That is what my problem is, the structure with sa_sigaction exists in the sigaction.h include file, it also does incorporate the 3 return arguments (instead of just signo), but I cannot get it to compile on our system.  This solution was one I found on the internet after searching for signal handlers on Linux systems.  I tried a plethera of different #define flags to see if I could force it to use the correct version of the sigaction structure with the added arguments, but to no avail.  I cannot get this to work on the Linux system using gcc or icc.  Is there another way to do it using icc?  I have to be able to capture the signal, print the call stack, and re-display the Motif window notifying the operator that a signal was caught so that they can gracefully exit the process and notify a analyst to take a look at it.  The call stack printing is to assist the analyst with what the process was doing when it received a signal.  Everything works with the first solution, except that it prints the "new" call stack containing just the signal handler information.  The only solution I can find to get to the previous stack frame "old" call stack, was the routine #2 solution.  According to the include files on the system, the system should support the second solution, I just can't figure out what I am missing to get it to compile.