New version of PARI/GP: 2.4.3 svn-12577

Relevant tickets

9343: PARI upgrade
9591: genus2reduction
9592: lcalc (see also 9775 for a later version of lcalc)
9722: PARI/GP build error on Fedora 13

Files

If you want to upgrade an existing Sage, you need the install 3 spkg's and apply 2 patches. Do this in order as in the list below. In particular, the genus2reduction spkg will not install without the new pari spkg.

PARI spkg: http://sage.math.washington.edu/home/jdemeyer/spkg/pari-2.4.3.svn-12577.p3.spkg
genus2reduction spkg: http://sage.math.washington.edu/home/jdemeyer/spkg/genus2reduction-0.3.p8.spkg
lcalc spkg: http://sage.math.washington.edu/home/jdemeyer/spkg/lcalc-20100428-1.23.p2.spkg
Patch for data/extcode: extcode_9343_combined3.patch
Patch for devel/sage: sagelib_9343_combined7.patch

For reviewers

Download sage-4.6.prealpha2.tar, which is a complete Sage distribution based on sage-4.5.3.alpha1. Just extract it, and type make. In this file, the following tickets have been merged:
- 9343 (needs_work): PARI upgrade
- 9591 (needs_review): genus2reduction
- 9592 (needs_review): lcalc
- 9750 (positive_review): Document that PARI no longer assumes more than GRH
- 9636 (needs_review): Catch output from PARI in Sage
- 9400 (needs_review): modify the NumberField constructor to pass in optional integer B such that all the internal pari routines will replace the discriminant by its gcd with B, making some things massively faster
  - This ticket is not strictly related to the PARI upgrade, but it changes a lot of code using PARI. It also fixes an issue with nfinit() and wraps some additional functions in sage/libs/pari/gen.pyx.
The main issue seems to be making sure it actually compiles.
- Once it compiles, you can run the PARI/GP test suite by doing
  - ```
       env SAGE_CHECK=yes ./sage -f pari-2.4.3.svn-12577.p3.spkg
```
For reference, these are the patches for the spkg's:
- pari
- genus2reduction (note that old genus2reduction.c file was not under revision control unfortunately)
- lcalc

Debugging PARI/GP build errors

If the new pari spkg doesn't build, you should try building PARI/GP stand-alone (i.e. outside of Sage). You should download pari-2.4.3.svn-12577.p3.spkg and then type the following in a shell:

tar xjf pari-2.4.3.svn-12577.p3.spkg
cd pari-2.4.3.svn-12577.p3/src
./Configure --graphic=none
make gp

If this works, there is a bug in Sage's build process for PARI/GP. If this gives errors, this indicates an upstream issue with PARI/GP. In any case, any errors should be reported on the Sage trac.

Known issues