@MikeyC
These are the options:
a) SAS-C: only 68k, C++-part very primitive.
b) StormC: 68k, WOS complete C++ with IDE, easy to use.
c)HiSoft/MaxonC: 68k, one could say roughly an older version of StormC.
d) vbcc: 68k,WOS,PuP(?),MOS,free,no C++,no IDE
e) gcc: 68k,WOS,PuP,MOS,AROS,OS4,free,full C++, no IDE.
GoldED can serve as an (limited) IDE for the lasrt 2.