Thanks for the helpful replies.
I updated libtools on my Linux box, ran autoconf.sh and got configure. Moved it all to the SGI and ran configure ok.
Now on to gmake ... Ran ok, started ./bin/pd didn't run. Looking at stderr output: error: bind: Address family not supported by protocol family (124).
Still looks like an IPv6 issue, albeit s_net.c has the AI_PASSIVE force in it.