SIGILL

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Utilities library
Program support utilities
Program termination abort exit quick_exit (C++11) _Exit (C++11) atexit at_quick_exit (C++11) Execution outcome indicators EXIT_SUCCESS EXIT_FAILURE Communicating with the environment system getenv Signals signal raise Signal handling strategies SIG_DFL SIG_IGN SIG_ERR Signal types SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM Non-local jumps setjmp longjmp Types jmp_buf

Defined in header <csignal>
#define SIGILL /*implementation defined*/

The SIGILL macro expands into an integral expression, defining a signal number. This signal represents invalid program image, such as invalid instruction.

[edit] See also

signal	sets a signal handler for particular signal (function)
raise	runs the signal handler for particular signal (function)