> > That might be a problem with 'byacc' and 'bison' compatibility. These > were seen at many places with many other packages. Even the 'bison -y' > i don't think is fully 'byacc' mode. As you can see after installing > bison the error goes away and 'make' is smooth as it has to be. But > for having that compatibility check we can add in configure.ac a better > check for yylval, and yylex function. Good suggestion, please send a patch to configure.ac to check for yylval avati -- ultimate_answer_t deep_thought (void) { sleep (years2secs (7500000)); return 42; }