* gdbtk.c (gdbtk_init): Set the fputs_unfiltered_hook to
gdbtk_fputs BEFORE you eval script. The old code was setting it
to null until after you did this, but that is wrong, because it
will cause the output of CAUGHT errors to go to gdb_stderr, which
is wrong. You only want to write errors to the console if the
eval generates an error.
* gdbtk.c (gdbtk_init): Create tcl warp_pointer command
for use with testing.
* gdbtk-cmds.c (gdb_loc): Fix for case where there are only
minimal symbols. Also make gdb_loc return the shared library
the location is in, if it is in one.
* gdbtk-cmds.c: Can't start using new API names yet. Switch
back
to calling cygwin32_ funcs until some time has passed...
* gdbtk.c: Ditto. Also, include sys/cygwin.h for Cygwin,
instead
of providing own proto.
Changes to account for name change from cygwin32 to cygwin and
clean up Win32-related ifdefs.
* configure.tgt: check for cygwin* instead of cygwin32.
New cygwin gdb_target variable loses the "32".
* configure.host: check for cygwin* instead of cygwin32.
New cygwin gdb_host variable loses the "32".
* configure.in: test __CYGWIN__ instead of __CYGWIN32__,
rename gdb_cv_os_cygwin32 variable to drop the "32". Call
AM_EXEEXT instead of AC_EXEEXT since that isn't in a released
autoconf yet.
* configure: regenerate.
* main.c: drop "32" from cygwin_ funcs, include sys/cygwin.h
where
cygwin path conv protos live, instead of adding a proto here
for
them here.
* {main.c, ser-tcp.c, ser-unix.c, top.c}: check __CYGWIN__
instead of __CYGWIN32__.
* source.c: thoughout, check _WIN32 instead of WIN32.
* config/i386/cygwin32.mh: delete.
* config/i386/cygwin.mh: new file, was cygwin32.mh.
* config/i386/cygwin32.mt: delete.
* config/i386/cygwin.mt: new file, was cygwin32.mt.
* config/i386/tm-cygwin32.h: delete.
* config/i386/tm-cygwin.h: new file, was tm-cygwin32.h.
* config/i386/xm-cygwin32.h: delete.
* config/i386/xm-cygwin.h: new file, was xm-cygwin32.h.
* config/i386/xm-windows.h: #include xm-cygwin.h now.
* config/powerpc/cygwin32.mh: delete.
* config/powerpc/cygwin.mh: new file, was cygwin32.mh.
* config/powerpc/cygwin32.mt: delete.
* config/powerpc/cygwin.mt: new file, was cygwin32.mt.
* config/powerpc/tm-cygwin32.h: delete.
* config/powerpc/tm-cygwin.h: new file, was tm-cygwin32.h.
* config/powerpc/xm-cygwin32.h: delete.
* config/powerpc/xm-cygwin.h: new file, was xm-cygwin32.h.
* rdi-share/aclocal.m4: regenerate with aclocal.
* rdi-share/configure: regenerate with autoconf.
* rdi-share/{host.h, hostchan.c, hostchan.h, serdrv.c,
* serpardr.c,
unixcomm.c}: check __CYGWIN__ instead of __CYGWIN32__.
* console.tcl (complete): I added the ability to pass from_tty
from gdb_cmd to the underlying commands. Pass 1 when the
command is invoked from the console.
* interface.tcl (gdbtk_tcl_tstart, gdbtk_tcl_tstop): Run the
src window's do_tstop method rather than manipulating the
widgets by hand.
* src.tcl (build_win): Redo the packing so that the function
combobox doesn't push all the other combo-boxes off the screen
if it has a very long function name in it.
* srcbar.tcl (do_tstop): Added a mode that just changes the
GUI, which can be called from console hooks.
* srctextwin.tcl: Fixed some bugs I introduced in setting
breakpoints in the assembly & mixed mode windows. Dropped
the notion of joint breakpoint images for lines that have
breakpoints of two separate types. Too fragile.
Also added the "dont_change_appearance" flag, used in the
continue_to_here method to tell the GUI not to reflect the
temporary disabling of all the breakpoints.
* toolbar.tcl (insert_buttons): Added a little more error-checking.
Thu Nov 12 15:20:15 1998 Jim Ingham <jingham@cygnus.com>
* gdbtk-cmds.c (gdb_cmd): Added an optional second argument to the
gdb_cmd, which is from_tty. This is passed to the gdb command
parser. It is 0 by default, and the console window passes 1.
* gdbtk-cmds.c: moved disassemble_from_exec from gdbtk.c to gdbtk-cmds.c
with all the other link-var'ed variables
* gdbtk-hooks.c (gdbtk_trace_find): Only run the hook functions if
we are called from_tty.
* gdbtk-hooks.c (gdbtk_trace_start_stop): Set the trace buttons
from a trace_start_command callback rather than doing it as a
special case in gdb_cmd.
* tracepoint.c (tstart_command, tstop_command): Add call to
trace_start_stop_hook here.
* blockframe.c (find_pc_sect_partial_function): Add braces to avoid
possible nested-if confusion.
* breakpoint.c (breakpoint_here_p): Ditto.
(breakpoint_inserted_here_p): Ditto.
(breakpoint_thread_match): Ditto.
* gnu-regex.c: Define _REGEX_RE_COMP only if it isn't already defined.
* gnu-regex.h: Define _REGEX_RE_COMP to pick up old compatability
prototypes.
* symtab.h: Add prototype for _initialize_source.
* value.h: Add prototype for _initialize_value.
* defs.h: Include sys/types.h or stddef.h to get size_t.
(make_cleanup): Add make_cleanup_func typedef and switch to using
a prototype for this function.
(mfree): Add prototypes for mmalloc, mrealloc, mfree if we aren't
using mmalloc.
* ax-gdb.c breakpoint.c coffread.c corelow.c dbxread.c dwarf2read.c
dwarfread.c elfread.c eval.c exec.c gdbtk-cmds.c gdbtk.c infcmd.c
infrun.c mipsread.c nlmread.c os9kread.c parse.c printcmd.c symfile.c
symmisc.c symtab.c thread.c top.c tracepoint.c typeprint.c valops.c:
Cast parameters passed to make_cleanup to use the new
make_cleanup_func typedef.
More warning cleanups. There are still a bunch of places where the first
argument to make_cleanup is not cast to (make_cleanup_func); these are
either due to the function fitting the make_cleanup_func specification
already (e.g. free()) or they are in files that weren't compiled when
I did my make on a Linux native system. Bwahahaha. You can see them
like this:
grep make_cleanup\ * | grep -v make_cleanup_func
I'll surely go back and clean up the remaining suspicious calls in
GDB one of these days. :-)
* gdbtk.c (gdbtk_call_command): Removed because it is now
in gdbtk-hooks.c
(null_routine): Removed.
* gdbtk-hooks.c (tracepoint_notify): Fix sprintf to
match number of arguments.
* gdbtk-cmds.c (gdb_loc): When calling gdb_loc with an
argument, call find_pc_line() to get a complete
symtab_and_line struct.
* symtab.c (decode_line_2): Instead of printing a prompt
and calling command_line_input() without a prompt, just
call it with the proper args. This makes the GUI work too.
Sat Jul 18 12:28:39 1998 Martin M. Hunt <hunt@cygnus.com>
* gdbtk.c (gdbtk_cleanup): Add call to tcl function
gdbtk_cleanup. We need this so the GUI gets to clean
up no matter how GDB exits.
* main.tcl (gdbtk_preloop): Call gdbtk_idle on spec. If there was an
error in loading an executible specified on the command line,
then the pre_add_symbol hook would have called gdbtk_busy but
the corresponding call to gdbtk_idle would not have occured.
Also changed some catch calls so they didn't use
"catch {set foo [real_command]}"
but rather the more efficient:
"catch {real_command} foo"
* register.tcl: more catch cleanups
* src.tcl: more catch cleanups
* stack.tcl: more catch cleanups
* target.tcl: more catch cleanups
* tdump.tcl: more catch cleanups
* variables.tcl: more catch cleanups
* watch.tcl: more catch cleanups
* gdbtk.c (gdbtk_init): Fixed a bug in the startup code on Windows
that caused gdbtk not to find the share directory unless
GDBTK_LIBRARY was set.
* gdbtk.c: removed all the commands and hooks from this file so
now it contains only the startup code.
* gdbtk_cmds.c: New file - this contains all the Tcl commands that
gdb defines. All the old commands were moved here, the
string-based commands were converted to object commands, and the
object-based commands were all converted to uniformly use the
call_wrapper. A new function, Gdbtk_Init was added to centralize
initializing the gdb package. Also added gdbtk as a package
into gdbtk_interp.
* gdbtk_hooks.c: New file - All the hooks were moved here, and a new
function, gdbtk_add_hooks was added to centralize adding all these
hook functions. gdbtk_fputs was also modified to handle the new
result_ptr structure. See the comments in gdbtk.h for more
details.
* gdbtk.h: New file - this contains all the defines and globals
shared by gdbtk.c, gdbtk_cmds.c & gdbtk_hooks.c
* Makefile.in, configure.in & configure: mutatis mutandi for the
new files.
TYPES_NAMESPACE, METHODS_NAMESPACE, and VARIABLES_NAMESPACE used by
new search_symbols.
Add prototype for search_symbols and free_search_symbols.
* symtab.c (list_symbols): Rewrite to use new search_symbols.
(file_matches): New helper function for search_symbols.
(free_search_symbols): New function which frees data returned from
search_symbols.
(print_symbol_info): New helper function which prints info about a
matched symbol to stdout. Extracted from old list_symbols.
(print_msymbol_info): New helper function which prints info about
a matched msymbol to stdout. Extracted from old list_symbols.
(symtab_symbol_info): Extracted from old list_symbols.
(variables_info): Use symtab_symbol_info.
(functions_info): Use symtab_symbol_info.
(types_info): Use symtab_symbol_info.
(rbreak_command): Rewrite to use new search_symbols.
* gdbtk.c: Change all references to static global "interp" to
"gdbtk_interp" and export this global.
(gdbtk_init): If gdbtk_source_filename is not NULL, source this file
into the interpreter when it goes idle.
Add new command "gdb_search".
(gdb_search): New function which searches the symbol table.
(gdbtk_test): New function called by main when the --tclcommand
option is used.
* main.c (main): Add a new option "--tclcommand" which is used
by the testsuite to source a file into the interpreter when it
goes idle.
Changed to pass PC as arg and return 1 if valid (0 otherwise).
symtab.h: change prototype to match
symtab.c (find_line_pc_range): use new interface
breakpoint.c (resolve_sal_pc): ditto
gdbtk.c (gdb_set_bp): ditto
* gdbtk.c (gdbtk_init): Add elements to the auto_path AS LIST
ELEMENTS. This allows gdbtk to work when installed in a directory
which has a space in the path. D. Moseley pointed out the bug.
* gdbtk.c: Added hooks to run gdbtk under the TclPro debugger.
To do this, build gdbtk with:
make CFLAGS="-g -DTCLPRO_DEBUGGER"
Then set the environment variable TCLPRO_DEBUG_DIR to point to
wherever you have installed the TclPro debugger. Finally, in
the Alpha of the TclPro Debugger, you have to start up the
TclPro Debugger BEFORE you start gdbtk. Unfortunately, the
debugger does not understand Itcl 1.5 style classes...
* .Sanitize: Sanitize out references to the TclPro debugger,
since it is not yet released.
* gdbtk.c: merged:
- Elena Zannoni <ezannoni@kwikemart.cygnus.com>
(call_obj_wrapper): in case of error, copy the
error message from the result to the error_string.
(gdbtk_fputs): add comments.
(gdb_actions_command): call validate_actionline when installing the
tracepoint, to do the syntax checking of the actions for us.
- Elena Zannoni <ezannoni@kwikemart.cygnus.com>
(gdb_get_trace_frame_num): new function to get the
trace frame number from gdb.
(gdbtk_init): added new command gdb_get_trace_frame_num.
- Jim Blandy <jimb@zwingli.cygnus.com>
(struct wrapped_call_objs): Change the `func' member to
be a Tcl_ObjCmdProc, not an Tcl_CmdProc, since it accepts a vector
of objects as arguments. Change the object vector to be const,
since that's what all the users of this structure seem to expect.
(call_obj_wrapper): Cast clientData properly before storing it in
the wrapped_args structure.
* gdbtk.c (_initialize_gdbtk): Get rid of the console. Patch from
Chris Faylor (cgf@cygnus.com).
* configure.in: Link cygwin32 with subsystem console.
* configure: Regenerated
that
we can use this member to track real timeouts.
(hardwire_readchar): Modify for cygwin32 so that we only ever use a real
system timeout of one second. Track the "real" timeout as a series of th
ese
one second timeouts.
Call ui_loop_hook to keep the gui alive.
* top.c: Define new hook for cygwin32, "ui_loop_hook".
* gdbtk.c (gdbtk_init): Add ui_loop_hook for CygWin32 to work around
update problems.
* gdbtk.c: reinserted the changes that were accidentally deleted:
(_initialize_gdbtk): Use correct device names in
cygwin-specific call (cosmetic change).
(gdbtk_ignorable_warning): removed va_list parameter,
which was unused.
(_initialize_gdbtk): add cygwin32 specific code to
allow `gdb -nw' to work when specified specified from a windows
console-mode command line.
* ChangeLog: moved Chris Faylor's comment to ChangeLog-gdbtk
* gdbtk.c: Fixed a goof in the definition of the gdb_get_args &
gdb_get_locals Tcl commands. Moved the previous ChangeLog entry
from ChangeLog to ChangeLog-gdbtk...
* gdbtk.c: Add an object call wrapper for the new Tcl_Obj based
commands. This way the obj commands will also go through
catch_errors. This is just a bandaid while I rewrite the
string-based commands to use the object format.
* gdbtk.c (_initialize_gdbtk): add cygwin32 specific code to
allow `gdb -nw' to work when specified specified from a windows
console-mode command line.
* utils.c: (warning) added call to warning_hook
* source.c: (find_source_lines) modified to call warning in case
of source vs. executable time stamp mismatch. Simplified object
file check. Initialized mtime to 0.
* defs.h: added warning_hook prototype
* top.c: added warning_hook prototype.
* gdbtk.c: (perror_with_name_wrapper) new function to call
perror_with_name safely.
(gdb_loadfile) added source vs. executable time stamp check.
(gdbtk_warning) new function to pass a warning message to the gui.
(gdbtk_ignorable_warning) new function to pass a warning
to the gui. Used only for the src. vs. exec check.
(gdbtk_init) added warning_hook
added include <sys/stat.h>
timer interval a little.
(gdbtk_stop_timer): Include on all platforms.
(gdbtk_wait): No more signals! Use a timer on all platforms to keep the
GUI alive.
(gdbtk_init): Remove FIOASYNC and all x_fd references. Now using timers
on all platforms.
* gdbtk.c: (gdb_trace_status) new function.
(gdbtk_init) added command "gdb_is_tracing".
(tracepoint_notify) added passcount information.
* tracepoint.c (trace_status_command): Recognize a boolean return
value from the stub to indicate whether trace experiment is
running. Export this value as a global state variable
(trace_running_p) for use by the GUI. (from Michael Snyder)
(trace_pass_command) added call to modify_tracepoint_hook.
* tracepoint.h export trace_running_p
* gdbtk.c (gdbtk_fputs): Insert fencepost.
(gdb_loc): Correct pc calculation.
(gdb_immediate_command): Return if a load is in progress.
(gdb_cmd): Return if a load is in progress.
(target_stop_wrapper): New function.
(gdb_stop): Call target_stop_wrapper.
(x_event): Add fencepost and optimize load cancel check.
(gdbtk_start_timer): Set up structs only once.
(gdbtk_stop_timer): Just use preset structs to set timer parameters.
(gdb_loadfile): If file cannot be loaded, return error message.
(gdb_loadfile): Add space before tab so that lines without
a '-' can later be changed to have one.
merged changes from Foundry (list follows by file/author):
- Tom Tromey <tromey@cygnus.com>
* Makefile.in (gdbres.o): New target.
(WINDRES): New define.
* configure: Rebuilt.
* configure.in (WINDRES): Define.
(CONFIG_OBS): Include gdbres.o on Windows.
* gdbtool.ico: New file.
* gdb.rc: New file.
* ser-unix.c
- Keith Seitz <keiths@onions.cygnus.com>
(wait_for): Don't reset the timeout_remaining for CYGWIN32,
since we now effectively poll the serial port.
Don't reset the current_timeout, either, since this member is used
by hardwire_readchar to track the timeout and call the ui_loop_hook.
(hardwire_readchar): Poll the serial port for Cygwin32. We timeout every
second, update the UI, and loop around doing this until we have hit the real
timeout or we get data or an error. This will allow the UI to stay active
while gdb is "blocked" talking to the target.
- Martin M. Hunt <hunt@cygnus.com>
(wait_for): Do reset current_timeout
because it is only used to keep track of what the
current timeout for the scb is.
* top.c
- Martin M. Hunt <hunt@cygnus.com>
(quit_confirm): Change exit message again
for GUI.
(pc_changed_hook): Add prototype.
- Tom Tromey <tromey@cygnus.com>
(quit_confirm): Added missing `else'.
(quit_confirm): Special-case message if init_ui_hook is
set.
* symtab.c
- Martin M. Hunt <hunt@cygnus.com>
(find_pc_sect_line): If no symbol information
is found, return correct pc anyway.
(find_methods): Comment out an apparently
bogus error message because it messes up Foundry.
* serial.c
- Martin M. Hunt <hunt@cygnus.com>
(_initialize_serial): Add a description of
"set remotelogbase".
* findvar.c
- Martin M. Hunt <hunt@cygnus.com>
(write_register_gen): Add call to
pc_changed_hook if the PC is being changed.
* defs.h
- Martin M. Hunt <hunt@cygnus.com>
(pc_changed_hook): Define.
* command.c
- Martin M. Hunt <hunt@cygnus.com>
(do_setshow_command): If no arguments are supplied,
don't dump core, instead print out an error message.
* breakpoint.c
- Martin M. Hunt <hunt@cygnus.com>
Make set_raw_breakpoint, set_breakpoint_count,
and breakpoint_count non-static so they are accessible from
gdbtk.c.
(enable_breakpoint): Enable breakpoint
with same disposition instead of changing all breakpoints
to donttouch.
* annotate.h
- Keith Seitz <keiths@onions.cygnus.com>
Add declarations for annotation hooks.
* annotate.c
- Keith Seitz <keiths@onions.cygnus.com>
Add hooks: annotate_starting_hook, annotate_stopped_hook,
annotate_signalled_hook, annotate_exited_hook.
(annotate_starting): If hook exists, call it instead.
(annotate_stopped): If hook exists, call it instead.
(annotate_exited): If hook exists, call it instead.
(annotate_signalled): If hook exists, call it instead.
Sat Mar 21 19:34:49 1998 Elena Zannoni <ezannoni@kwikemart.cygnus.com>
Merged changes from Foundry: list follows by author:
- Tom Tromey <tromey@cygnus.com>
* Makefile.in (gdbres.o): New target.
(WINDRES): New define.
* configure: Rebuilt.
* configure.in (WINDRES): Define.
(CONFIG_OBS): Include gdbres.o on Windows.
* gdbtool.ico: New file.
* gdb.rc: New file.
* gdbtk.c (gdbtk_init): Call ide_create_messagebox_command.
(gdbtk_cleanup): Call ide_interface_deregister_all.
(gdbtk_init): Pass event handle to cleanup.
(TclDebug): Use Tcl_Merge to construct command.
(gdbtk_init): Call ide_create_cygwin_path_command.
- Martin M. Hunt <hunt@cygnus.com>
* gdbtk.c (gdb_set_bp): Set addr_string for bp.
(gdb_get_breakpoint_info): Demangle function
names in breakpoint info.
Include "demangle.h".
(gdb_loc, gdb_listfuncs): Demangle C++
function names.
(gdb_set_bp): Properly quote filename to fix
problems with spaces. Send pc back as a hex string.
(gdb_listfuncs): Remove debugging line.
Turn off some debugging lines.
(breakpoint_notify): Return correct line number.
(gdb_get_breakpoint_info): Return correct line number.
(gdb_set_bp): New function to provide a better way to
set breakpoints.
(gdbtk_readline, gdbtk_readline_begin): Memory
allocated by tcl needs to be freed by Tcl_Free().
(find_file_in_dir): Deleted.
(gdb_find_file_command): Call full_lookup_symtab().
(gdb_listfuncs): Call full_lookup_symtab().
(full_lookup_symtab): New function. Like lookup_symtab
except handles multiple files with the same basename,
full pathnames, and always sets symtab->fullname.
(gdb_loadfile): Call full_lookup_symtab(). Clear
realloc'd memory.
(gdb_loadfile): Don't tag lines without source.
Tag source lines with source_tag.
(gdb_find_file_command, find_file_in_dir):
Rewrite. Now searches symtabs and psymtabs for a match
on the partial or full filename. Returns the full pathname.
(gdb_loadfile): Realloc additional memory
if someone loads in a file with more than 160,000
lines. I don't know if this really works because
I don't have enough memory to test it.
(gdb_sourcelines): Deleted.
(gdb_loadfile): New function. Takes a text widget
and loads it with the contents of a file. Marks
and tags source lines.
(pc_changed): New function.
(get_pc_register): Returns the value of
the PC to GDB.
(gdb_loc): If looking on the stack, return
real pc along with calling source line.
(gdb_loc): Return "" instead of "N/A" if
filename is not found.
(gdb_get_breakpoint_info): Same.
(get_register): For Natural mode, set format to 0.
Minor bugfixes from keiths.
(TclDebug): New function for debugging use.
(gdb_loc): Return correct PC for frames
that are not the innermost frame.
(gdb_listfiles): Rewritten to use object
API. Now takes an optional dirname which will cause
only files in that directory or its subdirectories
to be returned. Now returns basenames instead of
full pathnames.
(gdb_cmd): Set/reset load_in_progress flag.
(call_wrapper): Don't pop up dialog for errors in
downloads; just abort download.
(gdbtk_load_hash): Set return value correctly.
- Keith Seitz <keiths@onions.cygnus.com>
* gdbtk.c (gdbtk_init): Define the ui_loop_hook so that it can be
called by routines which might block, allowing us to update the GUI.
(gdbtk_wait): Move timer calls to annotation hooks.
(gdbtk_init): Define the annotation hooks.
(gdbtk_annotate_starting): New function for cygwin32 hosts.
(gdbtk_annotate_stopped): New function for cygwin32 hosts.
(gdbtk_annotate_exited): New function for cygwin32 hosts.
(gdbtk_annotate_signalled): New function. for cygwin32 hosts.
(gdbtk_init): Use gdbtk_print_frame_info hook.
(gdbtk_print_frame_info): New function which sets current_source_symtab
based on the given symtab and line info.
(gdb_immediate_command): New function which does
not buffer any
output. (Contrast to gdb_cmd.)
(gdb_prompt_command): New function to return gdb's prompt.
(find_file_in_dir): New functon which searches source paths
for a given filename.
(gdb_find_file): New function which returns path to given file -- uses
find_file_in_dir.
(gdbtk_init): Install "gdb_immediate", "gdb_find_file", and
"gdb_prompt"
commands into interpreter.
- Ian Lance Taylor <ian@cygnus.com>
* gdbtk.c (gdbtk_timer_going): If __CYGWIN32__, new static
variable.
(gdb_cmd): If __CYGWIN32__, if executing the load command, call
gdbtk_start_timer and gdbtk_stop_timer.
(call_wrapper): If __CYGWIN32__, if the timer is going, turn it
off. Clear load_in_progress.
(x_event): If load_in_progress, quit if download_cancel_ok.
(gdbtk_start_timer): Set gdbtk_timer_going.
(gdbtk_stop_timer): Clear gdbtk_timer_going.
(gdbtk_wait): Call x_event.
(gdbtk_init): Call ide_create_win_grab_command if
__CYGIN32__.
(gdb_clear_file): Clear stop_pc.
if it exists.
Remove static declaration of free_actions.
* tracepoint.h: Add declaration of free_actions.
* gdbtk.c (gdbtk_modify_tracepoint): Define new tracepoint modification
hook.
(gdbtk_print_frame_info): Define this hook so that current_source_symtab
is set properly.
(gdb_actions_command): Use free_actions () from tracepoint.c/h.
* gdbtk.c: Merge from Foundry branch.
(TclDebug): New debugging function.
(gdb_loc): For frames, find address of calling function
instead of whatever is on the stack (usually the next
instruction).
(gdb_listfiles): Takes an optional pathname argument and
returns an alphabetized list of basenames of files in the
path.
and "post_add_symbol_hook". These hooks are called before we begin reading
symbols, and after we finish.
(generic_load): Use new symbol reading hooks and get rid of compiler warning.
* gdbtk.c (gdbtk_init): Add hooks for pre- and post-symbol reading.
(gdbtk_pre_add_symbol): New function: the pre-add-symbol hook.
(gdbtk_post_add_symbol): New function: the post-add-symbol hook.
(find_file_in_dir): New function. Moved the guts of gdb_find_file_command
into here to allow its use by others.
(gdb_loc): Use find_file_in_dir to return the real path to the file
(or "N/A" if we can't find it).
* configure.in (TIX_LIB_EXT): Define new variable for those special cases
when TCL_SHLIB_SUFFIX is not enough to specify the dependency.
* configure: Regenerate.
