Update.

1998-03-29 20:59  Ulrich Drepper  <drepper@cygnus.com>

	* elf/Makefile: Fix typo.
	* elf/ldd.bash.in: Collect output of ldd --verify in verify_out.
	* elf/ldd.sh.in: Likewise.
	* elf/ldsodefs.h: Declare _dl_correct_cache_id.
	* elf/rtld.c (dl_main): In --verify mode allow platform specifc action.
	Use strsep correctly.
	(process_envvars): Allow platform specific variables.
	* sysdeps/generic/dl-cache.c (_dl_correct_cache_id): New variable.
	(_dl_load_cache_lookup): Test cache IDs found against
	_dl_correct_cache_id.
	* sysdeps/generic/dl-librecon.h: New file.
	* sysdeps/unix/sysv/linux/dl-librecon.h: New file.

	* sysdeps/unix/sysv/linux/lddlibc4.c: Include error.h.

	* sysdeps/unix/sysv/linux/ldd-rewrite.sed: New file.

5 files changed, 101 insertions, 2 deletions

diff --git a/sysdeps/generic/dl-cache.c b/sysdeps/generic/dl-cache.c
index 5aa1ea20f3..da7d2e49dd 100644
--- a/sysdeps/generic/dl-cache.c
+++ b/sysdeps/generic/dl-cache.c
@@ -44,6 +44,10 @@ struct cache_file
       } libs[0];
   };
 
+/* This is the cache ID we expect.  Normally it is 3 for glibc linked
+   binaries.  */
+int _dl_correct_cache_id = 3;
+
 /* Look up NAME in ld.so.cache and return the file name stored there,
    or null if none is found.  */
 
@@ -92,12 +96,12 @@ _dl_load_cache_lookup (const char *name)
 	! strcmp (name, ((const char *) &cache->libs[cache->nlibs] +
 			 cache->libs[i].key)))
       {
-	if ((best == NULL) || (cache->libs[i].flags == 3))
+	if ((best == NULL) || (cache->libs[i].flags == _dl_correct_cache_id))
 	  {
 	    best = ((const char *) &cache->libs[cache->nlibs]
 		    + cache->libs[i].value);
 
-	    if (cache->libs[i].flags == 3)
+	    if (cache->libs[i].flags == _dl_correct_cache_id)
 	      /* We've found an exact match for the shared object and no
 		 general `ELF' release.  Stop searching.  */
 	      break;
diff --git a/sysdeps/generic/dl-librecon.h b/sysdeps/generic/dl-librecon.h
new file mode 100644
index 0000000000..82bf7135f9
--- /dev/null
+++ b/sysdeps/generic/dl-librecon.h
@@ -0,0 +1,26 @@
+/* Optional code to distinguish library flavours.
+   Copyright (C) 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _DL_LIBRECON_H
+#define _DL_LIBRECON_H	1
+
+/* In the general case we don't do anything.  */
+
+#endif /* dl-librecon.h */
diff --git a/sysdeps/unix/sysv/linux/i386/dl-librecon.h b/sysdeps/unix/sysv/linux/i386/dl-librecon.h
new file mode 100644
index 0000000000..ef2c4bb632
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/dl-librecon.h
@@ -0,0 +1,57 @@
+/* Optional code to distinguish library flavours.
+   Copyright (C) 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _DL_LIBRECON_H
+#define _DL_LIBRECON_H	1
+
+#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 char *strtab = ((void *) main_map->l_addr		      \
+				+ main_map->l_info[DT_STRTAB]->d_un.d_ptr);   \
+	  const ElfW(Dyn) *d;						      \
+									      \
+	  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_sysdep_message (d->d_tag != DT_NULL ? "5\n" : "6\n", NULL);     \
+	}								      \
+    }									      \
+  while (0)
+
+/* Recognizing extra environment variables.  */
+#define EXTRA_LD_ENVVARS \
+  case 15:								      \
+    if (memcmp (&envline[3], "LIBRARY_VERSION", 15) == 0)		      \
+      {									      \
+	_dl_correct_cache_id = envline[19] == '5' ? 2 : 3;		      \
+	break;								      \
+      }
+
+#endif /* dl-librecon.h */
diff --git a/sysdeps/unix/sysv/linux/ldd-rewrite.sed b/sysdeps/unix/sysv/linux/ldd-rewrite.sed
new file mode 100644
index 0000000000..efc1b57540
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ldd-rewrite.sed
@@ -0,0 +1,11 @@
+/Maybe extra code for non-ELF binaries/a\
+  file=$1\
+  # Run the ldd stub.\
+  lddlibc4 $file\
+  # Test the result.\
+  if test $? -lt 3; then\
+    exit 0;\
+  fi\
+  # In case of an error punt.
+/LD_TRACE_LOADED_OBJECTS=1/a\
+add_env="$add_env LD_LIBRARY_VERSION=\\$verify_out"
diff --git a/sysdeps/unix/sysv/linux/lddlibc4.c b/sysdeps/unix/sysv/linux/lddlibc4.c
index 9de3dc8738..7c00d05d43 100644
--- a/sysdeps/unix/sysv/linux/lddlibc4.c
+++ b/sysdeps/unix/sysv/linux/lddlibc4.c
@@ -23,6 +23,7 @@
 
 #include <a.out.h>
 #include <errno.h>
+#include <error.h>
 #include <libintl.h>
 #include <locale.h>
 #include <stdio.h>