Compile Denis Simon's scripts with gp2c

[jdemeyer]

After merging Simon's scripts into one script, they are turned into C code by gp2c, which is then compiled into the Sage <-> PARI library interface.

Using them is exactly the same as using other PARI functions:

sage: EllipticCurve("389a1")._pari_().ellrank()
[2, 2, [[1/16, -9/64], [5/4, 5/8]]]

The focus of this ticket is really on making a general mechanism, not so much on Simon's scripts (in particular, simon_two_descent has not been changed). It should be very easy to add new scripts in the future.

Depends on #18874
Depends on #19860

CC: @embray

Component: interfaces

Author: Jeroen Demeyer

Branch/Commit: u/jdemeyer/ticket/15809 @ 86ef814

Issue created by migration from https://trac.sagemath.org/ticket/15809

[jdemeyer]

comment:2

Are we sure that this would yield a significant speed-up? I have not profiled this at all, but if most of the time is spent in PARI functions like bnfinit(), then gp2c will not help.

[jdemeyer]

Changed dependencies from #11005 to #258

[jdemeyer]

Changed dependencies from #258 to #258, #18874

[jdemeyer]

Changed dependencies from #258, #18874 to #258, #18874, #18583

[jdemeyer]

Branch: u/jdemeyer/ticket/15809

[sagetrac-git]

Commit: 9322e17

[sagetrac-git]

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

a6e0513	Remove duplicate global variables
e7cdb76	Add a gp2c optional package
fbd976e	Add fixes for PARI 2.8
2daa9ae	Add a patch to fix global()
ad14931	Merge commit '2daa9ae692d1f1fc2d1799aec0b57cae76022e41'; commit 'd9c97acc74bebfb486d55a9e35263851f42e6845' into t/18874/fix_braces_in_simon_scripts
9322e17	Compile Denis Simon's scripts with gp2c