Avoid missing-extern warnings.

1 files changed, 4 insertions, 0 deletions

diff --git a/zutil.h b/zutil.h
index acc1907f..0f983f73 100644
--- a/zutil.h
+++ b/zutil.h
@@ -36,6 +36,10 @@
    define "local" for the non-static meaning of "static", for readability
    (compile with -Dlocal if your debugger can't find static symbols) */
 
+extern const char deflate_copyright[];
+extern const char inflate_copyright[];
+extern const char inflate9_copyright[];
+
 typedef unsigned char  uch;
 typedef uch FAR uchf;
 typedef unsigned short ush;