From 021e887de99444492b992805fcaf4acd9e72a781 Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Sat, 14 Dec 2024 15:31:27 -0800
Subject: [PATCH] xcb.h: use __has_attribute to check for
 attribute((__packed__)) support

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/lib/libxcb/-/merge_requests/64>
---
 src/xcb.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/xcb.h b/src/xcb.h
index b4fb3fd..fd6b7b9 100644
--- a/src/xcb.h
+++ b/src/xcb.h
@@ -47,7 +47,11 @@ extern "C" {
  * @file xcb.h
  */
 
-#ifdef __GNUC__
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with older compilers. */
+#endif
+
+#if defined(__GNUC__) ||  __has_attribute(__packed__)
 #define XCB_PACKED __attribute__((__packed__))
 #else
 #define XCB_PACKED