make error: implicit declaration of function explicit_bzero about boat-x-framework HOT 1 CLOSED

void memzero(void *const pnt, const size_t len) {
#ifdef WIN32
SecureZeroMemory(pnt, len);
#elif defined(HAVE_MEMSET_S)
memset_s(pnt, (rsize_t)len, 0, (rsize_t)len);
#elif 0 // defined(HAVE_EXPLICIT_BZERO) // use this modification and compile ok.
explicit_bzero(pnt, len); // this line error
#elif defined(HAVE_EXPLICIT_MEMSET)
explicit_memset(pnt, 0, len);
#else
volatile unsigned char *volatile pnt = (volatile unsigned char *volatile)pnt;
size_t i = (size_t)0U;

while (i < len) {
pnt_[i++] = 0U;
}

from boat-x-framework.