This is picked up by "./configure --with-template=irix6" though
presumably the configure script could be updated.

Note that the LD entry gets overridden somewhere later.  My kludge for
linker errors such as

    ld -r -o SUBSYS.o heaptuple.o indextuple.o indexvalid.o printtup.o
    scankey.o tupdesc.o  
    ld: FATAL   12 : Expecting o32 objects: heaptuple.o is n32.

is to export the environment variable "SGI_ABI=-n32".


2) After running configure, edit config.h to get around the accept bug
   http://www.postgresql.org/mhonarc/pgsql-ports/2000-05/msg00042.html


3) Edit tests/regress/resultmap to add entries for IRIX.