[GRASS-dev] Min. req. of programming language standard support, GRASS GIS 8

[Markus Neteler]

On Fri, Feb 5, 2021 at 9:09 PM Markus Metz
<markus.metz.giswork at gmail.com> wrote:
> On Fri, Feb 5, 2021 at 8:29 PM Markus Metz <markus.metz.giswork at gmail.com> wrote:
> > On Thu, Feb 4, 2021 at 5:35 AM Vaclav Petras <wenzeslaus at gmail.com> wrote:
> >
> > > Similarly to the GDAL and PROJ issue where I don't think it is necessary to have GRASS C89/C++98 compliant when you need C++11 for GDAL anyway.
> >
> > The C code of GRASS master is currently compatible with a lot of GDAL and PROJ versions, also GDAL 1.xand PROJ 4.8.x which most likely do not require C++11 or C99. If we want to keep this compatibility, we need to stick with the lower C and C++ standards. Related to the question which currently supported production environments we want to support.
>
> My PR 1283 [0] is related to this discussion, it does not work with stock Centos 7, and the github test with Centos 7 is thus failing. Of course it is still possible to use GRASS master on Centos 7 as long as there is a more recent PROJ version (as in my setup).

Amusingly I am also the EPEL/Centos maintainer of PROJ
(https://src.fedoraproject.org/rpms/proj) but I believe that per
policy I cannot push a major version bump to the Centos repo. But I
don't really know and didn't study that too much. However, there is
"Fedora ELN" which provides PROJ 7 but I am not sure what ELN is for.

> I suggest removing the github test for Centos 7 and using Centos 8 instead, if possible.

Makes sense to me.

> This does not mean that GRASS master is no longer running on Centos 7, or similar old, but still supported OS's. This means that people who want to use GRASS master with those OS's need to update certain GRASS dependencies themselves. As long as those OS's support the minimum C and C++ standards required by GRASS.

+1

> Markus M
>
> [0] https://github.com/OSGeo/grass/pull/1283

markusN