We have tried compiling new S on a MIPS RS2030 workstation running
4_0 UMIPS with the system.h and mach.m from the iris.

Problems:
Had to compile and install the ratfor that came on with S.

$P/opt.r had compile errors based on external declarations.
(Since it isn't used except by old S, we just skipped it.)

$F/macro/Smakefile and $F/sabl/Smakefile had to have the echo command
that printed INTERNALS preceded by a "-" to avoid some strange
error condition from the echo.  It seems that echo *||echo foo
will print "foo" if there are more than some small number of files
in the current directory.

In $QPE/Makefile, define
SYSLIB = -lF77 -lI77 -lm -lmld -lbsd
