The problem is not what version of make that you use.
The actual problems is that the Makefile specifies the 64bit flags for
Sun's compiler.
Change:-
S64FLAGS=-xildoff -xarch=v9 -xchip=ultra -dalign -xcode=abs32
-DDO=pfil${SBITS}
to:-
S64FLAGS=-m64 -mcmodel=medlow -DDO=pfil${SBITS}
and try again.
Regards,
Adam