[Plplot-devel] tkwin build succeeded. Now need a way to test it

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

On Wed, 10 Jul 2002, Vince Darley wrote:

> I'm away from my machine at the moment, but just rename all instances of
> that function in Plplotter_Init.c and you should be ok.

I did this locally, but you probably wouldn't like my name (;-) so please
commit your solution to the nameclash when you have time.

With this change and adding

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

by hand to the plplotter.c compile line, I finally got a good Linux build!

Now on to the executable testing.

I get a segfault if I try

./x01c -dev tkwin

Further debugging with the aid of valgrind showed the following problem
right before the segfault.

#2  0x4029e2c1 in plD_open_tkwin (pls=0x402bb040) at tkwin.c:427
427             tkwd->map = Tk_Colormap(pls->plPlotterPtr->tkwin);
(gdb) p pls->plPlotterPtr
$1 = (struct PlPlotter *) 0x0
(gdb) p pls->plPlotterPtr->tkwin
Cannot access memory at address 0x0

However, further reading of your code comments indicates this driver is only
supposed to work in a tk environment so I guess I deserved what I got....;-)

So two quick questions/comments:

(1) Please put in a quick test in tkwin.c that you *are* in a tk environment
so you get an error message and smooth exit (rather than segfault) when you
try this outside tk, e.g., with x01c.

(2) How do I test the tkwin driver in a tk environment?  (Complete cookbook
please since I have very little knowledge of tcl/tk).

Alan