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/* Optional code to distinguish library flavours.
Copyright (C) 1998-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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
#include <sysdeps/unix/sysv/linux/dl-librecon.h>
#define DISTINGUISH_LIB_VERSIONS \
do \
{ \
/* We have to find out whether the binary is linked against \
libc 5 or glibc. We do this by looking at all the DT_NEEDED \
entries. If one is libc.so.5 this is a libc 5 linked binary. */ \
if (main_map->l_info[DT_NEEDED]) \
{ \
/* We have dependencies. */ \
const ElfW(Dyn) *d; \
const char *strtab; \
\
strtab = (const char *) D_PTR (main_map, l_info[DT_STRTAB]); \
\
for (d = main_map->l_ld; d->d_tag != DT_NULL; ++d) \
if (d->d_tag == DT_NEEDED \
&& strcmp (strtab + d->d_un.d_val, "libc.so.5") == 0) \
break; \
\
/* We print a `5' or `6' depending on the outcome. */ \
_dl_printf (d->d_tag != DT_NULL ? "5\n" : "6\n"); \
} \
} \
while (0)
/* Recognizing extra environment variables. */
#define EXTRA_LD_ENVVARS \
case 15: \
if (memcmp (envline, "LIBRARY_VERSION", 15) == 0) \
GLRO(dl_correct_cache_id) = envline[16] == '5' ? 2 : 3; \
break; \
/* Extra unsecure variables. The names are all stuffed in a single
string which means they have to be terminated with a '\0' explicitly. */
#define EXTRA_UNSECURE_ENVVARS \
"LD_AOUT_LIBRARY_PATH\0" \
"LD_AOUT_PRELOAD\0"
#endif /* dl-librecon.h */
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