zlibVersion
#define zlib_version zlibVersion()
ZEXTERN const char * ZEXPORT zlibVersion(void);
if (zlibVersion()[0] != myVersion[0]) {
} else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
zlibVersion());
fprintf(stderr, "%s\n", zlibVersion());
#define zlib_version zlibVersion()
ZEXTERN const char * ZEXPORT zlibVersion(void);