Re: [ptxdist] [PATCH] libgpiod: select HOST_SYSTEM_PYTHON3_DEV for Python bindings

[Markus Heidelberg via ptxdist <ptxdist@pengutronix.de>]

On Sun, May 25, 2025 at 03:50:17PM +0200, Michael Olbrich wrote:
> On Tue, May 20, 2025 at 02:21:51PM +0200, Markus Heidelberg via ptxdist wrote:
> > python3-config has to exist, available in python3-dev Debian package.
> > 
> > Fixes the following error in libgpiod prepare stage:
> > 
> >   checking for python3-config... false
> >   configure: error: python3-config not found - needed for python bindings
> > 
> > Signed-off-by: Markus Heidelberg <m.heidelberg@cab.de>
> > ---
> >  rules/libgpiod.in | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/rules/libgpiod.in b/rules/libgpiod.in
> > index 94bff5164..012223ff1 100644
> > --- a/rules/libgpiod.in
> > +++ b/rules/libgpiod.in
> > @@ -6,6 +6,7 @@ menuconfig LIBGPIOD
> >  	select HOST_SYSTEM_PYTHON3
> >  	select GCCLIBS_CXX	if LIBGPIOD_CXX
> >  	select PYTHON3		if LIBGPIOD_PYTHON3
> > +	select HOST_SYSTEM_PYTHON3_DEV	if LIBGPIOD_PYTHON3
> 
> No, this is wrong. The python3-config should come from the Python we use to
> build stuff for the target, so host-python/python.
> 
> We do some hacky stuff to combine the host-python binary with target python
> stuff to get a cross python to build stuff. Maybe that needs to be extended
> so that libgpiod will find python3-config?

I guess python3-config from sysroot-cross should be used, but there is
only python3.13-config. So I wonder whether

A) there is a symlink (or copy) missing:
   sysroot-cross/usr/bin/python3-config -> python3.13-config

B) libgpiod's configure.ac has to be patched:
   -python3-config
   +python3.13-config

Markus