byacc(1) on FreeBSD
The text 5665f9488274, as FreeBSD 3.2-RELEASE, FreeBSD 3.1-RELEASE, FreeBSD 3.0-RELEASE shipped it.
an LALR(1) parser generator
Flags it lists
-
-b -
-d -
-l -
-o -
-p -
-r -
-t -
-v