[postgis-devel] Problems installing PostGIS 2.0SVN on PostgreSQL 9.1

[Sandro Santilli]

On Fri, Nov 18, 2011 at 05:27:13PM +0100, webste2 at web.de wrote:

>    I downloaded PostGIS from SVN. Some problem with revisions 8173, 8000 and
>    7950.
...
>    ERROR:  could not load library "/usr/local/pgsql/lib/postgis-2.0.so":
>    /usr/local/pgsql/lib/postgis-2.0.so: undefined symbol:
>    GEOSRelatePatternMatch

What version of GEOS do you have installed ?
Multiple versions ? Do an:

 ldd /usr/local/pgsql/lib/postgis-2.0.so | grep geos

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