[PATCH v3 1/8] tests: Allow tests to append tunables

[Yury Khrustalev]

On Thu, Apr 16, 2026 at 04:44:10PM +0200, Andreas Schwab wrote:
> On Apr 16 2026, Yury Khrustalev wrote:
> 
> > +# Concatenate elements in the list using colon.
> > +# Two spaces after 'subst' are intentional.
> > +emptystring :=
> > +spacestring := $(emptystring) # one space
> > +define join-with-col
> > +$(subst $(spacestring),:,$(strip $(1)))
> > +endef
> 
> We already use $(subst $(empty) ,:,...) in several places.
> 

There are indeed a few examples of this, thanks for pointing it out.

We could perhaps introduce

  define colon-join
  $(subst $(empty) ,:,$(strip $(1)))
  endef

and replace all of them with

  $(call colon-join,$(FOO))

which will be shorter than

  $(subst $(empty) ,:,$(strip $(FOO)))

I can add this change as a patch to this patch series.
I'm open to suggestions for a better name for this function.

Thanks,
Yury