strtof
float strtof(const char * __restrict, char ** __restrict);
extern float strtof ANSI((CONST char *, char **));
__weak_alias(strtof, _strtof)
__weak_alias(strtof, _strtof)
if (u.f != strtof(ibuf, &se1) || se != se1)
#define NAN_STRTOD strtof
f = strtof(arg, &endp);
f = strtof(arg, &endp);
volatile float a = strtof("1.5", NULL);
volatile float b = strtof("0.0", NULL);
volatile float f = strtof(inf_strings[i], NULL);
volatile float f = strtof(nan_string, &end);