Re: python311 vs expat

[Thomas Klausner <wiz%netbsd.org@localhost>]

On Fri, Mar 20, 2026 at 07:22:12AM +0100, Adam Ciarciński wrote:
> > This change broke both macOS and SunOS:
> > 
> > bac7175966909 (adam      2026-03-04 06:51:45 +0000  44) CONFIGURE_ARGS+=        --without-system-expat # requires expat_config.h
> > 
> > It means that python311 has both:
> > 
> >  CONFIGURE_ARGS+=        --with-system-expat
> >  CONFIGURE_ARGS+=        --without-system-expat # requires expat_config.h
> > 
> > I don't understand how this can work.  Does this even work on NetBSD?
> > 
> > I think it's clearly a regression on any other system, so if this is a NetBSD-specific hack then it needs to go in an .if OPSYS section, and I'd recommend a very good comment explaining why we have both --with and --without because that makes no sense to me.
> 
> The problem is, not every operating system provides 'expat_config.h', but pkgsrc thinks the external expat is fine.

I just tried building after providing an empty expat_config.h, and it
built fine.

So either provide that (manually for this package, or from the
expat/buildlink3.mk file), or just remove the include from
Modules/pyexpat.c - I don't see it using anything from that header
(the '#if's in it only check XML_COMBINED_VERSION, which is not
provided by that header anyway).

 Thomas