1#include <math_ldbl_opt.h>
2#include <sysdeps/ieee754/dbl-64/s_isnan.c>
3#if !IS_IN (libm)
4# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
5compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
6compat_symbol (libc, isnan, isnanl, GLIBC_2_0);
7# endif
8#endif
9

source code of glibc/sysdeps/ieee754/ldbl-opt/s_isnan.c