Wrong SFCGAL version used for compiling PostGIS 3.6.0 on Ubuntu?

[Regina Obe]

> Hi,
> 
> I noticed 3.6.0 became available on Ubuntu 24.04 where I am currently
> running my PostgreSQL / PostGIS install.
> 
> However, after adding the 'postgis_sfcgal' extension and the PostGIS
> extension upgrades using "SELECT postgis_extensions_upgrade();", attempting
> to use the new 'CG_Simplify' function that requires SFCGAL in as SQL
> statement, leads to the following error:
> 
> "SQL Error [XX000]: ERROR: The SFCGAL version this PostGIS binary was
> compiled against (10501) doesn't support 'sfcgal_geometry_simplify'
> function (requires SFCGAL 2.1.0+)"
> 
> Is this is a possible error during the packaging for the latest release for
> Ubuntu?
> 
> Marco

I don't think so. Both GEOS and SFCGAL are considered system libraries by Ubuntu/Debian. So is GDAL.
As such they are usually at the version shipped with your OS.

You don't get a new version of those unless you are running with the latest Ubuntu version.