From 32835873f0bb34d440a07b2339fbb3e9f9e37faa Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Fri, 13 Dec 2019 08:19:39 +0100
Subject: [PATCH] Update m3d.h

Fix review warning.
---
 code/M3D/m3d.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/code/M3D/m3d.h b/code/M3D/m3d.h
index 25baacc24..5d78374f0 100644
--- a/code/M3D/m3d.h
+++ b/code/M3D/m3d.h
@@ -87,7 +87,11 @@ typedef uint16_t M3D_INDEX;
 #ifndef _MSC_VER
 #define _inline __inline__
 #define _pack __attribute__((packed))
-#define _unused __attribute__((unused))
+#  ifdef __cplusplus // only for c++ code
+#    define _unused __attribute__((unused))
+#  else // or c code just use void
+#    define _unused (void)
+#  endif
 #else
 #define _inline
 #define _pack