Inorder for /usr/src/usr.bin/xlint/lint1 code to link
I must define YYDEBUG with a 'set YYDEBUG=1;export YYDEBUG' or
I will get a link error that yydebug is undefined. 

This 'yydebug' variable is defined in main1.c

Does this have to do with how yacc was built?

What is the proper way to fix this?

-Rob