Wrong SFCGAL version used for compiling PostGIS 3.6.0 on Ubuntu?

[Scott]

Hey Regina,

postgis-3.5.3:
./configure \
    --with-gdalconfig=/export/path/local/bin/gdal-config \  # gdal 3.11.3
    --with-geosconfig=/bin/geos-config \                    # pkg 3.11.1
    --with-sfcgal=/bin/sfcgal-config \                      # pkg 1.4.1
    --with-pgconfig=/usr/lib/postgresql/15/bin/pg_config

Note: gdal is built from source with sfcgal 2.3.0 and geos 3.14 and 
installed in non-standard location.

3.5.3, if I use --prefix to install it in a non-standard location, make 
install ignores it and puts postgis-3.so in /usr/lib/postgresql/15/lib 
anyways.

Configuring 3.6.0 with --prefix set to non-standard location, I get this 
interesting message:

------------------------------------------------------------------------
   WARNING: You have set the --prefix to '/export/gis/local'. But we 
mostly
   ignore the --prefix. For your info, using the values determined from
   /usr/lib/postgresql/15/bin/pg_config we will be installing:
     * postgis shared library in /usr/lib/x86_64-linux-gnu
     * postgis SQL files in /usr/share/postgresql/15/contrib/postgis-3.6
------------------------------------------------------------------------



On 9/3/25 14:37, Regina Obe wrote:
>> On debian 12, PG 15, gdal 3.6.2 is the latest system pkg.
>>
>> However, I've built PostGIS 3.5.3 with non-system pkg GDAL 3.11.3. That
>> GDAL version is built with the latest non-system pkg geos 3.14 and sfcgal
>> 2.3.0.
>>
>> I can build PostGIS with the latest non-system pkg GDAL, but not the latest
>> non-system pkg geos/sfcgal. Kinda weird.
>>
>> SELECT postgis_full_version();
>>
>> POSTGIS="3.5.3 aab5f55" [EXTENSION]
>> PGSQL="150"
>> GEOS="3.11.1-CAPI-1.17.1"
>> SFCGAL="SFCGAL 1.4.1,
>> CGAL 5.5.1,
>> BOOST 1.74.0"
>> PROJ="9.1.1
>>      NETWORK_ENABLED=OFF
>>      URL_ENDPOINT=https://cdn.proj.org
>>      USER_WRITABLE_DIRECTORY=/tmp/proj
>>      DATABASE_PATH=/usr/share/proj/proj.db" (compiled against PROJ 9.1.1)
>> GDAL="GDAL 3.11.3 "Eganville", released 2025/07/12"
>> LIBXML="2.9.14"
>> LIBJSON="0.16"
>> LIBPROTOBUF="1.4.1"
>> WAGYU="0.5.0 (Internal)" TOPOLOGY RASTER
>>
>>
> 
> What is your configure statement for building PostGIS.
> 
> Are you using the --with-geosconfig=/path/to/geos  --with-sfcgal=/path/to/sfcgal parameters.
> 
> I've been having issues building too when GDAL is installed in system.
> I suspect there is some messiness with GDAL depending on GEOS and raster depending on both GEOS and GDAL.
> 
> This seems to have gotten worse when I tried to build SFCGAL from scratch. But in my case I was using system GDAL which
> was using an older version of GEOS than what I custom built, so I was bound to have issues anyway.
>