I analyzed the problem in PR port-sparc64/11506 a bit and came to the
   conclusion that it's a bad volatile cast in the ksh source.
   
   But then additional toolchain lossage strikes, and I couldn't reproduce it
   with a small example. So here the real code:


if i compile ksh/jobs.c with -O0, ksh works.  yay compiler bugs!?!?


.mrg.