Spinlock support for linux-hppa?

What is needed to provide spinlock support for linux on hppa?

make[5]: Entering directory `/build/buildd/postgresql-7.4.1/build-tree/postgresql-7.4.1/src/backend/access/transam'
...
hppa-linux-gcc -O2 -fno-strict-aliasing -g -Wall -Wmissing-prototypes -Wmissing-declarations -pipe -I../../../../src/include -D_GNU_SOURCE -I/usr/include/tcl8.4 -I/usr/lib/R/include -c -o xlog.o xlog.c
In file included from ../../../../src/include/storage/spin.h:50,
from xlog.c:37:
../../../../src/include/storage/s_lock.h:543:2: #error PostgreSQL does not have native spinlock support on this platform. To continue the compilation, rerun configure using --disable-spinlocks. However, performance will be poor. Please report this to pgsql-bugs(at)postgresql(dot)org(dot)
make[5]: *** [xlog.o] Error 1

Full build log at http://buildd.debian.org/fetch.php?&pkg=postgresql&ver=7.4.1-1&arch=hppa&stamp=1072828455&file=log&as=raw
--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight, UK http://www.lfix.co.uk/oliver
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C
========================================
"The LORD shall preserve thy going out and thy coming
in from this time forth, and even for evermore."
Psalms 121:8