How to compile and use bug_signal_rt

Compile it with:
cc -Wall -g bug_signal_rt.c -o bug_signal_rt
to provide a sleep() mechanism

or:
cc -Wall -DPAUSE -g bug_signal_rt.c -o bug_signal_rt
to provide a pause() mechanism

Usage:
*run the program in background and note the PID:
./bug_signal_rt &
[3] 15424
Testing SIGNAL1=33 with signal 32 unblocked.

*send it a signal 33:
kill -33 15424
The signal 33 was received.
Testing SIGNAL1=33 with signal 33 unblocked.

*redo it:
kill -33 15424

*if nothing happens you can kill it:
kill -KILL 15424

What it should demonstrate:
In pause() the RT signals blocking methods are not working as specified/expected.
All signals >= 32 are blocked if the flag for signal 32 is set. Flags > 32 are taken into account. This problem doesn't happens in a sleep().

The program blocks all blockable signals execpted one and set an signal handler for signal 33. Then it call a sleep() or a pause() and when going out checks if the signal handler was called.
It does this procedure twice, first with signal 32 unblocked, second with signal 33 unblocked.