I compile following statement
signal(SIGHUP,sig_hup);
kill(getpid(),SIGTSTP);
$gcc test.c
it raise following error:
error:'SIGHUP' undeclared (first use in this function)
error:'SIGTSTP' undeclared (first use in this function)
Why raise above error? which head file include 'SIGHUP','SIGTSTP' define?
Thanks