Symbol.map

/*
 * This only needs to contain symbols that are not listed in
 * symbol maps from other parts of libc (i.e., not found in
 * stdlib/Symbol.map, string/Symbol.map, sys/Symbol.map, ...).
 */
FBSD_1.0 {
	_mcount;
	__flt_rounds;
	brk;
	fpgetmask;
	fpgetround;
	fpgetsticky;
	fpsetmask;
	fpsetround;
	sbrk;
};