Re: Known segmentation fault with new build

[David Bateman]

Alexander Barth wrote:

> Bob Fletcher wrote:
>
>>On Mon, 2006-07-10 at 16:26 -0400, Alexander Barth wrote:
>>  
>>
>>>It seems that you have the experimental libstdc++.so.7 installed. 
>>>Perhaps some part of the octave use the (stable) libstdc++.so.6.0.8 and 
>>>some use the experimental library. You can try to remove the 
>>>experimental library with:
>>>
>>>rpm -e libstdc++so7
>>>
>>>and recompile octave. Since you are new to Linux, you find it probably 
>>>easier to install the pre-compiled octave package included in Fedora extras:
>>>    
>>>
>>
>>Alex,
>>
>>Thanks for your suggestion.
>>I removed the libstdc++so7 package and then started all over with a
>>fresh un-tarred directory, executing
>>      ./configure
>>      make
>>      make check
>>Unfortunately, I again had the same problem, with the output as shown:
>>
>>  src/DLD-FUNCTIONS/cellfun.cc ........................... PASS    2/2
>>  src/DLD-FUNCTIONS/conv2.cc ............................. PASS    1/1
>>  src/DLD-FUNCTIONS/dispatch.cc .......................... PASS   13/13
>>  src/DLD-FUNCTIONS/luinc.cc .............................panic:
>>Segmentation fault -- stopping myself...
>>make[2]: *** [check] Segmentation fault
>>make[2]: Leaving directory `/home/bob/downloads/octave-2.9.6/test'
>>make[1]: *** [check] Error 2
>>make[1]: Leaving directory `/home/bob/downloads/octave-2.9.6'
>>make: *** [check] Error 2
>>
>>I am not sure what is going on; I have not had this problem with other
>>builds. (Notice that I did the 'make check' before doing a 'make
>>install'. I assume this is OK since I did not want to mess up my working
>>version of Octave.)
>>
>>  
>>
>>>Fedora includes currently octave version 2.9.5.
>>>    
>>>
>>
>>Yes, I know. I have been experimenting with it, but I really wanted to
>>complete a successful build - just to make sure I know I am doing.
>>Apparently, I do NOT know what I am doing, so I guess I will just have
>>to move on to other things.
>>
>>Thanks very much for your help. If you do have any other suggestions, I
>>would certainly welcome them.
>>
>>Bob
>>
>>
>>  
>>
> Bob,
> Please keep the discussion on octave-help mailing list.
>
> I'm also using octave-2.9.6 on FC5 (but x86_64 not i386). I didn't run
> "make check" when I installed octave-2.9.6, but now after a "make
> check" I'm seeing the error in luinc.cc that you described as well. It
> seems to be related to the fact that UMFPACK is not installed:
>
> octave:1> a=sparse([1,2,0,0;0,1,2,0;1e-14,0,3,0;0,0,0,1]);
> octave:2> [l,u]=luinc(a,1e-10);
> error: UMFPACK not installed
> panic: Segmentation fault -- stopping myself...
> attempting to save variables to `octave-core'...
> save to `octave-core' complete
> Segmentation fault (core dumped)
>
> Probably luinc should only be compiled if UMFPACK is installed. I
> copied David ( author of luinc.cc) in Cc to see what he thinks.
>
> Alex
>
This shouldn't crash though.. I'll take a look at it later...

D.

-- 
David Bateman                                address@hidden
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