From d7284da858b38db4737f7e1f587c63390bee4328 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 25 May 2017 00:24:51 -0700
Subject: [PATCH] Port ATTRIBUTE_MAY_ALIAS to recent icc
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* src/conf_post.h (ATTRIBUTE_MAY_ALIAS) [__ICC]:
Define to empty.  Otherwise, icc (ICC) 17.0.4 20170411 says
“warning #2621: attribute "__may_alias__" does not apply here”
for constructs like ‘struct sockaddr *sa = (whatever);
struct sockaddr_in __attribute__ ((__may_alias__)) *sin
= (struct sockaddr_in *) sa;’.
---
 src/conf_post.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/conf_post.h b/src/conf_post.h
index c05c93b8190..5e1d8457deb 100644
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -263,7 +263,7 @@ extern int emacs_setenv_TZ (char const *);
 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 #define ATTRIBUTE_UNUSED _GL_UNUSED
 
-#if GNUC_PREREQ (3, 3, 0)
+#if GNUC_PREREQ (3, 3, 0) && !defined __ICC
 # define ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
 #else
 # define ATTRIBUTE_MAY_ALIAS
-- 
2.39.2