* configure.ac (DEBUGDIR_RELOCATABLE): Define for debugdir inside

exec_prefix.
	(TARGET_SYSTEM_ROOT_RELOCATABLE): Allow for exec_prefix being
	'${prefix}'.
	* configure, config.in: Regenerate.
	* defs.h (debug_file_directory): Declare.
	* main.c (captured_main): Canonicalize gdb_sysroot.  Assume
	TARGET_SYSTEM_ROOT is defined.  Initialize debug_file_directory and
	relocate it if DEBUGDIR_RELOCATABLE.
	* symfile.c (debug_file_directory): Make non-static.
	(find_separate_debug_file): Look for debug info for SYSROOT/PATH
	in DEBUGDIR/PATH if DEBUGDIR is inside SYSROOT.
	(_initialize_symfile): Don't initialize debug_file_directory here.

gdb/ChangeLog

@@ -1,3 +1,19 @@
+2007-01-09  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* configure.ac (DEBUGDIR_RELOCATABLE): Define for debugdir inside
+	exec_prefix.
+	(TARGET_SYSTEM_ROOT_RELOCATABLE): Allow for exec_prefix being
+	'${prefix}'.
+	* configure, config.in: Regenerate.
+	* defs.h (debug_file_directory): Declare.
+	* main.c (captured_main): Canonicalize gdb_sysroot.  Assume
+	TARGET_SYSTEM_ROOT is defined.  Initialize debug_file_directory and
+	relocate it if DEBUGDIR_RELOCATABLE.
+	* symfile.c (debug_file_directory): Make non-static.
+	(find_separate_debug_file): Look for debug info for SYSROOT/PATH
+	in DEBUGDIR/PATH if DEBUGDIR is inside SYSROOT.
+	(_initialize_symfile): Don't initialize debug_file_directory here.
+
 2007-01-09  Jim Blandy  <jimb@codesourcery.com>
 
 	* score-tdep.c (score_push_dummy_call): Don't mix declarations and

gdb/config.in

@@ -14,6 +14,9 @@
 /* Global directory for separate debug files. */
 #undef DEBUGDIR
 
+/* Define if the debug directory should be relocated when GDB is moved. */
+#undef DEBUGDIR_RELOCATABLE
+
 /* Define to BFD's default architecture. */
 #undef DEFAULT_BFD_ARCH
 

gdb/configure

@@ -3053,6 +3053,26 @@ _ACEOF
 
 #AC_DEFINE_UNQUOTED(DEBUGDIR, "$debugdir"),
 
+if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
+  if test "x$prefix" = xNONE; then
+    test_prefix=/usr/local
+  else
+    test_prefix=$prefix
+  fi
+else
+  test_prefix=$exec_prefix
+fi
+case ${debugdir} in
+"${test_prefix}"|"${test_prefix}/"*|\
+'${exec_prefix}'|'${exec_prefix}/'*)
+
+cat >>confdefs.h <<\_ACEOF
+#define DEBUGDIR_RELOCATABLE 1
+_ACEOF
+
+  ;;
+esac
+
 
 
 subdirs="$subdirs doc testsuite"
@@ -21172,7 +21192,7 @@ if test "${with_sysroot+set}" = set; then
 
  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 
- if test "x$exec_prefix" = xNONE; then
+ if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
   if test "x$prefix" = xNONE; then
    test_prefix=/usr/local
   else

gdb/configure.ac

@@ -75,6 +75,22 @@ AC_DEFINE_DIR(DEBUGDIR, debugdir,
               [Global directory for separate debug files. ])
 #AC_DEFINE_UNQUOTED(DEBUGDIR, "$debugdir"),
 
+if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
+  if test "x$prefix" = xNONE; then
+    test_prefix=/usr/local
+  else
+    test_prefix=$prefix
+  fi
+else
+  test_prefix=$exec_prefix
+fi
+case ${debugdir} in
+"${test_prefix}"|"${test_prefix}/"*|\
+'${exec_prefix}'|'${exec_prefix}/'*)
+  AC_DEFINE(DEBUGDIR_RELOCATABLE, 1, [Define if the debug directory should be relocated when GDB is moved.])
+  ;;
+esac
+
 AC_CONFIG_SUBDIRS(doc testsuite)
 
 # Provide defaults for some variables set by the per-host and per-target
@@ -1102,7 +1118,7 @@ AC_ARG_WITH(sysroot,
 
  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 
- if test "x$exec_prefix" = xNONE; then
+ if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
   if test "x$prefix" = xNONE; then
    test_prefix=/usr/local
   else

gdb/defs.h

@@ -167,6 +167,9 @@ extern int dbx_commands;
 /* System root path, used to find libraries etc.  */
 extern char *gdb_sysroot;
 
+/* Search path for separate debug files.  */
+extern char *debug_file_directory;
+
 extern int quit_flag;
 extern int immediate_quit;
 extern int sevenbit_strings;

gdb/main.c

@@ -221,19 +221,60 @@ captured_main (void *data)
       if (res == 0)
 	{
 	  xfree (gdb_sysroot);
-	  gdb_sysroot = TARGET_SYSTEM_ROOT;
+	  gdb_sysroot = xstrdup (TARGET_SYSTEM_ROOT);
 	}
     }
   else
-    gdb_sysroot = TARGET_SYSTEM_ROOT;
+    gdb_sysroot = xstrdup (TARGET_SYSTEM_ROOT);
 #else
-#if defined (TARGET_SYSTEM_ROOT)
+  gdb_sysroot = xstrdup (TARGET_SYSTEM_ROOT);
-  gdb_sysroot = TARGET_SYSTEM_ROOT;
+#endif
+
+  /* Canonicalize the sysroot path.  */
+  if (*gdb_sysroot)
+    {
+      char *canon_sysroot = lrealpath (gdb_sysroot);
+      if (canon_sysroot)
+	{
+	  xfree (gdb_sysroot);
+	  gdb_sysroot = canon_sysroot;
+	}
+    }
+
+#ifdef DEBUGDIR_RELOCATABLE
+  debug_file_directory = make_relative_prefix (argv[0], BINDIR, DEBUGDIR);
+  if (debug_file_directory)
+    {
+      struct stat s;
+      int res = 0;
+
+      if (stat (debug_file_directory, &s) == 0)
+	if (S_ISDIR (s.st_mode))
+	  res = 1;
+
+      if (res == 0)
+	{
+	  xfree (debug_file_directory);
+	  debug_file_directory = xstrdup (DEBUGDIR);
+	}
+    }
+  else
+    debug_file_directory = xstrdup (DEBUGDIR);
 #else
-  gdb_sysroot = "";
+  debug_file_directory = xstrdup (DEBUGDIR);
-#endif
 #endif
 
+  /* Canonicalize the debugfile path.  */
+  if (*debug_file_directory)
+    {
+      char *canon_debug = lrealpath (debug_file_directory);
+      if (canon_debug)
+	{
+	  xfree (debug_file_directory);
+	  debug_file_directory = canon_debug;
+	}
+    }
+
   /* There will always be an interpreter.  Either the one passed into
      this captured main, or one specified by the user at start up, or
      the console.  Initialize the interpreter to the one requested by 

gdb/symfile.c

@@ -1156,7 +1156,7 @@ separate_debug_file_exists (const char *name, unsigned long crc)
   return crc == file_crc;
 }
 
-static char *debug_file_directory = NULL;
+char *debug_file_directory = NULL;
 static void
 show_debug_file_directory (struct ui_file *file, int from_tty,
 			   struct cmd_list_element *c, const char *value)
@@ -1178,6 +1178,7 @@ find_separate_debug_file (struct objfile *objfile)
   char *dir;
   char *debugfile;
   char *name_copy;
+  char *canon_name;
   bfd_size_type debuglink_size;
   unsigned long crc32;
   int i;
@@ -1245,6 +1246,30 @@ find_separate_debug_file (struct objfile *objfile)
       return xstrdup (debugfile);
     }
 
+  /* If the file is in the sysroot, try using its base path in the
+     global debugfile directory.  */
+  canon_name = lrealpath (dir);
+  if (canon_name
+      && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0
+      && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)]))
+    {
+      strcpy (debugfile, debug_file_directory);
+      strcat (debugfile, canon_name + strlen (gdb_sysroot));
+      strcat (debugfile, "/");
+      strcat (debugfile, basename);
+
+      if (separate_debug_file_exists (debugfile, crc32))
+	{
+	  xfree (canon_name);
+	  xfree (basename);
+	  xfree (dir);
+	  return xstrdup (debugfile);
+	}
+    }
+  
+  if (canon_name)
+    xfree (canon_name);
+
   xfree (basename);
   xfree (dir);
   return NULL;
@@ -3857,7 +3882,6 @@ Usage: set extension-language .foo bar"),
   add_info ("extensions", info_ext_lang_command,
 	    _("All filename extensions associated with a source language."));
 
-  debug_file_directory = xstrdup (DEBUGDIR);
   add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
 				     &debug_file_directory, _("\
 Set the directory where separate debug symbols are searched for."), _("\