Add FedoraBuild for Fedora and RHEL

[vstinner]

Test ./configure --with-platlibdir=lib64 on Fedora and RHEL, but also
other configure flags used by the Fedora specfile, like
--enable-shared and --with-system-expat.

[vstinner]

Build / build (pull_request) Failing after 14s — build

"make" when installing Tempita in a venv:

error in Tempita setup command: use_2to3 is invalid.

See https://twitter.com/mitsuhiko/status/1435661088746577930

"Latest setuptools removes the ability to invoke 2to3 as part of the installation. With that Flask-OpenID broke which means that Airflow broke. I don't even have the energy to fix an ancient package at this point but apparently existing airflow installations are now screwed :-/"

flask-openid fix to avoid 2to3: pallets-eco/flask-openid#60

[vstinner]

For Tempita use_2to3 error, see: https://bugs.launchpad.net/sqlalchemy-migrate/+bug/1943127

[vstinner]

I also reported the issue to buildbot: buildbot/buildbot#6229

[vstinner]

error in Tempita setup command: use_2to3 is invalid.

I pushed a workaround: 73a70b5

[hroncok]

Adding options like this means we need to pull in the devel packages. Also, IIRC we can only use system mpdec in 3.10+

[stratakis]

The devel packages are already in the buildbots

[hroncok]

This only makes sense on 64bit arches.

[stratakis]

All the Fedora and RHEL buildbots are 64 bits.

[vstinner]

@hroncok @stratakis: I prefer to start easy, I disabled --with-system-expat, --with-system-ffi and --with-system-libmpdec. Let's see first how many buildbot workers are broken by this first incomplete change :-D

Also, I created one configuration per OS version:

• Fedora Stable
• Fedora Rawhide
• RHEL7
• RHEL8

For now, RHEL7 and RHEL8 are the same, so are Fedora Stable and Fedora Rawhide.

[vstinner]

s390x RHEL8 3.10: configure failed: https://buildbot.python.org/all/#/builders/700/builds/341

checking for valgrind/valgrind.h... no
configure: error: Valgrind support requested but headers not available

PPC64LE RHEL7 3.10: https://buildbot.python.org/all/#/builders/619/builds/311

(same Valgrind error)

s390x RHEL7 3.10: https://buildbot.python.org/all/#/builders/658/builds/351

(same Valgrind error)

s390x Fedora 3.10: https://buildbot.python.org/all/#/builders/655/builds/338

(same Valgrind error)

[hroncok]

That is because Valgrind has:

ExclusiveArch: %{ix86} x86_64 ppc ppc64 ppc64le s390x armv7hl aarch64

https://src.fedoraproject.org/rpms/valgrind/blob/rawhide/f/valgrind.spec#_230

Fedora's Python has:

# Support for the Valgrind debugger/profiler
%ifarch %{valgrind_arches}
%bcond_without valgrind
%else
%bcond_with valgrind
%endif

[vstinner]

I rebuilt "s390x RHEL8 3.10" without the Valgrind flag and it went a little bit further until...

checking for dtrace... not found
configure: error: dtrace command not found on $PATH

[vstinner]

I disabled Valgrind: d05087c

And DTrace: a013e17