tox.ini: Add slackware environments

[mkoeppe]

This is to debug ​https://groups.google.com/d/msg/sage-devel/WshDn3e_l3k/-smgNej4AwAJ

​https://hub.docker.com/r/vbatts/slackware/tags

This enables the following tests:

   tox -e docker-slackware-14.2-minimal
   tox -e docker-slackware-14.2-standard

---

Random slackware links:

• ​https://software.jaos.org/#slapt-get

[mkoeppe]

New commits:

​883cd1e

tox.ini [docker-slackware-14.2]: New

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​3896794	Merge tag '9.1.beta8' into t/29354/tox_ini__add_slackware_environments
​bda9ebd	Add slackware package info

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​fbb7393

Fixup packages

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​cfcd8f2

build/bin/sage-guess-package-system, build/bin/sage-print-system-package-command: Handle slackware too

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​136feeb

build/bin/sage-spkg: Show equivalent system packages for ALL distros

[mkoeppe]

As noted in #29373 (Upgrade freetype) Need to add some certificates package so that https downloads of an upstream_url work:

  [freetype-2.10.1]   Attempting to download from https://download.savannah.gnu.org/releases/freetype/freetype-2.10.1.tar.gz
  [freetype-2.10.1]   [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
  [freetype-2.10.1]   ERROR [transfer|run:135]: [Errno socket error] [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:727)
  [freetype-2.10.1]   ************************************************************************
  [freetype-2.10.1]   Traceback (most recent call last):

[mkoeppe]

zlib not found in slackware-14.2-standard (​https://github.com/mkoeppe/sage/runs/524868652)

[dimpase]

they by default install zlib which is too old (1.2.8). they have 1.2.11 in patches/, so, interactively, one would use slackpkg to update. But automatically?

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​1cb8f98

build/pkgs/curl/distros/slackware.txt: Add openldap-client

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​eee2877	build/pkgs/slackware.txt: Add ca-certificates
​c1931f5	build/pkgs/curl/distros/slackware.txt: Add libssh2

[mkoeppe]

Mostly works now.

slackware-14.2-minimal: Error building git ​https://github.com/mkoeppe/sage/runs/527424423

slackware-14.2-standard-python2:

sage -t src/sage/matrix/matrix2.pyx  # Bad exit: 1

[mkoeppe]

Replying to dimpase:

they by default install zlib which is too old (1.2.8). they have 1.2.11 in patches/, so, interactively, one would use slackpkg to update. But automatically?

The workflow is getting zlib 1.2.11, and now it says configure: will use system package and not install SPKG zlib.

[mkoeppe]

Ready for review

[dimpase]

ok

[mkoeppe]

Thanks!

[mkoeppe]

Follow-up: #29424