xref: /illumos-gate/usr/src/lib/libm/common/C/__xpg6.c (revision fd6d41c5025e9fb45a115fc82d86e9983d1e9fd6)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  */
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29 
30 /*LINTLIBRARY*/
31 
32 /*
33  * See /ws/unix200x-gate/usr/src/lib/libc/port/gen/xpg6.c for libc default.
34  * __xpg6 (C99/SUSv3) is first included in Solaris 10 libc and libm
35  * as well as the K2 (S1S8) libsunmath and libmopt.
36  *
37  * The default setting, _C99SUSv3_mode_OFF, means to retain current Solaris
38  * behavior which is NOT C99/SUSv3 compliant.  This is normal.  These libraries
39  * determine which standard to use based on how applications are built.  These
40  * libraries at runtime determine which behavior to choose based on the value
41  * of __xpg6.  By default they retain their original Solaris behavior.
42  *
43  * __xpg6 is used to control certain behaviors between the C99 standard, the
44  * SUSv3 standard, and Solaris.  More explanation in lib/libc/inc/xpg6.h.
45  * The XPG6 C compiler utility (c99) will add an object file that contains
46  * an alternate definition for __xpg6.  The symbol interposition provided
47  * by the linker will allow these libraries to find that symbol instead.
48  *
49  * Possible settings are available and documented in lib/libc/inc/xpg6.h.
50  */
51 
52 #include "xpg6.h"
53 
54 unsigned int __xpg6 = _C99SUSv3_mode_OFF;
55