Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 15 May 2015 17:51:04 +0000 (UTC)
From:      "Pedro F. Giffuni" <pfg@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r282981 - head/sys/sys
Message-ID:  <201505151751.t4FHp4Kx079707@svn.freebsd.org>

next in thread | raw e-mail | index | archive | help
Author: pfg
Date: Fri May 15 17:51:03 2015
New Revision: 282981
URL: https://svnweb.freebsd.org/changeset/base/282981

Log:
  Replace a CONSTCOND for a void value as a replacement for __unreachable builtin
  
  This only applies if we are not using clang or gcc but it lets us use the
  __unreachable() buitin in expressions.
  
  Suggested by:	tijl

Modified:
  head/sys/sys/cdefs.h

Modified: head/sys/sys/cdefs.h
==============================================================================
--- head/sys/sys/cdefs.h	Fri May 15 15:56:28 2015	(r282980)
+++ head/sys/sys/cdefs.h	Fri May 15 17:51:03 2015	(r282981)
@@ -391,7 +391,7 @@
 #if __has_builtin(__builtin_unreachable) || __GNUC_PREREQ__(4, 6)
 #define	__unreachable()	__builtin_unreachable()
 #else
-#define	__unreachable()	do {} while (/*CONSTCOND*/0)
+#define	__unreachable()	((void)0)
 #endif
 
 #if __has_attribute(alloc_align) || __GNUC_PREREQ__(4, 9)



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201505151751.t4FHp4Kx079707>