On Tue, 26 Aug 2025 at 17:24, Patrick Gundlach <patr...@gundla.ch> wrote:

> >
> > Btw it says
> > Compiled with libharfbuzz 11.4.1; using 11.4.1
> > while texlive is already at  harfbuzz 11.4.4
> > I have to update the repo.
> > Are you using the latest harfbuzz ?
>
> I am using the latest LuaTeX from
> https://gitlab.lisn.upsaclay.fr/texlive/luatex which writes "Synced with
> TeXLive rev. 76097."
>
> I think the harfbuzz is new enough in that repository (11.4.1). IMO (but I
> am not an expert) the default Makefile compiles (and links) only
> libharfbuzz.a, but should also compile and link libharfbuzz-subset.a.
>
> libharfbuzz.a is enough for the default luaharfbuzz API but lacks the
> subsetting API. My goal is to use the subsetting API so I can use variable
> fonts create a new face on the fly without using external tools.
>
>
>
Ok, I have just pushed a new commit, so we are in sync with texlive, at
least for the  moment.

About libharfbuzz-subset.a:
Have you modified
source/texk/web2c/luatexdir/am/luaharfbuzz.am
?
Once you've done it, you need to run source/reautoconf

--
luigi
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