[GRASS-Italia] compilazione Grass

[Alessandra]

Durante la compilazione di Grass ho riscontrato questo errore:

Errors in:
/home/ale/grass-6.0.2/lib/form
/home/ale/grass-6.0.2/visualization/nviz

provando il consiglio che mi è stato dato in lista:
cd lib/form
make
e
cd visualization/nviz
make

ho ottenuto il seguente output:
ale a ale-laptop:~/grass-6.0.2/visualization/nviz$
----------
togl.c:2973: error: request for member 'EpsMapSize' in something not a
structure or union
togl.c:2973: error: dereferencing pointer to incomplete type
togl.c:2973: error: request for member 'EpsBlueMap' in something not a
structure or union
togl.c:2973: warning: passing argument 2 of 'glPixelMapfv' makes integer
from pointer without a cast
togl.c:2973: warning: passing argument 3 of 'glPixelMapfv' from
incompatible pointer type
make[1]: *** [OBJ.i686-pc-linux-gnu/togl.o] Error 1
make[1]: Leaving directory
`/home/ale/grass-6.0.2/visualization/nviz/src'
make: *** [nvwish] Error 2

ale a ale-laptop:~/grass-6.0.2/lib/form$ make
gcc -Wl,--export-dynamic
-L/home/ale/grass-6.0.2/dist.i686-pc-linux-gnu/lib
-o /home/ale/grass-6.0.2/dist.i686-pc-linux-gnu/etc/form/form
OBJ.i686-pc-linux-gnu/form.o -lgrass_dbmiclient -lgrass_dbmibase
-lgrass_gis -lgrass_datetime -lz    -lgrass_datetime \
                                 -ltk8.0 -lm  -ltcl8.0 -lm -lm  -lz
/usr/bin/ld: cannot find - ltk8.0
collect2: ld returned 1 exit status
make: *** [/home/ale/grass-6.0.2/dist.i686-pc-linux-gnu/etc/form/form]
Error 1

Ma ora non so dove mettere le mani...
Avete qualche suggerimento?
Ho qualche speranza di risolverlo?

Grazie in anticipo

-- 
---
Alessandra