Re: [Plplot-devel] tkwin.c is now split and I have also reorganized the linking on Linux

[Alan W. I. <ir...@be...>]

I have implemented this change in CVS by simply moving TKWIN_OBJ =
Plplotter_Init$O plplotter$O tkwin_common$O from libplplottcltkd to
drivers/tkwind_drv.so.

Maurice, could I have your comments on doing something similar for the xwin
driver?  In particular is it possible to move plframe$O from libplplottcltk
to xwind_drv.so without introducing a libplplottcltk dependency on
xwind_drv.so and thus introducing a cross-dependency between the two since
xwind_drv.so will always depend on libplplottcltk?  I resolved that
potential cross-dependency issue in the present case by also moving
Plplotter_Init$O to tkwind_drv.so because there was nothing else in
libplplottcltk that depended on Plplotter_Init$O.  However, I think in the
plframe$O case, there may be other objects within libplplottcltk that depend
upon it and which themselves cannot be moved to xwind_drv.so without
creating other cross-dependencies. If you cannot see any way to move
plframe$O and related objects to xwind_drv.so without creating
cross-dependencies, then I suggest you go ahead with the alternative
solution you have proposed of using escape functions.

The rest of this e-mail concerns some additional tkwin issues and is mostly
directed to Vince.

I have left tkwin_common.c separate for the moment because I am of two minds
about reuniting it with tkwin.c.  On the one hand, it is one extra file that
Vince has to keep track of.  On the other hand, my instinct is to keep this
file separate since conceptually it is different from the rest of xwin
(i.e.,both xwin.c and plplotter.c depend on the functions defined inside
it), and I prefer not to destroy the work I did to separate it. Admittedly,
that separation is not necessary at this time, but it might make future
changes easier to keep things split. I will leave this decision to your best
judgement, Vince, since you are the one most familiar with this area of
PLplot.

The other immediate remaining issue is what symlinks should be set up to
$prefix/lib/plplot5.1.0/drivers/tkwind_drv.so in the installed case.  I
believe that question is related to Tcl/Tk packaging issues and what
directories are searched by the load command for installed dll's.

So Vince, will you do the next steps in CVS to package everything for the
installed case?  Just tell me what directory and name (probably
libtkwin$(LIB_TAG).so) you need for the shared object that is loaded, and I
will symlink it on the Linux/Unix side to the appropriate tkwind_drv.so
install location.  Just to remind you what tcl stuff in installed, here is
the contents of $prefix/lib/plplot5.1.0/tcl currently installed on my
system.

ls /usr/local/plplot/lib/plplot5.1.0/tcl/
FileSelector.tcl  cmap0a.pal   cmap1d.pal      plcolor.tcl*    pltools.tcl
PLWin.itk         cmap1a.pal   help_gui.tcl    plconfig.tcl    plwidget.tcl
PLXWin.itk        cmap1a1.pal  help_keys.tcl   pldefaults.tcl  tclIndex
Pltkwin.tcl       cmap1b.pal   help_tcltk.tcl  plplot.tcl
about.tcl         cmap1c.pal   plclient.tcl    plserver.tcl

Also, you haven't yet answered my question about running tcldemos.tcl from
tclsh and tkdemos.tcl from wish.  I know we used to be able to do that on
the tea branch years ago, and I would like to see that neat functionality
available on cvs HEAD as well.

Alan

email: ir...@be...
phone: 250-727-2902	FAX: 250-721-7715
snail-mail:
Dr. Alan W. Irwin
Department of Physics and Astronomy,
University of Victoria, P.O. Box 3055,
Victoria, British Columbia, Canada, V8W 3P6
__________________________

Linux-powered astrophysics
__________________________

On Tue, 30 Jul 2002, Vince Darley wrote:

> I think this is the right way to go --- makes sense both logically, and
> 'symbol-link-ably', at least to me.
>
> thanks for investigating and carrying out all this tricky work.
>
> -- Vince
>
> <http://www.santafe.edu/~vince>
>
>
> On Mon, 29 Jul 2002, Alan W. Irwin wrote:
>
> > On Mon, 29 Jul 2002, Vince Darley wrote:
> >
> > > >>
> > > A separate tkwin_common.c is necessary because both plplotter.c and (the
> > > new)
> > > tkwin.c depend on the functions defined in there.
> > > >>
> > >
> > > I have to say, I find this crazy!  It is not possible to use plplotter.c
> > > without tkwin.c and not possible to use tkwin.c without plplotter.c so,
> > > please, put them in the same .so!
> >
> > OK. A quick visual check of the source codes seemed to indicate moving
> > Plplotter_Init.o, plplotter.o tkwin_common.o from libplplottcltk to
> > drivers/tkwind_drv.so would work since nothing else in libplplottcltk seems
> > to depend on anything in those functions.
> >
> > IMPORTANT *all* these functions have to be moved since Plplotter_Init.o
> > depends on plplotter, and if you leave it behind you create a
> > cross-dependency and this affects the wish recipe, see below.
> >
> > Indeed when I tried that locally the -dev tkwin worked fine, i.e., gave its
> > usual message without any linking troubles at all.
> >
> > Same for plserver.  runAllDemos.tcl worked fine.
> >
> > But now the wish recipe we had before doesn't work...
> >
> > wish
> > % source pldefaults.tcl
> > % load libplplottcltkd.so Plplotter
> > couldn't find procedure Plplotter_Init
> >
> > Obviously it is looking for  Plplotter_Init inside
> > libplplottcltkd.so and cannot find it since that has been moved
> > to tkwind_drv.so.
> >
> > So now the new wish recipe from plplot/tmp should be
> >
> > source pldefaults.tcl
> > load drivers/tkwind_drv.so Plplotter
> > package provide Plplotter 5.1.0
> > source runAllDemos.tcl
> >
> > which works fine and makes sense under the hierarchical linking rules that
> > are now in place since tkwin depends on and links to libplplottcltk.
> > However, attempting to find tkwind_drv at its install location of
> > $prefix/lib/plplot5.1.0/drivers/tkwind_drv.so will cause some trouble.  For
> > example, you will probably have to specify the complete path name to get it.
> > Ultimately, this could be solved with a symlink.
> >
> > Vince, if this is the way you want to go (reuniting tkwin_common with tkwin
> > and moving Plplotter_Init.o and plplotter.o from libplplottcltk to
> > drivers/tkwind_drv.so while accepting the wish recipe changes that result)
> > that is fine with me, but I need direct confirmation from you before I go to
> > the additional configuration work to make this the permanent solution.
> >
> > Alan
> >
> >
>
>