lib: zlib: include deflate into zlib build
Add a new config CONFIG_GZIP_ENABLED, if enabled, the uboot bin would
include zlib's deflate method which could be used for compressing.
Signed-off-by: Lei Wen <leiwen@marvell.com>
diff --git a/lib/zlib/zutil.h b/lib/zlib/zutil.h
index 114cb74..7e05c3b 100644
--- a/lib/zlib/zutil.h
+++ b/lib/zlib/zutil.h
@@ -83,6 +83,10 @@
/* The minimum and maximum match lengths */
/* functions */
+#ifdef CONFIG_GZIP_COMPRESSED
+#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
+# define OS_CODE 0x03 /* assume Unix */
+#endif
#include <linux/string.h>
#define zmemcpy memcpy