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/* Optional code to distinguish library flavours.
Copyright (C) 2001-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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 */
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