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.
Pleasereport this to pgsql-bugs@postgresql.org.
 
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.Elphick@lfix.co.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