🚀 go-pugleaf

recently, I was given an old 10 Mhz 68000 Unix machine, a kontron psi 9068,
with a defective hard disk. As the manufacturer was near by, I got it fixed,
and am now playing 'sysop' at home without getting killed by our 
'real' sysadmins here. The Unix is an AT&T based system 7 , but 
limited to 7 character variable names. So I would like to compile an old 
(slender!) version of gcc for this machine. However, sources for gcc I found
so far contain longer variable names, of course. So, before I spend weeks 
replacing variable names , my question arises: Has anybody had the same 
problem and has already converted gcc sources to  7character variable names, or does an old version exist with such? The version could be a very old one, newer ones could probably be compiled with the help of the first running version...

Any help would be highly appreciated!

Thanks in advance,  

-Burkhard.