7.4.11 HP-UX ia64 build error

I'm having trouble building 32-bit pgsql 7.4.11 on the latest
release of HP-UX 11.23 on ia64, and need a little help.

Here's my compiler:
cc: HP aC++/ANSI C B3910B A.06.05 [Jul 25 2005]

Here's my error:

cc -L../../src/port -Wl,+b
-Wl,/opt/pgsql/installs/postgresql-7.4.11-32bit-aCC/lib -Wl,-z
-Wl,-E access/SUBSYS.o bootstrap/SUBSYS.o catalog/SUBSYS.o
parser/SUBSYS.o commands/SUBSYS.o executor/SUBSYS.o lib/SUBSYS.o
libpq/SUBSYS.o main/SUBSYS.o nodes/SUBSYS.o optimizer/SUBSYS.o
port/SUBSYS.o postmaster/SUBSYS.o regex/SUBSYS.o
rewrite/SUBSYS.o storage/SUBSYS.o tcop/SUBSYS.o utils/SUBSYS.o
-lc -lgen -ldld -lnsl -ldl -lm -lpgport -o postgres
ld: Unsatisfied symbol "tas" in file access/SUBSYS.o
1 errors.
gmake[2]: *** [postgres] Error 1

My 32-bit pgsql 8.1.2 build works on this platform using HP's
ansi C compiler.

Could anyone knowledgeable advise on a patch to make 7.4.11 build
here?

Thanks,
Ed