reportedly some programs (e.g. showkeys in the kbd package) use it.
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 7
#define SIGFPE 8
#define SIGKILL 9