[postgis-devel] ERROR: could not load library "/usr/local/pgsql/lib/liblwgeom.so.1.1": /usr/local/lib/libgeos_c.so.1: undefined symbol: _ZN4geos9WKBReader4readERSi

[GIS Nick]

Chris,

First up, sorry for the wrong posting location.

but... it worked a dream.  I hadn't removed ALL of the libs from /usr/lib. 

Thanks so much!

Nick

Chris Hodgson wrote:
> First of all this is probably a better question for the postgis-users 
> list, as it is about using postgis, not developing it. However, I 
> won't let that stop me from trying to help you.
>
> You seem to have two different versions of geos installed. The problem 
> with this is that because of the way they are installed, and the way 
> your system is configured (which is standard) your NEW geos_c library 
> is linking to your OLD geos library.
>
> By default in most linux distro's, /usr/lib is checked before 
> /usr/local/lib, so, since your older geos is installed in /usr/lib, it 
> gets chosen at run-time. So removing it is probably a good option. 
> That means all three files - not sure if you did that or not...
>
> Was mapserver compiled with geos support as well? Was it linked 
> against the old version? Do an ldd on mapserv to see. You may need to 
> recompile mapserver. Also, what do those two ldd's you show look like 
> after removing the old geos library? No missing links, hopefully?
>
> I hope that helps a bit!
>
> Chris
>
> GIS Nick wrote:
>> Hi there,
>>
>> I have been trying to get postgis working with mapserver.  I 
>> successfully installed postgis, loaded the  sql  scripts  (lwpostgis 
>> and spatial_ref) and successfully loaded a shp file into the database.
>>
>> However when I subsequently try to access the database through a .map 
>> file I get the following error:
>>
>> Postgresql reports the error as 'ERROR: could not load library 
>> "/usr/local/pgsql/lib/liblwgeom.so.1.1": 
>> /usr/local/lib/libgeos_c.so.1: undefined symbol: 
>> _ZN4geos9WKBReader4readERSi '
>>
>> I found a similar query from this thread here:  
>> "http://postgis.refractions.net/pipermail/postgis-devel/2006-January/001957.html" 
>> which explained that it may be necessary to remove the libgeos.so.2 
>> from /usr/lib.
>>
>> I did this and mapserver just gives me a 505 Internal Error.
>>
>> The result of
>>
>> ldd /usr/local/pgsql/lib/liblwgeom.so.1.1 /usr/local/lib/libgeos_c.so.1
>>
>> is:
>>
>> /usr/local/pgsql/lib/liblwgeom.so.1.1:
>>        linux-gate.so.1 =>  (0xffffe000)
>>        libgeos_c.so.1 => /usr/local/lib/libgeos_c.so.1 (0xb7e95000)
>>        libproj.so.0 => /usr/local/lib/libproj.so.0 (0xb7e60000)
>>        libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7d32000)
>>        libgeos.so.2 => /usr/lib/libgeos.so.2 (0xb7bf0000)
>>        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7b09000)
>>        libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7ae6000)
>>        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7adb000)
>>        /lib/ld-linux.so.2 (0x80000000)
>> /usr/local/lib/libgeos_c.so.1:
>>        linux-gate.so.1 =>  (0xffffe000)
>>        libgeos.so.2 => /usr/lib/libgeos.so.2 (0xb7dd5000)
>>        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7cef000)
>>        libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7ccc000)
>>        libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7b9e000)
>>        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7b92000)
>>        /lib/ld-linux.so.2 (0x80000000)
>>
>>
>> in /usr/lib/ I have :
>>
>> libgeos.so
>> libgeos.so.2
>> libgeos.so.2.1.1
>>
>>
>> in /usr/local/lib I have :
>>
>> libgeos.so
>> libgeos.so.2
>> libgeos.so.2.2.2
>>
>>
>> What the hell is going on???
>>
>> You may have gathered that I am a fully-fledged newbie in 
>> postgis/mapserver etc and a (relatively) newbie in Linux.
>>
>> I would really appreciate any help you can give me here
>>
>> Thanks,
>>
>> Nick
>>
>>
>>
>>
>>
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