gdb

2009-04-23  Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
	    Tom Tromey  <tromey@redhat.com>

	* configure, config.in: Regenerate.
	* configure.ac: Support for relocatable GDB datadir.  Use
	GDB_AC_WITH_DIR.  Always define TARGET_SYSTEM_ROOT_RELOCATABLE.
	* acinclude.m4 (GDB_AC_WITH_DIR): New defun.
	* top.c (init_main): Add "set data-directory".
	* defs.h (gdb_datadir): Declare.
	* main.c (gdb_datadir): New global.
	(captured_main): Initialize gdb_datadir.  Use relocate_directory.
	(relocate_path): New function.
	(relocate_directory): Likewise.
	(get_init_files): Use relocate_path.
	(README): Mention --with-gdb-datadir.
gdb/doc
2009-04-23  Tom Tromey  <tromey@redhat.com>

	* gdb.texinfo (Data Files): New node.
	(GDB Files): Update menu.

11 files changed, 299 insertions, 181 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ec17070..0bfe563 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,19 @@
+2009-04-23  Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
+	    Tom Tromey  <tromey@redhat.com>
+
+	* configure, config.in: Regenerate.
+	* configure.ac: Support for relocatable GDB datadir.  Use
+	GDB_AC_WITH_DIR.  Always define TARGET_SYSTEM_ROOT_RELOCATABLE.
+	* acinclude.m4 (GDB_AC_WITH_DIR): New defun.
+	* top.c (init_main): Add "set data-directory".
+	* defs.h (gdb_datadir): Declare.
+	* main.c (gdb_datadir): New global.
+	(captured_main): Initialize gdb_datadir.  Use relocate_directory.
+	(relocate_path): New function.
+	(relocate_directory): Likewise.
+	(get_init_files): Use relocate_path.
+	(README): Mention --with-gdb-datadir.
+
 2009-04-23  Joel Brobecker  <brobecker@adacore.com>
 
 	* ada-tasks (task_command_1): Call target_find_new_threads.
diff --git a/gdb/README b/gdb/README
index cc16ecd..868cbb5 100644
--- a/gdb/README
+++ b/gdb/README
@@ -436,6 +436,11 @@ prefer; but you may abbreviate option names if you use `--'.
      Same as `--host=HOST'.  If you omit this, GDB will guess; it's
      quite accurate.
 
+`--with-gdb-datadir=PATH'
+     Set the GDB-specific data directory.  GDB will look here for
+     certain supporting files or scripts.  This defaults to the `gdb'
+     subdirectory of `datadir' (which can be set using `--datadir').
+
 `configure' accepts other options, for compatibility with configuring
 other GNU tools recursively; but these are the only options that affect
 GDB or its supporting libraries.
diff --git a/gdb/acinclude.m4 b/gdb/acinclude.m4
index 932dd4f..d1f71c1 100644
--- a/gdb/acinclude.m4
+++ b/gdb/acinclude.m4
@@ -387,3 +387,38 @@ AC_DEFUN([CY_AC_TK_PRIVATE_HEADERS], [
     AC_MSG_RESULT(${private_dir})
   fi
 ])
+
+dnl GDB_AC_WITH_DIR([VARIABLE], [ARG-NAME], [HELP], [DEFAULT])
+dnl Add a new --with option that defines a directory.
+dnl The result is stored in VARIABLE.  AC_DEFINE_DIR is called
+dnl on this variable, as is AC_SUBST.
+dnl ARG-NAME is the base name of the argument (without "--with").
+dnl HELP is the help text to use.
+dnl If the user's choice is relative to the prefix, then the
+dnl result is relocatable, then this will define the C macro
+dnl VARIABLE_RELOCATABLE to 1; otherwise it is defined as 0.
+dnl DEFAULT is the default value, which is used if the user
+dnl does not specify the argument.
+AC_DEFUN([GDB_AC_WITH_DIR], [
+  AC_ARG_WITH([$2], AS_HELP_STRING([--with-][$2][=PATH], [$3]), [
+    [$1]=$withval], [[$1]=[$4]])
+  AC_DEFINE_DIR([$1], [$1], [$3])
+  AC_SUBST([$1])
+  if test "x$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
+  value=0
+  case ${ac_define_dir} in
+     "${test_prefix}"|"${test_prefix}/"*|\
+	'${exec_prefix}'|'${exec_prefix}/'*)
+     value=1
+     ;;
+  esac
+  AC_DEFINE_UNQUOTED([$1]_RELOCATABLE, $value, [Define if the $2 directory should be relocated when GDB is moved.])
+  ])
diff --git a/gdb/config.in b/gdb/config.in
index 1bfd837..d4d4469 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -26,10 +26,11 @@
 /* Define to 1 if using `alloca.c'. */
 #undef C_ALLOCA
 
-/* Global directory for separate debug files. */
+/* look for global separate debug info in this path [LIBDIR/debug] */
 #undef DEBUGDIR
 
-/* Define if the debug directory should be relocated when GDB is moved. */
+/* Define if the separate-debug-dir directory should be relocated when GDB is
+   moved. */
 #undef DEBUGDIR_RELOCATABLE
 
 /* Define to BFD's default architecture. */
@@ -42,6 +43,13 @@
    language is requested. */
 #undef ENABLE_NLS
 
+/* look for global separate data files in this path [DATADIR/gdb] */
+#undef GDB_DATADIR
+
+/* Define if the gdb-datadir directory should be relocated when GDB is moved.
+   */
+#undef GDB_DATADIR_RELOCATABLE
+
 /* Define to be a string naming the default host character set. */
 #undef GDB_DEFAULT_HOST_CHARSET
 
@@ -670,10 +678,10 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
-/* System-wide gdbinit file. */
+/* automatically load a system-wide gdbinit file */
 #undef SYSTEM_GDBINIT
 
-/* Define if the system-wide gdbinit file should be relocated when GDB is
+/* Define if the system-gdbinit directory should be relocated when GDB is
    moved. */
 #undef SYSTEM_GDBINIT_RELOCATABLE
 
diff --git a/gdb/configure b/gdb/configure
index d709727..4444ffa 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -314,7 +314,7 @@ ac_subdirs_all="$ac_subdirs_all doc testsuite"
 ac_subdirs_all="$ac_subdirs_all gdbtk"
 ac_subdirs_all="$ac_subdirs_all multi-ice"
 ac_subdirs_all="$ac_subdirs_all gdbserver"
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP RANLIB ac_ct_RANLIB build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os am__leading_dot DEPDIR CCDEPMODE MAKE GMAKE_TRUE GMAKE_FALSE SET_MAKE USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT localedir GL_COND_LIBTOOL_TRUE GL_COND_LIBTOOL_FALSE GNULIB_MEMMEM GNULIB_MEMPCPY GNULIB_MEMRCHR GNULIB_STPCPY GNULIB_STPNCPY GNULIB_STRCHRNUL GNULIB_STRDUP GNULIB_STRNDUP GNULIB_STRNLEN GNULIB_STRPBRK GNULIB_STRSEP GNULIB_STRSTR GNULIB_STRCASESTR GNULIB_STRTOK_R GNULIB_MBSLEN GNULIB_MBSNLEN GNULIB_MBSCHR GNULIB_MBSRCHR GNULIB_MBSSTR GNULIB_MBSCASECMP GNULIB_MBSNCASECMP GNULIB_MBSPCASECMP GNULIB_MBSCASESTR GNULIB_MBSCSPN GNULIB_MBSPBRK GNULIB_MBSSPN GNULIB_MBSSEP GNULIB_MBSTOK_R GNULIB_STRERROR GNULIB_STRSIGNAL HAVE_DECL_MEMMEM HAVE_MEMPCPY HAVE_DECL_MEMRCHR HAVE_STPCPY HAVE_STPNCPY HAVE_STRCHRNUL HAVE_DECL_STRDUP HAVE_STRNDUP HAVE_DECL_STRNDUP HAVE_DECL_STRNLEN HAVE_STRPBRK HAVE_STRSEP HAVE_STRCASESTR HAVE_DECL_STRTOK_R HAVE_DECL_STRERROR HAVE_DECL_STRSIGNAL REPLACE_STRERROR REPLACE_STRSIGNAL REPLACE_MEMMEM REPLACE_STRCASESTR REPLACE_STRSTR HAVE_LONG_LONG_INT HAVE_UNSIGNED_LONG_LONG_INT HAVE_INTTYPES_H HAVE_SYS_TYPES_H INCLUDE_NEXT NEXT_STDINT_H HAVE_STDINT_H HAVE_SYS_INTTYPES_H HAVE_SYS_BITYPES_H BITSIZEOF_PTRDIFF_T BITSIZEOF_SIG_ATOMIC_T BITSIZEOF_SIZE_T BITSIZEOF_WCHAR_T BITSIZEOF_WINT_T HAVE_SIGNED_SIG_ATOMIC_T HAVE_SIGNED_WCHAR_T HAVE_SIGNED_WINT_T PTRDIFF_T_SUFFIX SIG_ATOMIC_T_SUFFIX SIZE_T_SUFFIX WCHAR_T_SUFFIX WINT_T_SUFFIX STDINT_H NEXT_STRING_H GNULIB_WCWIDTH HAVE_DECL_WCWIDTH REPLACE_WCWIDTH WCHAR_H HAVE_WCHAR_H NEXT_WCHAR_H LIBGNU_LIBDEPS LIBGNU_LTLIBDEPS GNULIB_STDINT_H PACKAGE INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK AMTAR am__tar am__untar am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH am__fastdepCC_TRUE am__fastdepCC_FALSE subdirs TARGET_OBS PKGVERSION REPORT_BUGS_TO REPORT_BUGS_TEXI LN_S YACC AR ac_ct_AR DLLTOOL ac_ct_DLLTOOL WINDRES ac_ct_WINDRES MIG ac_ct_MIG READLINE READLINE_DEPS READLINE_CFLAGS HAVE_LIBEXPAT LIBEXPAT LTLIBEXPAT PYTHON_CFLAGS ALLOCA CONFIG_LDFLAGS TARGET_SYSTEM_ROOT TARGET_SYSTEM_ROOT_DEFINE WARN_CFLAGS WERROR_CFLAGS SER_HARDWIRE WIN32LIBS LIBGUI GUI_CFLAGS_X WIN32LDAPP TCL_VERSION TCL_PATCH_LEVEL TCL_BIN_DIR TCL_SRC_DIR TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC TCL_INCLUDE TCL_LIBRARY TCL_DEPS TK_VERSION TK_BIN_DIR TK_SRC_DIR TK_LIB_FILE TK_LIB_FLAG TK_LIB_SPEC TK_STUB_LIB_FILE TK_STUB_LIB_FLAG TK_STUB_LIB_SPEC TK_INCLUDE TK_LIBRARY TK_DEPS TK_XINCLUDES X_CFLAGS X_LDFLAGS X_LIBS GDBTKLIBS GDBTK_CFLAGS GDBTK_SRC_DIR SIM SIM_OBS ENABLE_CFLAGS PROFILE_CFLAGS CONFIG_OBS CONFIG_DEPS CONFIG_SRCS CONFIG_ALL CONFIG_CLEAN CONFIG_INSTALL CONFIG_UNINSTALL target_subdir frags GDB_NM_FILE datarootdir docdir htmldir pdfdir LIBOBJS LTLIBOBJS gl_LIBOBJS gl_LTLIBOBJS gltests_LIBOBJS gltests_LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP RANLIB ac_ct_RANLIB build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os am__leading_dot DEPDIR CCDEPMODE MAKE GMAKE_TRUE GMAKE_FALSE SET_MAKE USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT localedir GL_COND_LIBTOOL_TRUE GL_COND_LIBTOOL_FALSE GNULIB_MEMMEM GNULIB_MEMPCPY GNULIB_MEMRCHR GNULIB_STPCPY GNULIB_STPNCPY GNULIB_STRCHRNUL GNULIB_STRDUP GNULIB_STRNDUP GNULIB_STRNLEN GNULIB_STRPBRK GNULIB_STRSEP GNULIB_STRSTR GNULIB_STRCASESTR GNULIB_STRTOK_R GNULIB_MBSLEN GNULIB_MBSNLEN GNULIB_MBSCHR GNULIB_MBSRCHR GNULIB_MBSSTR GNULIB_MBSCASECMP GNULIB_MBSNCASECMP GNULIB_MBSPCASECMP GNULIB_MBSCASESTR GNULIB_MBSCSPN GNULIB_MBSPBRK GNULIB_MBSSPN GNULIB_MBSSEP GNULIB_MBSTOK_R GNULIB_STRERROR GNULIB_STRSIGNAL HAVE_DECL_MEMMEM HAVE_MEMPCPY HAVE_DECL_MEMRCHR HAVE_STPCPY HAVE_STPNCPY HAVE_STRCHRNUL HAVE_DECL_STRDUP HAVE_STRNDUP HAVE_DECL_STRNDUP HAVE_DECL_STRNLEN HAVE_STRPBRK HAVE_STRSEP HAVE_STRCASESTR HAVE_DECL_STRTOK_R HAVE_DECL_STRERROR HAVE_DECL_STRSIGNAL REPLACE_STRERROR REPLACE_STRSIGNAL REPLACE_MEMMEM REPLACE_STRCASESTR REPLACE_STRSTR HAVE_LONG_LONG_INT HAVE_UNSIGNED_LONG_LONG_INT HAVE_INTTYPES_H HAVE_SYS_TYPES_H INCLUDE_NEXT NEXT_STDINT_H HAVE_STDINT_H HAVE_SYS_INTTYPES_H HAVE_SYS_BITYPES_H BITSIZEOF_PTRDIFF_T BITSIZEOF_SIG_ATOMIC_T BITSIZEOF_SIZE_T BITSIZEOF_WCHAR_T BITSIZEOF_WINT_T HAVE_SIGNED_SIG_ATOMIC_T HAVE_SIGNED_WCHAR_T HAVE_SIGNED_WINT_T PTRDIFF_T_SUFFIX SIG_ATOMIC_T_SUFFIX SIZE_T_SUFFIX WCHAR_T_SUFFIX WINT_T_SUFFIX STDINT_H NEXT_STRING_H GNULIB_WCWIDTH HAVE_DECL_WCWIDTH REPLACE_WCWIDTH WCHAR_H HAVE_WCHAR_H NEXT_WCHAR_H LIBGNU_LIBDEPS LIBGNU_LTLIBDEPS GNULIB_STDINT_H PACKAGE INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK AMTAR am__tar am__untar am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH am__fastdepCC_TRUE am__fastdepCC_FALSE DEBUGDIR GDB_DATADIR subdirs TARGET_OBS PKGVERSION REPORT_BUGS_TO REPORT_BUGS_TEXI LN_S YACC AR ac_ct_AR DLLTOOL ac_ct_DLLTOOL WINDRES ac_ct_WINDRES MIG ac_ct_MIG READLINE READLINE_DEPS READLINE_CFLAGS HAVE_LIBEXPAT LIBEXPAT LTLIBEXPAT PYTHON_CFLAGS ALLOCA CONFIG_LDFLAGS TARGET_SYSTEM_ROOT TARGET_SYSTEM_ROOT_DEFINE SYSTEM_GDBINIT WARN_CFLAGS WERROR_CFLAGS SER_HARDWIRE WIN32LIBS LIBGUI GUI_CFLAGS_X WIN32LDAPP TCL_VERSION TCL_PATCH_LEVEL TCL_BIN_DIR TCL_SRC_DIR TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC TCL_INCLUDE TCL_LIBRARY TCL_DEPS TK_VERSION TK_BIN_DIR TK_SRC_DIR TK_LIB_FILE TK_LIB_FLAG TK_LIB_SPEC TK_STUB_LIB_FILE TK_STUB_LIB_FLAG TK_STUB_LIB_SPEC TK_INCLUDE TK_LIBRARY TK_DEPS TK_XINCLUDES X_CFLAGS X_LDFLAGS X_LIBS GDBTKLIBS GDBTK_CFLAGS GDBTK_SRC_DIR SIM SIM_OBS ENABLE_CFLAGS PROFILE_CFLAGS CONFIG_OBS CONFIG_DEPS CONFIG_SRCS CONFIG_ALL CONFIG_CLEAN CONFIG_INSTALL CONFIG_UNINSTALL target_subdir frags GDB_NM_FILE datarootdir docdir htmldir pdfdir LIBOBJS LTLIBOBJS gl_LIBOBJS gl_LTLIBOBJS gltests_LIBOBJS gltests_LTLIBOBJS'
 ac_subst_files='host_makefile_frag'
 ac_pwd=`pwd`
 
@@ -887,6 +887,8 @@ Optional Packages:
   --with-separate-debug-dir=PATH
                           look for global separate debug info in this path
                           [LIBDIR/debug]
+  --with-gdb-datadir=PATH look for global separate data files in this path
+                          [DATADIR/gdb]
   --with-relocated-sources=PATH
                           automatically relocate this path for source files
   --with-libunwind        use libunwind frame unwinding support
@@ -908,7 +910,7 @@ Optional Packages:
                           with caution on other system)
   --with-sysroot[=DIR]
                           search for usr/lib et al within DIR
-  --with-system-gdbinit=FILE
+  --with-system-gdbinit=PATH
                           automatically load a system-wide gdbinit file
   --with-tcl              directory containing tcl configuration (tclConfig.sh)
   --with-tk               directory containing tk configuration (tkConfig.sh)
@@ -7105,19 +7107,20 @@ fi
 
 
 
-debugdir=${libdir}/debug
 
 
 # Check whether --with-separate-debug-dir or --without-separate-debug-dir was given.
 if test "${with_separate_debug_dir+set}" = set; then
   withval="$with_separate_debug_dir"
-  debugdir="${withval}"
-fi;
 
+    DEBUGDIR=$withval
+else
+  DEBUGDIR=${libdir}/debug
+fi;
 
   test "x$prefix" = xNONE && prefix="$ac_default_prefix"
   test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
-  ac_define_dir=`eval echo $debugdir`
+  ac_define_dir=`eval echo $DEBUGDIR`
   ac_define_dir=`eval echo $ac_define_dir`
 
 cat >>confdefs.h <<_ACEOF
@@ -7125,27 +7128,76 @@ cat >>confdefs.h <<_ACEOF
 _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
+  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=$prefix
+     fi
   else
-    test_prefix=$prefix
+     test_prefix=$exec_prefix
   fi
+  value=0
+  case ${ac_define_dir} in
+     "${test_prefix}"|"${test_prefix}/"*|\
+	'${exec_prefix}'|'${exec_prefix}/'*)
+     value=1
+     ;;
+  esac
+
+cat >>confdefs.h <<_ACEOF
+#define DEBUGDIR_RELOCATABLE $value
+_ACEOF
+
+
+
+# GDB's datadir relocation
+
+
+
+# Check whether --with-gdb-datadir or --without-gdb-datadir was given.
+if test "${with_gdb_datadir+set}" = set; then
+  withval="$with_gdb_datadir"
+
+    GDB_DATADIR=$withval
 else
-  test_prefix=$exec_prefix
-fi
-case ${debugdir} in
-"${test_prefix}"|"${test_prefix}/"*|\
-'${exec_prefix}'|'${exec_prefix}/'*)
+  GDB_DATADIR=${datadir}/gdb
+fi;
 
-cat >>confdefs.h <<\_ACEOF
-#define DEBUGDIR_RELOCATABLE 1
+  test "x$prefix" = xNONE && prefix="$ac_default_prefix"
+  test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+  ac_define_dir=`eval echo $GDB_DATADIR`
+  ac_define_dir=`eval echo $ac_define_dir`
+
+cat >>confdefs.h <<_ACEOF
+#define GDB_DATADIR "$ac_define_dir"
 _ACEOF
 
-  ;;
-esac
+
+
+  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
+  value=0
+  case ${ac_define_dir} in
+     "${test_prefix}"|"${test_prefix}/"*|\
+	'${exec_prefix}'|'${exec_prefix}/'*)
+     value=1
+     ;;
+  esac
+
+cat >>confdefs.h <<_ACEOF
+#define GDB_DATADIR_RELOCATABLE $value
+_ACEOF
+
+
 
 
 # Check whether --with-relocated-sources or --without-relocated-sources was given.
@@ -19896,6 +19948,7 @@ _ACEOF
 fi
 
 
+target_sysroot_reloc=0
 
 # Check whether --with-sysroot or --without-sysroot was given.
 if test "${with_sysroot+set}" = set; then
@@ -19923,8 +19976,7 @@ if test "${with_sysroot+set}" = set; then
  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
  '${prefix}'|'${prefix}/'*|\
  '${exec_prefix}'|'${exec_prefix}/'*)
-   t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
-   TARGET_SYSTEM_ROOT_DEFINE="$t"
+   target_sysroot_reloc=1
    ;;
  esac
 
@@ -19934,21 +19986,24 @@ else
  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
 
 fi;
+TARGET_SYSTEM_ROOT_DEFINE="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE=$target_sysroot_reloc"
+
 
 
 
-system_gdbinit=
 
 # Check whether --with-system-gdbinit or --without-system-gdbinit was given.
 if test "${with_system_gdbinit+set}" = set; then
   withval="$with_system_gdbinit"
-  system_gdbinit=${withval}
-fi;
 
+    SYSTEM_GDBINIT=$withval
+else
+  SYSTEM_GDBINIT=
+fi;
 
   test "x$prefix" = xNONE && prefix="$ac_default_prefix"
   test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
-  ac_define_dir=`eval echo $system_gdbinit`
+  ac_define_dir=`eval echo $SYSTEM_GDBINIT`
   ac_define_dir=`eval echo $ac_define_dir`
 
 cat >>confdefs.h <<_ACEOF
@@ -19957,28 +20012,28 @@ _ACEOF
 
 
 
-if test "x$prefix" = xNONE; then
-  test_prefix=$ac_default_prefix
-else
-  test_prefix=$prefix
-fi
-if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
-  test_exec_prefix=$test_prefix
-else
-  test_exec_prefix=$exec_prefix
-fi
-case ${system_gdbinit} in
- "${test_prefix}"|"${test_prefix}/"*|\
- "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
- '${prefix}'|'${prefix}/'*|\
- '${exec_prefix}'|'${exec_prefix}/'*)
+  if test "x$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
+  value=0
+  case ${ac_define_dir} in
+     "${test_prefix}"|"${test_prefix}/"*|\
+	'${exec_prefix}'|'${exec_prefix}/'*)
+     value=1
+     ;;
+  esac
 
-cat >>confdefs.h <<\_ACEOF
-#define SYSTEM_GDBINIT_RELOCATABLE 1
+cat >>confdefs.h <<_ACEOF
+#define SYSTEM_GDBINIT_RELOCATABLE $value
 _ACEOF
 
-   ;;
-esac
+
 
 # Check whether --enable-werror or --disable-werror was given.
 if test "${enable_werror+set}" = set; then
@@ -22112,6 +22167,8 @@ s,@AMDEP_FALSE@,$AMDEP_FALSE,;t t
 s,@AMDEPBACKSLASH@,$AMDEPBACKSLASH,;t t
 s,@am__fastdepCC_TRUE@,$am__fastdepCC_TRUE,;t t
 s,@am__fastdepCC_FALSE@,$am__fastdepCC_FALSE,;t t
+s,@DEBUGDIR@,$DEBUGDIR,;t t
+s,@GDB_DATADIR@,$GDB_DATADIR,;t t
 s,@subdirs@,$subdirs,;t t
 s,@TARGET_OBS@,$TARGET_OBS,;t t
 s,@PKGVERSION@,$PKGVERSION,;t t
@@ -22138,6 +22195,7 @@ s,@ALLOCA@,$ALLOCA,;t t
 s,@CONFIG_LDFLAGS@,$CONFIG_LDFLAGS,;t t
 s,@TARGET_SYSTEM_ROOT@,$TARGET_SYSTEM_ROOT,;t t
 s,@TARGET_SYSTEM_ROOT_DEFINE@,$TARGET_SYSTEM_ROOT_DEFINE,;t t
+s,@SYSTEM_GDBINIT@,$SYSTEM_GDBINIT,;t t
 s,@WARN_CFLAGS@,$WARN_CFLAGS,;t t
 s,@WERROR_CFLAGS@,$WERROR_CFLAGS,;t t
 s,@SER_HARDWIRE@,$SER_HARDWIRE,;t t
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 4c2768d..af396cc 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -92,31 +92,15 @@ AC_SUBST(PACKAGE)
 # generate its Makefile.in.
 AM_INIT_AUTOMAKE(gdb, UNUSED-VERSION, [no-define])
 
-debugdir=${libdir}/debug
-	 
-AC_ARG_WITH(separate-debug-dir,
-[AS_HELP_STRING([--with-separate-debug-dir=PATH], [look for global separate debug info in this path [LIBDIR/debug]])],
-[debugdir="${withval}"])
-	
-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}'|'${exec_prefix}/'*)
-  AC_DEFINE(DEBUGDIR_RELOCATABLE, 1, [Define if the debug directory should be relocated when GDB is moved.])
-  ;;
-esac
+GDB_AC_WITH_DIR(DEBUGDIR, separate-debug-dir,
+    [look for global separate debug info in this path @<:@LIBDIR/debug@:>@],
+    [${libdir}/debug])
+
+# GDB's datadir relocation
+
+GDB_AC_WITH_DIR(GDB_DATADIR, gdb-datadir,
+    [look for global separate data files in this path @<:@DATADIR/gdb@:>@],
+    [${datadir}/gdb])
 
 AC_ARG_WITH(relocated-sources,
 AS_HELP_STRING([--with-relocated-sources=PATH], [automatically relocate this path for source files]),
@@ -1479,6 +1463,7 @@ fi
 
 dnl Handle optional features that can be enabled.
 
+target_sysroot_reloc=0
 AC_ARG_WITH(sysroot,
 AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@], [search for usr/lib et al within DIR]),
 [
@@ -1504,44 +1489,20 @@ AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@], [search for usr/lib et al within DI
  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
  '${prefix}'|'${prefix}/'*|\
  '${exec_prefix}'|'${exec_prefix}/'*)
-   t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
-   TARGET_SYSTEM_ROOT_DEFINE="$t"
+   target_sysroot_reloc=1
    ;;
  esac
 ], [
  TARGET_SYSTEM_ROOT=
  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
 ])
+TARGET_SYSTEM_ROOT_DEFINE="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE=$target_sysroot_reloc"
 AC_SUBST(TARGET_SYSTEM_ROOT)
 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 
-system_gdbinit=
-AC_ARG_WITH(system-gdbinit,
-AS_HELP_STRING([--with-system-gdbinit=FILE], [automatically load a system-wide gdbinit file]),
-[system_gdbinit=${withval}])
-
-AC_DEFINE_DIR(SYSTEM_GDBINIT, system_gdbinit,
-              [System-wide gdbinit file.])
-
-if test "x$prefix" = xNONE; then
-  test_prefix=$ac_default_prefix
-else
-  test_prefix=$prefix
-fi
-if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
-  test_exec_prefix=$test_prefix
-else
-  test_exec_prefix=$exec_prefix
-fi
-case ${system_gdbinit} in
- "${test_prefix}"|"${test_prefix}/"*|\
- "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
- '${prefix}'|'${prefix}/'*|\
- '${exec_prefix}'|'${exec_prefix}/'*)
-  AC_DEFINE(SYSTEM_GDBINIT_RELOCATABLE, 1,
-            [Define if the system-wide gdbinit file should be relocated when GDB is moved.])
-   ;;
-esac
+GDB_AC_WITH_DIR(SYSTEM_GDBINIT, system-gdbinit,
+    [automatically load a system-wide gdbinit file],
+    [])
 
 AC_ARG_ENABLE(werror,
   AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
diff --git a/gdb/defs.h b/gdb/defs.h
index 882a844..ee80659 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -153,6 +153,9 @@ extern int dbx_commands;
 /* System root path, used to find libraries etc.  */
 extern char *gdb_sysroot;
 
+/* GDB datadir, used to store data files.  */
+extern char *gdb_datadir;
+
 /* Search path for separate debug files.  */
 extern char *debug_file_directory;
 
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 4c41b50..e0f7a66 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,8 @@
+2009-04-23  Tom Tromey  <tromey@redhat.com>
+
+	* gdb.texinfo (Data Files): New node.
+	(GDB Files): Update menu.
+
 2009-04-23  Joel Brobecker  <brobecker@adacore.com>
 
 	* gdbint.texinfo (Defining Other Architecture Features): Remove
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 2cdac20..53fecf3 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -12734,6 +12734,7 @@ program.  To debug a core dump of a previous run, you must also tell
 * Files::                       Commands to specify files
 * Separate Debug Files::        Debugging information in separate files
 * Symbol Errors::               Errors reading symbol files
+* Data Files::                  GDB data files
 @end menu
 
 @node Files
@@ -13568,6 +13569,36 @@ it.
 
 @end table
 
+@node Data Files
+@section GDB Data Files
+
+@cindex prefix for data files
+@value{GDBN} will sometimes read an auxiliary data file.  These files
+are kept in a directory known as the @dfn{data directory}.
+
+You can set the data directory's name, and view the name @value{GDBN}
+is currently using.
+
+@table @code
+@kindex set data-directory
+@item set data-directory @var{directory}
+Set the directory which @value{GDBN} searches for auxiliary data files
+to @var{directory}.
+
+@kindex show data-directory
+@item show data-directory
+Show the directory @value{GDBN} searches for auxiliary data files.
+@end table
+
+@cindex default data directory
+@cindex @samp{--with-gdb-datadir}
+You can set the default data directory by using the configure-time
+@samp{--with-gdb-datadir} option.  If the data directory is inside
+@value{GDBN}'s configured binary prefix (set with @samp{--prefix} or
+@samp{--exec-prefix}), then the default data directory will be updated
+automatically if the installed @value{GDBN} is moved to a new
+location.
+
 @node Targets
 @chapter Specifying a Debugging Target
 
diff --git a/gdb/main.c b/gdb/main.c
index 86607d3..27870c7 100644
--- a/gdb/main.c
+++ b/gdb/main.c
@@ -64,6 +64,9 @@ int dbx_commands = 0;
 /* System root path, used to find libraries etc.  */
 char *gdb_sysroot = 0;
 
+/* GDB datadir, used to store data files.  */
+char *gdb_datadir = 0;
+
 struct ui_file *gdb_stdout;
 struct ui_file *gdb_stderr;
 struct ui_file *gdb_stdlog;
@@ -95,6 +98,57 @@ static void print_gdb_help (struct ui_file *);
 
 extern char *external_editor_command;
 
+/* Relocate a file or directory.  PROGNAME is the name by which gdb
+   was invoked (i.e., argv[0]).  INITIAL is the default value for the
+   file or directory.  FLAG is true if the value is relocatable, false
+   otherwise.  Returns a newly allocated string; this may return NULL
+   under the same conditions as make_relative_prefix.  */
+static char *
+relocate_path (const char *progname, const char *initial, int flag)
+{
+  if (flag)
+    return make_relative_prefix (progname, BINDIR, initial);
+  return xstrdup (initial);
+}
+
+/* Like relocate_path, but specifically checks for a directory.
+   INITIAL is relocated according to the rules of relocate_path.  If
+   the result is a directory, it is used; otherwise, INITIAL is used.
+   The chosen directory is then canonicalized using lrealpath.  This
+   function always returns a newly-allocated string.  */
+static char *
+relocate_directory (const char *progname, const char *initial, int flag)
+{
+  char *dir;
+
+  dir = relocate_path (progname, initial, flag);
+  if (dir)
+    {
+      struct stat s;
+
+      if (stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
+	{
+	  xfree (dir);
+	  dir = NULL;
+	}
+    }
+  if (!dir)
+    dir = xstrdup (initial);
+
+  /* Canonicalize the directory.  */
+  if (*dir)
+    {
+      char *canon_sysroot = lrealpath (dir);
+      if (canon_sysroot)
+	{
+	  xfree (dir);
+	  dir = canon_sysroot;
+	}
+    }
+
+  return dir;
+}
+
 /* Compute the locations of init files that GDB should source and return
    them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT.  If there is 
    no system gdbinit (resp. home gdbinit and local gdbinit) to be loaded,
@@ -115,24 +169,16 @@ get_init_files (char **system_gdbinit,
       struct stat homebuf, cwdbuf, s;
       char *homedir, *relocated_sysgdbinit;
 
-      sysgdbinit = SYSTEM_GDBINIT;
-      if (!sysgdbinit [0] || stat (sysgdbinit, &s) != 0)
-	sysgdbinit = NULL;
-
-#ifdef SYSTEM_GDBINIT_RELOCATABLE
-      relocated_sysgdbinit = make_relative_prefix (gdb_program_name, BINDIR,
-						   SYSTEM_GDBINIT);
-      if (relocated_sysgdbinit)
+      if (SYSTEM_GDBINIT[0])
 	{
-	  struct stat s;
-	  int res = 0;
-
-	  if (stat (relocated_sysgdbinit, &s) == 0)
+	  relocated_sysgdbinit = relocate_path (gdb_program_name,
+						SYSTEM_GDBINIT,
+						SYSTEM_GDBINIT_RELOCATABLE);
+	  if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
 	    sysgdbinit = relocated_sysgdbinit;
 	  else
 	    xfree (relocated_sysgdbinit);
 	}
-#endif
 
       homedir = getenv ("HOME");
 
@@ -291,73 +337,14 @@ captured_main (void *data)
   current_directory = gdb_dirbuf;
 
   /* Set the sysroot path.  */
-#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
-  gdb_sysroot = make_relative_prefix (argv[0], BINDIR, TARGET_SYSTEM_ROOT);
-  if (gdb_sysroot)
-    {
-      struct stat s;
-      int res = 0;
-
-      if (stat (gdb_sysroot, &s) == 0)
-	if (S_ISDIR (s.st_mode))
-	  res = 1;
+  gdb_sysroot = relocate_directory (argv[0], TARGET_SYSTEM_ROOT,
+				    TARGET_SYSTEM_ROOT_RELOCATABLE);
 
-      if (res == 0)
-	{
-	  xfree (gdb_sysroot);
-	  gdb_sysroot = xstrdup (TARGET_SYSTEM_ROOT);
-	}
-    }
-  else
-    gdb_sysroot = xstrdup (TARGET_SYSTEM_ROOT);
-#else
-  gdb_sysroot = xstrdup (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;
-	}
-    }
+  debug_file_directory = relocate_directory (argv[0], DEBUGDIR,
+					     DEBUGDIR_RELOCATABLE);
 
-#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
-  debug_file_directory = xstrdup (DEBUGDIR);
-#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;
-	}
-    }
+  gdb_datadir = relocate_directory (argv[0], GDB_DATADIR,
+				    GDB_DATADIR_RELOCATABLE);
 
   get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
 
diff --git a/gdb/top.c b/gdb/top.c
index 3aff25f..5654535 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -1619,6 +1619,15 @@ Use \"on\" to enable the notification, and \"off\" to disable it."),
 			   NULL,
 			   show_exec_done_display_p,
 			   &setlist, &showlist);
+
+  add_setshow_filename_cmd ("data-directory", class_maintenance,
+                           &gdb_datadir, _("Set GDB's data directory."),
+                           _("Show GDB's data directory."),
+                           _("\
+When set, GDB uses the specified path to search for data files."),
+                           NULL, NULL,
+                           &setlist,
+                           &showlist);
 }
 
 void