compilation errors on SGI Indy R4000 with IRIX 6.5.9

dear folks,

as a newby to postgresql i tried to compile PostgreSQL 7.0.3 on my SGI
Indy R4000 running IRIX 6.5.9 but failed.
the error message gmake (version 3.79.1) generated was:

root.peter:/IRIX/postgresql-7.0.3/src 61> gmake
gmake -C utils all
gmake[1]: Entering directory
`/import/boot_data/IRIX/postgresql-7.0.3/src/utils'
gcc -I../include -I../backend    -U_NO_XOPEN4 -woff
1164,1171,1185,1195,1552 -Wl,-woff,15 -Wl,-woff,84 -Wall
-Wmissing-prototypes -Wmissing-declarations   -c -o version.o version.c
gcc: cannot specify -o with -c or -S and multiple compilations
gmake[1]: *** [version.o] Error 1
gmake[1]: Leaving directory
`/import/boot_data/IRIX/postgresql-7.0.3/src/utils'
gmake: *** [all] Error 2

can anybody tell me what i did wrong?

thanks,
mark