1 #include <math.h> 2 #include <math_ldbl_opt.h> 3 #include <libm-alias-ldouble.h> 4 __fabsl(long double x)5 long double __fabsl (long double x) 6 { 7 return __builtin_fabsl (x); 8 } 9 libm_alias_ldouble (__fabs, fabs) 10