/* Optional code to distinguish library flavours.

   Copyright (C) 2001-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _DL_LIBRECON_H

#define _DL_LIBRECON_H	1

static inline void __attribute__ ((unused, always_inline))

_dl_osversion_init (char *assume_kernel)

{

  unsigned long int i, j, osversion = 0;

  char *p = assume_kernel, *q;

  for (i = 0; i < 3; i++, p = q + 1)

    {

      j = _dl_strtoul (p, &q);

      if (j >= 255 || p == q || (i < 2 && *q && *q != '.'))

	{

	  osversion = 0;

	  break;

	}

      osversion |= j << (16 - 8 * i);

      if (!*q)

	break;

    }

  if (osversion)

    GLRO(dl_osversion) = osversion;

}

/* Recognizing extra environment variables.  */

#define EXTRA_LD_ENVVARS_13 \

    if (memcmp (envline, "ASSUME_KERNEL", 13) == 0)			      \

      {									      \

	_dl_osversion_init (&envline[14]);				      \

	break;								      \

      }

#define DL_OSVERSION_INIT \

  do {									      \

    char *assume_kernel = getenv ("LD_ASSUME_KERNEL");			      \

    if (assume_kernel)							      \

      _dl_osversion_init (assume_kernel);				      \

  } while (0)

#endif /* dl-librecon.h */