From: meissner@suse.de Subject: supply format arguments to gzprintf(). Index: zlib.h =================================================================== --- zlib.h.orig +++ zlib.h @@ -1465,7 +1465,11 @@ ZEXTERN z_size_t ZEXPORT gzfwrite OF((vo is returned, and the error state is set to Z_STREAM_ERROR. */ -ZEXTERN int ZEXPORTVA gzprintf(gzFile file, const char *format, ...); +ZEXTERN int ZEXPORTVA gzprintf(gzFile file, const char *format, ...) +#ifdef __GNUC__ + __attribute__((__format__(__printf__,2,3))) +#endif +; /* Convert, format, compress, and write the arguments (...) to file under control of the string format, as in fprintf. gzprintf returns the number of