[gdal-dev] Configuring GDAL 1.11.1 to use GEOS

[Ari Jolma]

18.05.2016, 00:57, William Kelly Magee kirjoitti:
> 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?

Kelly,

I've never come across problems like this with GEOS and GDAL. If GEOS is 
in usual place (/usr/local/lib for example) GDAL configure picks it up 
by default.

It sounds a bit like you did not install GEOS. Did you issue "make 
install" after building GEOS?

Ari

>
> Thanks,
>
> Kelly
>
>
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