Dynamic Extension & Bus error

[Daniel Eggert]

On Apr 22, 2009, at 10:31 AM, Thomas Treichl wrote:

> Daniel Eggert schrieb:
>> I'm trying to create my own dynamic extension, but it won't run:
>> > sushi
>> panic: Bus error -- stopping myself...
>> The code looks like:
>> #include <octave/oct.h>
>> DEFUN_DLD(sushi,
>> 		  args,
>> 		  nargout,
>> 		  "[...] = sushi (...)\n")
>> {
>> 	return octave_value(1);
>> }
>> The back trace looks like this:
>> 0   liboctave.dylib               	0x01afafc6   
>> Array<std::basic_string<char, std::char_traits<char>,   
>> std::allocator<char> > >::operator=(Array<std::basic_string<char,   
>> std::char_traits<char>, std::allocator<char> > > const&) + 38
>> 1   liboctinterp.dylib            	0x00f4ad9c   
>> octave_builtin::do_multi_index_op(int, octave_value_list const&) +  
>> 284
>> 2   liboctinterp.dylib            	0x00f337d9   
>> octave_value::do_multi_index_op(int, octave_value_list const&) + 41
>> 3   liboctinterp.dylib            	0x0106f071   
>> tree_identifier::rvalue(int) + 1409
>> 4   liboctinterp.dylib            	0x010933c7  tree_statement::eval 
>> (bool, int, bool) + 343
>> 5   liboctinterp.dylib            	0x01093770   
>> tree_statement_list::eval(bool, int) + 176
>> 6   liboctinterp.dylib            	0x00e9ecb3 main_loop() + 163
>> 7   liboctinterp.dylib            	0x00e41f71 octave_main + 3361
>> 8   octave-3.0.5                  	0x00004d80 main + 32
>> 9   octave-3.0.5                  	0x000046e2 _start + 216
>> 10  octave-3.0.5                  	0x00004609 start + 41
>> Any thoughts?
>
> I think that you need to provide some more information about what  
> you are doing, which OSX and hardware platform you are using, where  
> you got your Octave from, etc. Try calling "bug_report" in Octave to  
> see what else is very useful for us. All this because I cannot  
> reproduce the problem with my 3.0.5 binary:
>
>  $ ~/bin/Octave.app.3.0.5/Octave.app/Contents/Resources/bin/ 
> mkoctfile sushi.cc
>  $ ~/bin/Octave.app.3.0.5/Octave.app/Contents/Resources/bin/octave -q
>  octave-3.0.5:1> sushi
>  ans =  1
>
> Best regards,
>
>  Thomas

Ok. I wasn't compiling with mkoctfile, because I need to link to other  
things, and mkoctfile is not flexible enough for that. So I was  
querying "mkoctfile -p" for the flags and then compiling from within  
Xcode.

I can't figure out why I get a bug error this way, though.

/Daniel