[postgis-devel] moving liblwgeom forward

[Sandro Santilli]

On Fri, Aug 05, 2011 at 11:20:18AM -0700, Chris Hodgson wrote:
> Good to hear you've got some funding to do work on PostGIS!
> 
> I'm a little bit worried about the effects of installing liblwgeom
> into the system lib dir on the ability to have multiple different
> versions of PostGIS installed simultaneously (for development,
> testing, migration, etc.). Tell me this won't be any different than
> it is now and I'll probably believe you.

For the safest case we can always choose to link statically against
liblwgeom, but having a different version for each library is also
a possibility (that's what we use for the C++ geos library, having a
version which is always incompatible with the previous so that each
C-API library links to its corresponding C++ lib).

> I can't imagine a situation where it makes sense for liblwgeom to
> have a different version than postgis. IIRC the only reason they are
> separated is to provide a C-based interface to test the liblwgeom
> functions without having to go through postgres.

Well, the idea is to push this even further to provide GEOS + Proj4
+ some extra stuff (MakeClean, ConcaveHull, ...) in a single package
for others to build on (spatialite, qgis, mysql, ...).

No problem making this an incremental process.

--strk;

> 
> Cheers,
> Chris
> 
> Sandro Santilli wrote:
> >Guys, I've got some fundings to move liblwgeom forward.
> >
> >After moving all geos functions into it the next big step
> >seems to be cleaning up / extracting a streamlined and
> >documented API, working on build scripts and decide on a
> >version policy.
> >
> >Do you agree on having liblwgeom installed systemwide and
> >dynamically linked starting with PostGIS 2.0 ?
> >
> >Should liblwgeom versioning follow PostGIS version (easier) or
> >should we introduce a separate versioning scheme (stricter) ?
> >
> >For simplicity, I'd have it follow PostGIS version, starting
> >with 2.0. Comments are welcome.
> >
> >--strk;
> >
> >  ()   Free GIS & Flash consultant/developer
> >  /\   http://strk.keybit.net/services.html
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  ()   Free GIS & Flash consultant/developer
  /\   http://strk.keybit.net/services.html