From b06dee43696b5057ee8e1b9700655ad9e7d89669 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Fri, 22 Mar 2013 18:32:37 -0700
Subject: Add gzvprintf() as an undocumented function in zlib.

The function is only available if stdarg.h is available.
---
 zconf.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'zconf.h')

diff --git a/zconf.h b/zconf.h
index 76aba96..95c9ef6 100644
--- a/zconf.h
+++ b/zconf.h
@@ -427,6 +427,12 @@ typedef uLong FAR uLongf;
 #  endif
 #endif
 
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)
+#  ifndef Z_SOLO
+#    include <stdarg.h>         /* for va_list */
+#  endif
+#endif
+
 #ifdef _WIN32
 #  ifndef Z_SOLO
 #    include <stddef.h>         /* for wchar_t */
-- 
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