Re: Supporting multiple python runtimes with automake

[Yuval Turgeman]

Hi,

Thanks for the feedback !  What you described is what we are doing today,
it does the job nicely, I just thought it would be nice to avoid 2 calls.
Honestly, both VPATH and my patch feel a little hackish to me, and the
existing way is not really that painful, I guess.  Your call, I will not be
offended if this gets rejected, as I wasnt 100% sure I should post this
anyway, but since I already played with it one night, I thought why not :)

Thanks !


On Jan 31, 2018 8:49 PM, "Mathieu Lirzin" <address@hidden> wrote:

Yuval Turgeman <address@hidden> writes:

> Because when I want to package an rpm, I have a single %build and
> %install in my spec, so my second call to configure will override the
> first, and then i will need to run make install. So the process would
> be result in something like
>
> (from %build)
> configure PYTHON=/usr/bin/python2
> make
> configure PYTHON=/usr/bin/python3
> make
> (from %install)
> make install
>
> which wont work (unless we move make install to %build i guess). With
> this patch, a single configure would nail both pythons, and make
> install would install the relevant files to their correct location.

What could be done is to use out-of-tree “VPATH” builds [1] to configure
and build with both python versions in different directories in the
‘%build’ phase and run ‘make install’ in each of these directories in
the ’%install’ phase.

Maybe something like this (totally untested :-)):
--8<---------------cut here---------------start------------->8---
%build
mkdir py2 && cd py2
../%configure PYTHON=/path/to/python2
%make_build
cd ..
mkdir py3 && cd py3
../%configure PYTHON=/path/to/python3
%make_build
cd ..

%install
%make_install -C py2
%make_install -C py3
--8<---------------cut here---------------end--------------->8---

It seems not ideal to handle distro specific packaging guidelines on the
upstream configuration side.  As a consequence I would rather avoid
adding macros to be run at configure time.

WDYT?

[1] https://www.gnu.org/software/automake/manual/html_node/VPATH-Builds.html

--
Mathieu Lirzin
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