From ae760389ae4c3b7f71e2f205d43c4ba97eb54785 Mon Sep 17 00:00:00 2001
From: sezero <sezero@users.sourceforge.net>
Date: Sat, 4 Aug 2018 17:14:20 +0300
Subject: [PATCH] glide2x/h3 (linhwc.c/minihwc.c): fix fenceVar with newer gcc
 versions.

from glide3x tree.
---
 glide2x/h3/minihwc/linhwc.c  | 10 +++++++++-
 glide2x/h3/minihwc/minihwc.c | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/glide2x/h3/minihwc/linhwc.c b/glide2x/h3/minihwc/linhwc.c
index 8193999..75242c9 100644
--- a/glide2x/h3/minihwc/linhwc.c
+++ b/glide2x/h3/minihwc/linhwc.c
@@ -63,7 +63,15 @@ hwcCheckMemSize(hwcBoardInfo *bInfo, FxU32 xres, FxU32 yres, FxU32 nColBuffers,
 #include <X11/extensions/xf86dga.h>
 #include <X11/extensions/xf86vmode.h>
 
-static FxU32 fenceVar;
+#if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)))
+# define __attribute_used __attribute__((__used__))
+#elif defined(__GNUC__) && (__GNUC__ >= 2)
+# define __attribute_used __attribute__((__unused__))
+#else
+# define __attribute_used
+#endif
+
+static FxU32 __attribute_used fenceVar;
 #define P6FENCE asm("xchg %%eax, %0" : : "m" (fenceVar) : "eax");
 
 #define MAXFIFOSIZE     0x40000
diff --git a/glide2x/h3/minihwc/minihwc.c b/glide2x/h3/minihwc/minihwc.c
index 007b137..08cc06d 100644
--- a/glide2x/h3/minihwc/minihwc.c
+++ b/glide2x/h3/minihwc/minihwc.c
@@ -441,10 +441,18 @@
 
 #define MAXFIFOSIZE     0x40000
 
+#if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)))
+# define __attribute_used __attribute__((__used__))
+#elif defined(__GNUC__) && (__GNUC__ >= 2)
+# define __attribute_used __attribute__((__unused__))
+#else
+# define __attribute_used
+#endif
+
 static hwcInfo hInfo;
 static char errorString[1024];
 static int num_monitor = 0;
-static FxU32 fenceVar;
+static FxU32 __attribute_used fenceVar;
 
 
 #if defined(__WATCOMC__)