darcs patch: Support an interrupt flag, and primitive... (and 4 more)

[Tony Garnock-Jones]

Brian Rice wrote:
> Er, I meant to address this to Tony. Sorry, Nick. :)

OK, I've tried it on my mac. I took a copy of the head of main, with all 
patches applied, and cleaned up (make distclean and remove the libtool 
detritus). Typing "make" downloaded vm.c, vm.h, big.image as expected 
and tried to build a vm. Of course, the changes in boot.c don't work 
with the alpha vm.c, so I edited boot.c temporarily thus:

#if 0
     if (InterruptFlag != False) {
       InterruptFlag = False;
     } else {
       break;
     }
#else
     break;
#endif

... and next time, "make" succeeded. Then I did "make newboot", which 
went without a hitch; then "make VM=vm.new"; then "./vm.new 
big.new.image", which worked too.

Now I'm undoing the temporary hack to boot.c, and I'll see if the 
cooperative-threading thing works like it did on Linux last night.

Tony