open_memstream
FILE *open_memstream(char **, size_t *);
PROTO_NORMAL(open_memstream);
DEF_WEAK(open_memstream);
if ((fp = open_memstream(&buf, &size)) == NULL) {
f = open_memstream(&buf, &size);
if ((spif = open_memstream(&spibuf, &dummy)) == NULL) {
spif = open_memstream(&spibuf, &spisz);
flowf = open_memstream(&flowbuf, &flowsz);
if ((fp = open_memstream(&buf, &size)) == NULL) {