gnocky installation

[Andreas Nitsche]

Hello!

I tried to install gnocky but when I do ./configure I get this
errormessage. 

checking for gtk+-2.0 >= 2.0.0, glib-2.0 >= 2.0.0, gthread-2.0 >= 2.0.0,
libglade-2.0 >= 2.0, gnokii >= 0.5.7... Package gnokii was not found in
the pkg-config search path. Perhaps you should add the directory
containing `gnokii.pc' to the PKG_CONFIG_PATH environment variable No
package 'gnokii' found
configure: error: Library requirements (gtk+-2.0 >= 2.0.0, glib-2.0 >=
2.0.0, gthread-2.0 >= 2.0.0, libglade-2.0 >= 2.0, gnokii >= 0.5.7) not
met; consider adjusting the PKG_CONFIG_PATH environment variable if your
libraries are in a nonstandard prefix so pkg-config can find them.

What can I do?

Andi