GRASS 5.0b4 compile error

[Dr. Ralf Kunkel]

I am trying to compile GRASS 5.0 beta4 on SuSe Linux 6.2 and got the following error:

make[1]: Entering directory `/home/grass5.0beta/src/raster/r.binfer'
rm -f lex.c gram.c
yacc binfer.y
rm -f gram.c
mv y.tab.c gram.c
rm -f OBJ.i586-linux-elf/gram.o
gcc -g -O2   -I/home/grass5.0beta/src/include  -c gram.c
mv gram.o OBJ.i586-linux-elf/gram.o
lex binfer.l
make[1]: lex: Command not found
make[1]: *** [lex.c] Error 127
make[1]: Leaving directory `/home/grass5.0beta/src/raster/r.binfer'
GISGEN failure at STEP: src/raster/r.binfer
make: *** [do-install] Error 1


does anybody know to to solve this ??

Thanks in advance

Ralf Kunkel

**********************************************
Dr. Ralf Kunkel
Programmgruppe Systemforschung und Technologische Entwicklung
Forschungszentrum Juelich
D-52425 Juelich

Tel: 	++49-2461-61-3262		Fax: 	++49-2461-61-2540
EMail:	r.kunkel at fz-juelich.de	WWW:	http://www.kfa-juelich.de