<<load_signals>> <# <=
<<load_signals>>  
on-load <PFE-SIG>
the signals-constructor will declare the available system signals as contants - usually sth. like SIGALRM or SIGHUP or SIGABRT

some signals are only valid in specific systems, like SIGBREAK or SIGMSG or SIGVIRT

reference: p4_load_signals in ../src/signals.c:0549, export CX <<load_signals>>