOS set a unique dylib ID (Bug#45934). */
> +#if defined (LIBGCCJIT_HAVE_gcc_jit_context_add_driver_option) \
> +  && defined (DARWIN_OS)
> +  gcc_jit_context_add_driver_option (
> +    comp.ctxt,
> +    SSDATA (concat2 (build_string ("-install_name "),
> +		     Ffile_name_nondirectory (filename))));
> +#endif

A minor nit unrelated to the issue at hand: if you take care to
mention the bug number in the commit log message, there's no need to
do that in the comments.

In general, I don't think it's a good idea to have our sources full of
references to bug reports; if the comment by itself doesn't explain
the underlying issue, it is better to enhance the comment to be
self-contained.  IMO, a reference to a bug in the comments is only
justified when the issue is so complicated to explain that having such
an explanation in comments is impractical.

TIA