usr/src/lib/libm/common/C/__xpg6.c

   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;