Trying to do a build of 9.1 alpha 1 on OpenIndiana snv_147 - issues with perl?

Trying to do a build of 9.1 alpha 1 on OpenIndiana snv_147 (Hooray - openSolaris reincarnated!), getting this error when trying to include perl in the build:

(We are using the GNU tools, btw).

... (many similar lines preceding)

strcmp 0x7c9 /usr/perl5/5.8.4/lib/i86pc-solaris-64int/auto/DynaLoader/DynaLoader.a(DynaLoader.o)
ld: fatal: relocations remain against allocatable but non-writable sections
collect2: ld returned 1 exit status
gmake[4]: *** [plperl.so] Error 1
gmake[4]: Leaving directory `/home/username/Downloads/postgresql-9.1alpha1/src/pl/plperl'
gmake[3]: *** [all] Error 2
gmake[3]: Leaving directory `/home/username/Downloads/postgresql-9.1alpha1/src/pl'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/home/username/Downloads/postgresql-9.1alpha1/src'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/home/username/Downloads/postgresql-9.1alpha1'
*** Error code 2
The following command caused the error:
IFS=':' ; \
for dir in $PATH; do \
for prog in gmake gnumake make; do \
if [ -f $dir/$prog ] && ( $dir/$prog -f /dev/null --version 2>/dev/null | grep GNU >/dev/null 2>&1 ) ; then \
GMAKE=$dir/$prog; \
break 2; \
fi; \
done; \
done; \
\
if [ x"${GMAKE+set}" = xset ]; then \
echo "Using GNU make found at ${GMAKE}"; \
${GMAKE} all ; \
else \
echo "You must use GNU make to build PostgreSQL." ; \
false; \
fi
make: Fatal error: Command failed for target `all'