// Minimal signal.h stub for freestanding
#ifndef _SIGNAL_H
#define _SIGNAL_H

typedef int sig_atomic_t;
typedef void (*sighandler_t)(int);

#define SIG_DFL ((sighandler_t)0)
#define SIG_IGN ((sighandler_t)1)
#define SIG_ERR ((sighandler_t)-1)

#define SIGABRT 6
#define SIGFPE  8
#define SIGILL  4
#define SIGINT  2
#define SIGSEGV 11
#define SIGTERM 15

sighandler_t signal(int signum, sighandler_t handler);
int raise(int sig);

#endif /* _SIGNAL_H */