Update.

1998-03-11  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/generic/dl-cache.c (_dl_load_cache_lookup): Use
	_dl_debug_message.

1998-03-12  Matthias Urlichs  <smurf@noris.de>

	* elf/dl-misc.c: Default for debug output should be stderr.
	* elf/dl-misc.c: Spurious garbage bytes after the PID in debug output.
	* elf/dl-lookup.c: reference_name may be NULL or empty.

1998-03-11 10:30  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* aclocal.m4 (LIBC_PROG_FOO_GNU): Fix order of redirection.

1998-03-11  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Dist: Add scsi/scsi.h.

	* sysdeps/unix/sysv/linux/scsi/sg.h: Include features.h.

1998-03-10  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/scsi/scsi.h: New file.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Install it.

1998-03-11 10:30  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

2 files changed, 36 insertions, 15 deletions

diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index f2cd981883..b994ef711b 100644
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -229,15 +229,20 @@ _dl_lookup_symbol (const char *undef_name, const ElfW(Sym) **ref,
     {
       if (*ref == NULL || ELFW(ST_BIND) ((*ref)->st_info) != STB_WEAK)
 	/* We could find no value for a strong reference.  */
-	_dl_signal_error (0, reference_name,
+	_dl_signal_error (0, (reference_name  && reference_name[0]
+			      ? reference_name
+			      : (_dl_argv[0] ?: "<main program>")),
 			  make_string (undefined_msg, undef_name));
       *ref = NULL;
       return 0;
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message (1, "binding file ", reference_name, " to ",
-		       current_value.m->l_name[0]
+    _dl_debug_message (1, "binding file ",
+		       (reference_name && reference_name[0]
+			? reference_name
+			: (_dl_argv[0] ?: "<main program>")),
+		       " to ", current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "'\n", NULL);
 
@@ -281,10 +286,13 @@ _dl_lookup_symbol_skip (const char *undef_name, const ElfW(Sym) **ref,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message (1, "binding file ", reference_name, " to ",
-		       current_value.m->l_name[0]
+    _dl_debug_message (1, "binding file ",
+		       (reference_name && reference_name[0]
+			? reference_name
+			: (_dl_argv[0] ?: "<main program>")),
+		       " to ", current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
-		       ": symbol `", undef_name, "'\n", NULL);
+		       ": symbol `", undef_name, "' (skip)\n", NULL);
 
   *ref = current_value.s;
   return current_value.m->l_addr;
@@ -318,7 +326,7 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
       if (res < 0)
 	/* Oh, oh.  The file named in the relocation entry does not
 	   contain the needed symbol.  */
-	_dl_signal_error (0, (*reference_name
+	_dl_signal_error (0, (reference_name && reference_name[0]
 			      ? reference_name
 			      : (_dl_argv[0] ?: "<main program>")),
 			  make_string ("symbol ", undef_name, ", version ",
@@ -334,7 +342,9 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
     {
       if (*ref == NULL || ELFW(ST_BIND) ((*ref)->st_info) != STB_WEAK)
 	/* We could find no value for a strong reference.  */
-	_dl_signal_error (0, reference_name,
+	_dl_signal_error (0, (reference_name && reference_name[0]
+			      ? reference_name
+			      : (_dl_argv[0] ?: "<main program>")),
 			  make_string (undefined_msg, undef_name,
 				       ", version ", version->name ?: NULL));
       *ref = NULL;
@@ -342,8 +352,11 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message (1, "binding file ", reference_name, " to ",
-		       current_value.m->l_name[0]
+    _dl_debug_message (1, "binding file ",
+		       (reference_name && reference_name[0]
+			? reference_name
+			: (_dl_argv[0] ?: "<main program>")),
+		       " to ", current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "' [", version->name,
 		       "]\n", NULL);
@@ -389,18 +402,24 @@ _dl_lookup_versioned_symbol_skip (const char *undef_name,
 	  char buf[sizeof undefined_msg + len];
 	  __mempcpy (__mempcpy (buf, undefined_msg, sizeof undefined_msg - 1),
 		     undef_name, len + 1);
-	  _dl_signal_error (0, reference_name, buf);
+	  _dl_signal_error (0, (reference_namee && reference_name[0]
+				? reference_name
+				: (_dl_argv[0] ?: "<main program>")), buf);
 	}
       *ref = NULL;
       return 0;
     }
 
   if (_dl_debug_bindings)
-    _dl_debug_message (1, "binding file ", reference_name, " to ",
+    _dl_debug_message (1, "binding file ",
+		       (reference_name && reference_name[0]
+			? reference_name
+			: (_dl_argv[0] ?: "<main program>")),
+		       " to ",
 		       current_value.m->l_name[0]
 		       ? current_value.m->l_name : _dl_argv[0],
 		       ": symbol `", undef_name, "' [", version->name,
-		       "]\n", NULL);
+		       "] (skip)\n", NULL);
 
   *ref = current_value.s;
   return current_value.m->l_addr;
diff --git a/elf/dl-misc.c b/elf/dl-misc.c
index 1e13d0d28a..3d796360b3 100644
--- a/elf/dl-misc.c
+++ b/elf/dl-misc.c
@@ -77,7 +77,7 @@ _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot)
 
 
 /* Descriptor to write debug messages to.  */
-int _dl_debug_fd;
+int _dl_debug_fd = 2;
 
 
 void
@@ -122,7 +122,9 @@ _dl_debug_message (int new_line, const char *msg, ...)
 	if (new_line)
 	  {
 	    char buf[7] = "00000:\t";
-	    __write (_dl_debug_fd, _itoa_word (pid, &buf[5], 10, 0), 7);
+	    assert (pid >= 0 && pid < 100000);
+	    _itoa_word (pid, &buf[5], 10, 0);
+	    __write (_dl_debug_fd, buf, 7);
 	    new_line = 0;
 	  }