#ifndef _EXECINFO_H #include extern int __backtrace (void **__array, int __size); libc_hidden_proto (__backtrace) extern char **__backtrace_symbols (void *const *__array, int __size); extern void __backtrace_symbols_fd (void *const *__array, int __size, int __fd); libc_hidden_proto (__backtrace_symbols_fd) #endif