From: Dmitry V. Levin <ldv@altlinux.org>
Date: Thu, 10 Nov 2016 10:29:46 +0000 (+0000)
Subject: Introduce ALIGNOF macro
X-Git-Tag: v4.15~149
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=98b944bb66dbdb093770f7f304f7fb72d3ce8be7;p=strace

Introduce ALIGNOF macro

* gcc_compat.h (ALIGNOF): New macro.
---

diff --git a/gcc_compat.h b/gcc_compat.h
index 9e6c233f..eb5242f7 100644
--- a/gcc_compat.h
+++ b/gcc_compat.h
@@ -80,6 +80,12 @@
 # define ATTRIBUTE_SENTINEL	/* empty */
 #endif
 
+#if GNUC_PREREQ(4, 1)
+# define ALIGNOF(t_)	__alignof__(t_)
+#else
+# define ALIGNOF(t_)	(sizeof(struct {char x_; t_ y_;}) - sizeof(t_))
+#endif
+
 #if GNUC_PREREQ(4, 3)
 # define ATTRIBUTE_ALLOC_SIZE(args)	__attribute__((__alloc_size__ args))
 #else