This is to see if the sources can be built. It is not an attempt to make them run on Mac.
See this about Jam on Mac.
“unzip main.zip” produces directories “__MACOSX” and “main”. I don’t know what that’s all about. There is little of interest in __MACOSX. The content of main is plausible.
I “cd main” and “jam”. The first problem is that this version of gcc does not know the “-mv8” option which directs the compiler to produce SPARC code for model v8 SPARCs. This is no surprise. I delete line “CCFLAGS = -mv8 ;” and subsequent text “-mv8” from Jamrules.
Source file src/kernel/sun4m/genassym.c wants header keyh.h . src/include/sparc/keyh.h is the right file, I think. I don't see the command line for gcc. I guess I must learn some Jam.
I remember thinking that the tree of .c files was poorly organized. This was a result of shifting concepts of modularity over several years. I might try a flat directory for each of