[src/trunk]: src/usr.bin/genassym Use __builtin_offsetof if __GNUC__ >= 4

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d5408afd9e69
branches:  trunk
changeset: 766958:d5408afd9e69
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Jul 05 05:19:02 2011 +0000

description:
Use __builtin_offsetof if __GNUC__ >= 4

diffstat:

 usr.bin/genassym/genassym.sh |  6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r dd27e303c3d9 -r d5408afd9e69 usr.bin/genassym/genassym.sh
--- a/usr.bin/genassym/genassym.sh      Tue Jul 05 04:33:23 2011 +0000
+++ b/usr.bin/genassym/genassym.sh      Tue Jul 05 05:19:02 2011 +0000
@@ -1,5 +1,5 @@
 #!/bin/sh -
-#      $NetBSD: genassym.sh,v 1.6 2009/11/28 20:30:01 dsl Exp $
+#      $NetBSD: genassym.sh,v 1.7 2011/07/05 05:19:02 matt Exp $
 #
 # Copyright (c) 1997 Matthias Pfaller.
 # All rights reserved.
@@ -79,7 +79,11 @@
 
 $AWK '
 BEGIN {
+       printf("#if __GNUC__ >= 4\n");
+       printf("#define offsetof(type, member) __builtin_offsetof(type, member)\n");
+       printf("#else\n");
        printf("#define offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
+       printf("#endif\n");
        defining = 0;
        type = "long";
        asmtype = "n";