bug#49220: luajit doesn't support powerpc64le

[Chris Marusich <cmmarusich@gmail.com>]

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Chris Marusich <cmmarusich@gmail.com> writes:

> I checked their email list and website, but I can't find information
> about whether the LuaJIT project is actively working on support for
> powerpc64le architecture specifically.  I'll ask their email list
> (luajit@freelists.org) in a moment, and we'll see what they say.

It's been about 7 months.  There has been no reply on the luajit email
list, or on the GitHub pull request mentioned earlier.  It seems
unlikely that luajit will support powerpc64le-linux support soon.

For this reason, I have removed powerpc64le-linux from luajit's
supported-systems in commit ecb3f1b96a5895999cd800187b2197a78b56760a on
master.

LuaJIT is a dependency, either direct or indirect, of about 58 packages:

  $ guix refresh -l luajit
  Building the following 39 packages would ensure 58 dependent packages
  are rebuilt: arcan-sdl@0.5.5.2-1.b4dd1fb arcan-wayland@0.5.5.2-1.b4dd1fb
  xarcan@0.5.4-1.8e6ee02 knot-resolver@5.4.4 evisum@0.6.0 ephoto@1.6.0
  edi@0.8.0 enlightenment@0.25.1 terminology@1.12.1 lekha@0.2.1 rage@0.4.0
  econnman@1.1 epour@0.7.0 jami-qt@20210606.1.e2f9490
  jami-gnome@20210606.1.e2f9490 pinentry-efl@1.2.0 eovim@0.2.0
  mrrescue@1.02e love-nuklear@2.6.1 instead@3.3.5
  solarus-quest-editor@1.6.5 tome4@1.7.4 naev@0.9.1 mrg@0.1.4
  bpftrace@0.11.4 rspamd@2.7 hexchat@2.16.0
  minetest-mobs-animal@2021-11-14 minetest-worldedit@1.3
  minetest-unified-inventory@2021-12-26 minetest-mesecons@1.2.1-0.db58797
  minetest-homedecor-modpack@2021-12-26 minetest-coloredwood@2021-04-14-1
  minetest-technic@2021-09-11 minetest-basic-trains@1.0.1
  minetest-throwing-arrows@1.1-0.059cc89 minetest-ethereal@1.29-0.7670c1d
  luakit@2.3 nginx-lua-module@0.10.16

Most of them depend indirectly on luajit via the "efl" and "minetest" packages:

  guix graph --type=reverse-bag luajit | dot -Tpng > /tmp/luajit-reverse-bag.png

Here's the graph:


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Given the lack of PowerPC 64 bit support and the lack of interest in
supporting the architecture, people who want to use those packages on
powerpc64le-linux will either need to add and maintain that support or
figure out how to modify the package definitions to avoid the dependency
on luajit entirely.

-- 
Chris

PGP: https://savannah.gnu.org/people/viewgpg.php?user_id=106836

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