Re: Backplot issues

[Will Shackleford <shackle-at-cme.nist.gov>]

Paul wrote:

> 
> Hi Will
> 
> Tried the emcplot3d - Not sure what happened, but I got a core dump for my
> efforts. Recompiled the Mesa libs and then emc - Same result.
> 
> This is the first time I've had a core dump from emc....
> 
> Regards, Paul.
> 
> On Mon, 11 Jun 2001, Will Shackleford wrote:
> 
> 
>>To build it you will need either OpenGL or Mesa (which is a free 
>>"OpenGL" workalike). You might already have it.
>>
>  
> 
>>plat/linux_2_2_14/bin/emcplot3d --prog programs/cds.ngc --scale 0.05
>>
> 


Sorry about that. If you feel like doing some debugging,
try this;


script

cd emc
gdb plat/linux_?/bin/emcplot3d

(within gdb)
r --prog <prog> --scale <scale>

(wait for core dump)
bt
info local
l
(if you have the time and know some gdb commands you can try to
get some more information. "p <varname>" prints out the value of 
variables,"help" lists the gdb commands.)
q
(exit gdb)
(press <CNTRL>D to exit from script)

Then you can send me the file typescript which will have a log of the 
debugging session.

emcplot3d is normally compiled with the debug compile flag on. So if the
error occurs directly within emcplot3d gdb should be fairly helpful. 
libc and the Mesa libs are compiled by default without the debug stuff 
so if the error occured within in them, even if it was indirectly the 
result of something emcplot3d did, gdb's output will be considerably 
less helpful. (function names are often just "??", some gdb commands 
won't work)

-- Will



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William Penn Shackleford III			shackle-at-nist.gov
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