#include<math.h>#include<stdio.h>#include<errno.h>longdouble__ieee754_atan2l(longdoublex,longdoubley){fputs("__ieee754_atan2l not implemented\n",stderr);__set_errno(ENOSYS);return0.0;}strong_alias(__ieee754_atan2l,__atan2l_finite)stub_warning(atan2l)