SIGHUP SIGGRANT SIGILL
SIGHUP  
...
signal constants as being defined on the local system. not all signal names must be valid in a specific system, the pfe will only export those being available.

The set of signal names being tested for during pfe compilation are described in W.R.Stevens'
"Advanced Programming in the UNIX Environment"

The signals constants are generated by their signal constructor <<load_signals>>

reference: SIGHUP in ../src/signals.c:0159, export never SIGHUP