cpython/Python/pyfpe.c

#include "pyconfig.h"
#include "pyfpe.h"
/*
 * The signal handler for SIGFPE is actually declared in an external
 * module fpectl, or as preferred by the user.  These variable
 * definitions are required in order to compile Python without
 * getting missing externals, but to actually handle SIGFPE requires
 * defining a handler and enabling generation of SIGFPE.
 */

#ifdef WANT_SIGFPE_HANDLER
jmp_buf PyFPE_jbuf;
int PyFPE_counter = 0;
#endif

/* Have this outside the above #ifdef, since some picky ANSI compilers issue a
   warning when compiling an empty file. */

double
PyFPE_dummy(void *dummy)
{
    return 1.0;
}