ecpg in REL7_3_2

I'm trying to compile a co of REL_7_3_2 for my laptop (initially a
suse 7.3 install) and it fails w/ this from bison:

make -C preproc all
make[1]: Entering directory `.../pgsql-server-7.3.2/src/interfaces/ecpg/preproc'
bison -y -d preproc.y
preproc.y:5560: fatal error: maximum table size (32767) exceeded
make[1]: *** [preproc.h] Error 1
make[1]: Leaving directory `.../pgsql-server-7.3.2/src/interfaces/ecpg/preproc'

I also tried using the HEAD version of preproc.y and that gave the
same error, but at line 5559.

Bison is 1.28. Yacc (version 91.7.30) gives a similar error.

Is this a know issue? Is it a bug in the installed versions of bison
and yacc? (It has been over a decade since I last wrote a bison/yacc
file, and I suspect I've forgotten most everything I knew about them.)

My workwaround for now was just to remove ecpg from
interfaces/Makefile....

-JimC