5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local

          --- old/usr/src/lib/libm/common/m9x/nan.c
          +++ new/usr/src/lib/libm/common/m9x/nan.c

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License (the "License").
   6    6   * You may not use this file except in compliance with the License.
   7    7   *
   8    8   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9    9   * or http://www.opensolaris.org/os/licensing.
  10   10   * See the License for the specific language governing permissions
  11   11   * and limitations under the License.
  12   12   *
  13   13   * When distributing Covered Code, include this CDDL HEADER in each
  14   14   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15   15   * If applicable, add the following below this CDDL HEADER, with the
  16   16   * fields enclosed by brackets "[]" replaced with your own identifying
  17   17   * information: Portions Copyright [yyyy] [name of copyright owner]
  18   18   *
  19   19   * CDDL HEADER END

  20   20   */
  21   21  
  22   22  /*
  23   23   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24   24   */
  25   25  /*
  26   26   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27   27   * Use is subject to license terms.
  28   28   */
  29   29  
  30      -#if defined(ELFOBJ)
  31   30  #pragma weak nan = __nan
  32      -#endif
  33   31  
  34   32  /*
  35   33   *  nan(c) returns a NaN.  This implementation ignores c.
  36   34   */
  37   35  
  38   36  #include "libm.h"
  39   37  #include <sys/isa_defs.h>
  40   38  
  41   39  #if defined(__sparc)
  42   40  

  43   41  static const union {
  44   42          unsigned i[2];
  45   43          double d;
  46   44  } __nan_union = { 0x7fffffff, 0xffffffff };
  47   45  
  48   46  #elif defined(__i386) || defined(__amd64)
  49   47  
  50   48  static const union {
  51   49          unsigned i[2];
  52   50          double d;
  53   51  } __nan_union = { 0xffffffff, 0x7fffffff };
  54   52  
  55   53  #else
  56   54  #error Unknown architecture
  57   55  #endif
  58   56  
  59   57  /* ARGSUSED0 */
  60   58  double
  61   59  __nan(const char *c) {
  62   60          return (__nan_union.d);
  63   61  }

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