Re: [ptxdist] [PATCH 1/2] host-cython: add new package

[Alexander Aring <alex.aring@gmail.com>]

On Fri, Mar 21, 2014 at 11:05:01AM +0100, Alexander Aring wrote:
> Hi Michael,
> 
> On Fri, Mar 21, 2014 at 10:32:00AM +0100, Alexander Aring wrote:
> > On Fri, Mar 21, 2014 at 10:00:55AM +0100, Michael Olbrich wrote:
> > > On Thu, Mar 13, 2014 at 02:06:44PM +0100, Alexander Aring wrote:
> > > > Signed-off-by: Alexander Aring <alex.aring@gmail.com>
> > > > ---
> > > > Hi,
> > > > 
> > > > I am not sure about the following points:
> > > > 
> > > > i) helptext: it's a host package with noprompt, but I saw a helptext in
> > > >    host-python also. That's why I add a help text here.
> > > > 
> > > > ii) Cython installs some site-packages which is needed by $(CROSS_PYTHON). I
> > > >     install things in --root=$(PTXCONF_SYSROOT_TARGET) because $(CROSS_PYTHON)
> > > >     used this as site-packages search path.
> > > 
> > > Both patches applied.
> > > 
> > > I changed this to "--root=$(HOST_CYTHON_PKGDIR)" and --prefix=. This way
> > > 'cython' runs just fine. I'm not sure anything else is needed. 'pyzmq'
> > > builds without error even if cython is not installed here. Please test.
> > > 
> > 
> > I read too fast the README on github. Cython is only needed if we build
> > from git repository but I need cython for other packages. I will test if
> > this still works. Thanks Michael.
> 
> Now I understand a little bit more. I installed it into
> PTXCONF_SYSROOT_TARGET because CROSS_PYTHON has the default
> site-packages search path there.
> 
> I know this was wrong because it is a host tool which should installed
> into PTXCONF_SYSROOT_HOST. I always search a way to change the default
> site-packages search path and now I found it! [1]
> 
> Your solution to install it into HOST_CYTHON_PKGDIR will install Cython
> into PTXCONF_SYSROOT_HOST which is correct, but then it doesn't work out
> of the box, because CROSS_PYTHON doesn't search in PTXCONF_SYSROOT_HOST.
> 
> With solution of [1] I can change the site-packages search path with:
> 
> "$(CROSS_ENV) PYTHONUSERBASE=$(PTXCONF_SYSROOT_HOST) $(CROSS_PYTHON)"
> 
> and then it works with a installed Cython in PTXCONF_SYSROOT_HOST.
> Please let me know if this is okay for you, maybe we can put this into
> the default $(CROSS_PYTHON) path. It seems Cython is some special thing,
> we need it only at compiletime and it have some cross compiled things in
> there. I don't know what happens if we set PYTHONUSERBASE and python
> uses still his default site-packages path or not.
> 

mhh, or we introduce a $(CROSS_CYTHON) (note the C instead P)
which is a:

"PYTHONUSERBASE=$(PTXCONF_SYSROOT_HOST) $(CROSS_PYTHON)"

call.

- Alex

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