[Plplot-devel] current tkwin device cannot be built on Linux because of name clashes

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

Vince,

Joao told me privately, and I confirmed that you cannot build the tkwin
device in its present state on Linux.  However, once some nameclashes are
resolved it might work.

For other Linux users who might be interested in trying this,
to attempt access to this device simply add the configuration
option --with-tkwin

I have just made some commits to fix up some minor problems (the worst being
the incorrect device number which should be 45 and not 44).

Here are some additional problems which I could workaround:

(1) pltools.tcl and plwidget.tcl nameclash between files in tk and tk-x-plat.
Could you please rename the tk-x-plat files to something else so the tk
driver can comfortably coexist with yours?  My workaround was to locally
symlink those files when I needed them, but that is not a general
solution since it clobbers the tk driver.

(2) Your code depends on tkInt.h which is an internal header used by Tk
which is supposedly not for public use.  (This is very similar to the
distinction we make between common and public API.) Presumably, you are
using some internal Tk API, which they did not want you to use.  Is there
some alternative from their more normal API which you could use instead so
you could drop tkInt.h altogether?  Many Linux distributions (such as SuSe
used by Joao) do not have this internal header file.  Debian woody happens
to include the private headers so I worked around the problem by local
changes to my Makefile to put the following on the compile line:

-I /usr/include/tcl8.3/tk-private/generic/ -DHAVE_LIMITS_H

But this will be impossible for most other distributions so a better solution
is to drop the dependence on tkInt.h (and private Tk functions) altogether.

Note, there were some compilation warnings with this fix which you may want
to address:

plplot/pltkwd.h:160: warning: struct PlFrame' declared inside parameter list
plplot/pltkwd.h:160: warning: its scope is only this definition or
declaration, which is probably not what you want

Finally, we come to the showstopper which is lots of link errors due to
nameclashes with the xwin driver:

cd tmp; make default
make[1]: Entering directory `/home/software/plplot_cvs/HEAD/plplot_working3/tmp'
rm -f libplplotd.so.5.1.0

Building shared library

cd shared; \
gcc -shared -fPIC -o ../libplplotd.so.5.1.0 \
	-Wl,-soname -Wl,libplplotd.so.5 \
	pdfutils.o plargs.o plbox.o plbuf.o plcont.o plcore.o plctrl.o plcvt.o pldtik.o plfill.o plhist.o plline.o plmap.o plot3d.o plpage.o plsdef.o plshade.o plsym.o pltick.o plvpor.o plwind.o plstripc.o plimage.o tclAPI.o Pltk_Init.o tcpip.o plframe.o plr.o xwin.o tk.o tkwin.o sc3d.o sccont.o scstubs.o  javabind.o tclMain.o  tkMain.o  strutil.o sfstubs.o  -L.. -ltclmatrixd -litk3.1 -ltk8.3 -litcl3.1 -ltcl8.3 -L/usr/X11R6/lib -lX11 -ldl -lm -lg2c
tkwin.o(.data+0x4): multiple definition of `plplot_ccmap'
xwin.o(.data+0x8): first defined here
tkwin.o: In function `plX_setBGFG':
tkwin.o(.text+0x1650): multiple definition of `plX_setBGFG'
xwin.o(.text+0x2b9c): first defined here
/usr/bin/ld: Warning: size of symbol `plX_setBGFG' changed from 264 to 209 in tkwin.o
tkwin.o: In function `PLColor_to_XColor':
tkwin.o(.text+0x1a24): multiple definition of `PLColor_to_XColor'
xwin.o(.text+0x3704): first defined here
tkwin.o: In function `PLColor_from_XColor':
tkwin.o(.text+0x1a64): multiple definition of `PLColor_from_XColor'
xwin.o(.text+0x3744): first defined here
tkwin.o: In function `PLX_save_colormap':
tkwin.o(.text+0x1af8): multiple definition of `PLX_save_colormap'
xwin.o(.text+0x37c0): first defined here
/usr/bin/ld: Warning: size of symbol `PLX_save_colormap' changed from 95 to 89 in tkwin.o
collect2: ld returned 1 exit status
make[1]: *** [libplplotd.so.5.1.0] Error 1
make[1]: Leaving directory `/home/software/plplot_cvs/HEAD/plplot_working3/tmp'
make: *** [all] Error 2

Again, these all look like name clashes with definitions in xwin.c
which have to be resolved so the two can peacefully coexist.

Once the two sets of nameclashes are taken care of, I will be happy to try
again with the -I /usr/include/tcl8.3/tk-private/generic/ -DHAVE_LIMITS_H
workaround just to see how far I can get.

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
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