[bug#50812] [PATCH v2 1/5] gnu: Add proj 7.2.1.

[Felix Gruber <felgru@posteo.net>]

On 9/27/21 2:49 PM, Guillaume Le Vaillant wrote:
> Hi,
> 
> Instead of adding a proj-7 package, wouldn't it be possible to update
> the proj package (which is currently at version 6.3.1).

You're right, that works. I've updated the proj package to 7.2.1 and of
the packages depending on proj (obtained with `guix refresh -l proj`)
all but the following two build: python-hyperkitty and itk-snap.
I've checked that those two packages already fail to build with proj
6.3.1 due to build failures in non-proj-related dependencies.

It thus seems safe to update proj directly instead of adding a new
proj-7 package.

> Also, according to [1], the current version of proj is 8.1.1. Can't the
> newer version be used instead of 7.2.1?
> 
> [1] https://proj.org/download.html

Updating to proj 8.1.1 unfortunately breaks many dependent packages as
proj 8.0.1 removed the deprecated proj_api.h API which apparently is
still widely used.

[1] https://proj.org/news.html#id47

After updating proj to 8.1.1 the following dependencies failed to build:

* `/gnu/store/004411fgpblva5gp33xc6l7ri93snsk3-vxl-2.0.2.drv'
* `/gnu/store/1p04p9zk2n4p78izl77n4d3bm15pn7xj-qmapshack-1.15.2.drv'
* `/gnu/store/3lvgc4vbrjck0q55sac038pm4r8674mp-itk-snap-3.8.0.drv'
* `/gnu/store/49f67f3lxfsnpph9qaamwf5jw4dz02i4-saga-7.9.0.drv'
* `/gnu/store/547lhnc9w46iwx6v6ysr0ij7jjmgd7d9-r-hierfstat-0.5-7.drv'
* `/gnu/store/7rjgcsmrpaxgm80nsaka1hgabhk20iq2-r-rastervis-0.50.3.drv'
* `/gnu/store/8r4d9gis8bxxh78b7v3di9w7jfbjp81g-r-zonebuilder-0.0.2.drv'
* `/gnu/store/agv23snqvrdf92pk8rw3wfxp1vb4x9rr-r-tmaptools-3.1-1.drv'
*
`/gnu/store/b4y5li1ffq86zrp3vg2hadi5c8q5cip5-r-spectre-0.5.5-1.f6648ab.drv'
* `/gnu/store/bmqqrl99c8srywankdsv75p8vmgs612i-postgis-3.1.2.drv'
* `/gnu/store/cb3bspgrsi43c41f6n8gryycwdj6an1k-insight-toolkit-4.13.2.drv'
* `/gnu/store/fxh3jwq1652vrns40vqn0j6jgn9096sv-r-rmetasim-3.1.14.drv'
* `/gnu/store/hg69zwr6xjdf84y0gjmgldrmnhc6h63m-osm2pgsql-1.2.2.drv'
* `/gnu/store/pxlq4xn2fj91zil2j8d225gwc27p16fp-r-zoon-0.6.5.drv'
* `/gnu/store/r37iqmzgz00kpk3z93jqrigmjwsp9hv4-r-zonator-0.6.0.drv'
* `/gnu/store/s8y7j2hhfb4bsifl15s8l5cixgh2ka1r-qgis-3.16.3.drv'
* `/gnu/store/vl4ssl7zj6lxkp3dz0mnx3ncs1syihdm-insight-toolkit-5.0.0.drv'
*
`/gnu/store/x9qrim5fbpxcf66c9y99kjzrcf439fki-spatialite-gui-2.1.0-beta1.drv'
*
`/gnu/store/xhn1xr91q36x4skl7jkxawnz28qjcjcy-python-cartopy-0.19.0.post1.drv'
*
`/gnu/store/y1yyq3w87yn2mph3bmpq10208m0n637j-r-cicero-monocle3-1.3.2-1.fa2fb65.drv'
* `/gnu/store/z1l6xjswk905pwb4ibwpl8z2yjjrf8vl-python-hyperkitty-1.3.3.drv'


So for now, I propose to update proj to 7.2.1 which is the last version
that still includes proj_api.h and which thus still lets us build all
the packages that depend on proj.

I'll send a v4 of the patchset with this change.

Best,
Felix