conda-forge: Fix build of python3 spkg

[mkoeppe]

(split out from #32113)

CC: @isuruf

Component: porting

Author: Isuru Fernando

Branch/Commit: 3bcfde1

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/33055

[mkoeppe]

Branch: u/mkoeppe/conda_forge__fix_build_of_python3_spkg

[mkoeppe]

New commits:

7030a0f	Need rpath too when building python and override CONFIGURE_LDFLAGS only
5af7789	allow building with different compilers on debian/ubuntu
e5d336f	update compiling on debian patch

[mkoeppe]

Commit: e5d336f

[slel]

comment:3

Does this need review, or is more work needed?

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

a116c59	Need rpath too when building python and override CONFIGURE_LDFLAGS only
db32a42	allow building with different compilers on debian/ubuntu
3bcfde1	update compiling on debian patch

[sagetrac-git]

Changed commit from e5d336f to 3bcfde1

[mkoeppe]

comment:6

Rebased on current beta

[mkoeppe]

comment:7

tox -e docker-conda-forge-minimal -- python3 succeeds with this

[mkoeppe]

comment:8

And tox -e docker-debian-buster-minimal still works.

[mkoeppe]

Reviewer: Matthias Koeppe

[vbraun]

Changed branch from u/mkoeppe/conda_forge__fix_build_of_python3_spkg to 3bcfde1