__attribute__nonnull__(pTHX_1);
#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
-PERL_CALLCONV Signal_t Perl_sighandler(int sig, ...);
-PERL_CALLCONV Signal_t Perl_csighandler(int sig, ...);
+PERL_CALLCONV Signal_t Perl_sighandler(int sig, siginfo_t *info, void *uap);
+PERL_CALLCONV Signal_t Perl_csighandler(int sig, siginfo_t *info, void *uap);
#else
PERL_CALLCONV Signal_t Perl_sighandler(int sig);
PERL_CALLCONV Signal_t Perl_csighandler(int sig);