[gdal-dev] Configuring GDAL 1.11.1 to use GEOS

[William Kelly Magee]

Hello

I am trying to build GDAL with GEOS support on RHEL 6 (64-bit) and am 
getting nowhere fast!

I've been using the OGR api from gdal-1.11.1 for over a year with 
excellent results and now need to use the geometry methods that are only 
available with the inclusion of GEOS (else the message ERROR 6: GEOS 
support not enabled").

I've built geos-3.1.0 and the set the GDAL configure option 
"--with-geos" to point to "geos-config".  Initially this did not work as 
gdal configure was attempting to execute "geos-config" which did not 
have execute permission (doing a chmod 777 on "geos-config" resolved this).

GDAL builds fine and appears to partially recognize GEOS availability 
but cannot confirm "GEOSversion" in geos_c.  The following two lines are 
output from gdal configure;

         checking for GEOS version >= 3.1.0... yes
         checking for GEOSversion in -lgeos_c... no

At this point it looked like a search issue so I've updated the PATH and 
LIBRARY_PATH env vars to point to the geos "capri" directory containing 
"libgeos_c.la".  Still no luck.  Have tried copying libgeos_c.la to the 
gdal folder and /usr/local/lib but still no luck.

Going through the list I see where others have run across similar but 
not the same problem.

Does anyone have any suggestions on how to resolve this?

Thanks,

Kelly
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