bundle of the oldest known recovered GNU GPL sources
from 1988 of gcc, g++, gdb and bison.
bison-1.00, gcc-1.21, g++-1.21, gdb-2.5.1, libg++-1.20

This does not compile on modern systems but can be done
with much work for fun, also good to read these sources.

The g++ has a small bison yacc parser for c++

