Attempting to compile JonesForth on OS X, it throws:
jonesforth.S:1154:10: fatal error: 'asm/unistd.h' file not found".
So I tried this advice for Linux, but it still complains.
This PowerPC port throws other exceptions, like:
invalid instruction mnemonic 'bctr'
unexpected token in memory operand
Is there an OS X port around?
This port of JonesForth compiles on OS X.