62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/* Optional code to distinguish library flavours.
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _DL_LIBRECON_H
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#define _DL_LIBRECON_H 1
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#define DISTINGUISH_LIB_VERSIONS \
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do \
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{ \
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/* We have to find out whether the binary is linked against \
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libc 5 or glibc. We do this by looking at all the DT_NEEDED \
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entries. If one is libc.so.5 this is a libc 5 linked binary. */ \
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if (_dl_loaded->l_info[DT_NEEDED]) \
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{ \
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/* We have dependencies. */ \
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const ElfW(Dyn) *d; \
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const char *strtab; \
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\
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strtab = (const char *) _dl_loaded->l_info[DT_STRTAB]->d_un.d_ptr; \
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\
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for (d = _dl_loaded->l_ld; d->d_tag != DT_NULL; ++d) \
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if (d->d_tag == DT_NEEDED \
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&& strcmp (strtab + d->d_un.d_val, "libc.so.5") == 0) \
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break; \
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\
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/* We print a `5' or `6' depending on the outcome. */ \
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_dl_sysdep_message (d->d_tag != DT_NULL ? "5\n" : "6\n", NULL); \
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} \
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} \
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while (0)
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/* Recognizing extra environment variables. */
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#define EXTRA_LD_ENVVARS \
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case 15: \
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if (memcmp (&envline[3], "LIBRARY_VERSION", 15) == 0) \
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{ \
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_dl_correct_cache_id = envline[19] == '5' ? 2 : 3; \
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break; \
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}
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/* Extra unsecure variables. */
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#define EXTRA_UNSECURE_ENVVARS "LD_AOUT_LIBRARY_PATH", "LD_AOUT_PRELOAD"
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#endif /* dl-librecon.h */
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