cargo:warning=src/zlib/gzlib.c:214:15: error: implicitly declaring library function 'snprintf' with type 'int (char *, unsigned long, const char *, ...)' [-Werror,-Wimplicit-function-declaration]
  cargo:warning=        (void)snprintf(state->path, len + 1, "%s", (const char *)path);
  cargo:warning=              ^
  cargo:warning=src/zlib/gzlib.c:214:15: note: include the header <stdio.h> or explicitly provide a declaration for 'snprintf'
  cargo:warning=1 error generated.