[m-rev.] for review: Defer SHARED_LIBS assignment in ml script.

[Peter Wang]

On Thu, 14 Dec 2023 15:12:31 +1100 Julien Fischer <jfischer at opturion.com> wrote:
> 
> On Thu, 14 Dec 2023, Peter Wang wrote:
> 
> > scripts/ml.in:
> >    Assign SHARED_LIBS only when it will actually be used,
> >    as the default value of SHARED_LIBS set by configure
> >    may invoke "gcc -print-libgcc-file-name" in a command substitution.
> 
> That's fine. Presuambly, this is just for performance reasons?

Yes, though I haven't tried to measure the difference.

I noticed it because nearly 80% the calls to ccache on my system were
"Uncacheable" and, of those, 94% were due to "No input file" --
likely most of those due to ml running "gcc -print-libgcc-file-name".

Peter