[R-br] Erro ao instalar pacote rgeos no ubuntu

[Emerson Cotta Bodevan]

Prezados,

ao tentar instalar o pacote rgeos recebo a seguinte mensagem

> install.packages()
Installing package(s) into
‘/home/ecbodevan/R/i686-pc-linux-gnu-library/2.14’
(as ‘lib’ is unspecified)
tentando a URL 'http://cran-r.c3sl.ufpr.br/src/contrib/rgeos_0.2-7.tar.gz'
Content type 'application/x-gzip' length 181162 bytes (176 Kb)
URL aberta
==================================================
downloaded 176 Kb

* installing *source* package ‘rgeos’ ...
** package ‘rgeos’ successfully unpacked and MD5 sums checked
checking geos-config usability... ./configure: line 1342: geos-config:
command not found
no
configure: error: geos-config not usable
ERROR: configuration failed for package ‘rgeos’
* removing ‘/home/ecbodevan/R/i686-pc-linux-gnu-library/2.14/rgeos’

The downloaded packages are in
    ‘/tmp/RtmpZVdoma/downloaded_packages’
Mensagens de aviso perdidas:
In install.packages() :
  installation of package ‘rgeos’ had non-zero exit status
>

Alguém saberia a solução?

Agradeço qualquer ajuda.

Att.,
Emerson.
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