software/slapos-testing: use gcc 8.5 on python2

SlapOS.Eggs.UnitTest-Master.Python2 also installs old scipy so it needs
old gcc

software/slapos-testing/software.cfg

@@ -42,6 +42,10 @@ parts =
 # Always build GCC for Fortran (see openblas).
 max_version = 0
 
+[gcc:python2]
+# use old gcc version for old scipy version used in python2
+part = gcc-8.5
+
 [bootstrap-slapos.recipe.cmmi]
 # install our develop version of slapos.recipe.cmmi before anything else,
 # otherwise it will be installed from pypi by dependencies.

[Thomas Gambier]

shouldn't this be moved to software-py2.cfg where we define

[python]
part = python2.7

?

/cc @kazuhiko

[Thomas Gambier]

or we move this to component/defaults.cfg ?

[Jérome Perrin]

I like this idea of moving it to software-py2.cfg, I did that a bit in an emergency and I forgot about software-py2.cfg. I will do this change unless somebody objects.

Doing it in component/defaults.cfg seems a bit too much, we might have python2 softwares not using scipy.

[Thomas Gambier]

I think @kazuhiko will do it. He wants to uniformise this setting.

[Kazuhiko Shiozaki]

If we put [gcc:python2] in component/default.cfg, all py2 SR will be built with gcc 8.5 even if they don't have scipy. So I just modified existing [gcc] for py2 scipy case to [gcc:python2] in dc91e5d4.