Building GCG7.3 on SunOS 4.1.3

[Pat Monardo]

I am using f77 2.0 to compile all of GCG7.3,
hoping eventually to make some modifications. I get a BUS error
when I try to read sequences however. I suspect that
it is due to VMS alignment of records invoked with the -xl
option. Can anyone offer advice on building GCG?