vfprintf_l
int vfprintf_l(FILE * __restrict, locale_t, const char * __restrict,
ret = vfprintf_l(fp, loc, fmt, ap);
ret = vfprintf_l(stdout, loc, fmt, ap);
if ((ret = vfprintf_l(&f, loc, fmt, ap)) < 0)
__weak_alias(vfprintf_l, _vfprintf_l)
return vfprintf_l(stdout, loc, fmt, ap);