They could previously give the wrong sign on the remainder in certain cases where one or both of the arguments were negative, because they were using the wrong condition to decide whether to negate it.
This exits the programs without calling atexit functions and possibly without doing other clean-up operations. In ORCA/C, it is functionally identical to _exit().
Previously, it just ran an Execute shell call with NULL as the command-line pointer.
The fix is to still call Execute, but with an empty string as the command line, and then check if the call gave an error. If running under plain GS/OS, this gives an error for an unknown system call, whereas both ORCA/APW and GNO shells will return with no error in this case. (Golden Gate doesn't implement the Execute shell call, so it also gives an error and will report no command processor available.)
This fixes issue #25.
Stephen Heumann
Kelvin Sherlock
mikew50