need postgis_sfcgal wrapped as an extension

[robe]

right now the sfcgal.sql file is loose and requires separate manual handling.

This should be wrapped up as an extension to be installed similar to what we have with postgis_topology and postgis_tiger_geocoder.

[vmo]

creates postgis_sfcgal extension

[robe]

vmo changes I would make

Change:

MINORVERSION  = 2011.@POSTGIS_MAJOR_VERSION@.@POSTGIS_MINOR_VERSION@ 

to

MINORVERSION  = @POSTGIS_MAJOR_VERSION@.@POSTGIS_MINOR_VERSION@ 

get rid of requirement that it be installed in sfcgal schema. I think most people are just going to want to install it in the same schema as they install PostGIS especially since some of the functions PostGIS provides it supplants.

sql/sfcgal_upgrade_minor.sql build step use an upgrade minor script built by perl script strk has largely changed which can read availability info etc. This will make it less likely to be mangled by Sun Solaris sed, and also better able to handle Aggregates once you start adding those. I'm not sure if the perl script http://trac.osgeo.org/postgis/browser/trunk/utils/postgis_proc_upgrade.pl

needs some changing though. For now what you have is fine since functions should always be replaced and that is all you have so far.

[vmo]

robe, I made all required changes.

[robe]

committed at r12690 and r12689. Missed folder first time around.

I left out your change to postgis.control.in (where you changed the description to PostGIS SFCGAL functions). I assume that was a mistake.