Dev Anand - 2007-06-09

I am getting the following error any ideas ?

lex.yy.c:1334: warning: ‘yyunput’ defined but not used
cc -Wall -O2 -O -o function2ps function2ps.o data2ps.o analyze_function.o  -lfl -lm
cc -Wall -O2 -o draw_arrangement draw_arrangement.c -lm
make: *** No rule to make target `/usr/share/doc/linux-source-2.6.20/Makefile', needed by `title.ps'.  Stop.