use system's gf2x if available

[dimpase]

the usual spkg-configure.m4 thing

CC: @embray @kiwifb

Component: packages: standard

Author: Dima Pasechnik

Branch: 844e241

Reviewer: François Bissey

Issue created by migration from https://trac.sagemath.org/ticket/27238

[dimpase]

comment:2

the test is not sufficient to tell version 1.2 from 1.1

[dimpase]

Dependencies: #27212

[dimpase]

comment:5

One ought to be able to test for signature of a particular function in gf2x.h, which changed from 1.1 to 1.2.

[sagetrac-git]

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

a1ee9bd	spkg-configure.m4 for gf2x
6b61156	added a test for version >= 1.2

[sagetrac-git]

Changed commit from dbd7476 to 6b61156

[dimpase]

comment:7

gf2x takes long time to build, as it does tuning, so that's quite a building speedup.

[dimpase]

Changed dependencies from #27212 to none

[kiwifb]

comment:10

Is there a mix of tabs and white spaces in that file? Just looking at it in the browser, I didn't checkout the branch. Other than that it looks sound and should do the trick.

[sagetrac-git]

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

844e241

whitespaces adjusted, tabs removed

[sagetrac-git]

Changed commit from 6b61156 to 844e241

[dimpase]

comment:12

fixed whitespaces now, sorry.

[kiwifb]

comment:13

Those things are quite clear on the diff but I think they are harmless in M4. Let's move on.

[kiwifb]

Reviewer: François Bissey

[vbraun]

Changed branch from u/dimpase/packages/gf2x-config to 844e241

[dimpase]

comment:15

I've provided the upstream with a PR to do a pkg-config configuration, so this could be simplified eventually. See
dimpase/gf2x@c7cd1f2
and
https://gforge.inria.fr/tracker/index.php?func=detail&aid=21746&group_id=1874&atid=6979

[dimpase]

Changed commit from 844e241 to none