Re: [Gzz] Tuukkah's generator problem

[Tuukka Hastrup]

On Mon, 7 Apr 2003, Tuomas Lukka wrote:
> [23:05:46] <tuukkah> libvob/src/jni$ ./Generator
> [23:05:46] <tuukkah>         IrregularQuad
> [23:05:46] <tuukkah> Virheellinen k?sky
> [23:06:20] <tuukkah> "Virheellinen käsky" = Illegal instruction
> [23:09:00] <tuukkah> (although "virheellinen" = flawed, and "käsky" = order)
> [23:12:02] <tuukkah> and "make clean" doesn't even remove it
> [23:13:57] <tuukkah> it was compiled into same form again :-(

I extended "make clean" so it removes Generator now, plus some other 
generated files there was left.

> Umm, it has to be run from libvob/, not libvob/src/jni, as you can
> see from the Makefile. 

The point was that there should never come "Illegal instruction", and as I 
had said before, it seems I get the same signal even when it's run 
properly from the Makefile.

> And since there's debugging info you *could* of course have run gdb and
> gotten us a stack trace...

Now that you suggested it, yes:

=0 address@hidden:~/cvs/Fenfire/libvob$ gdb src/jni/Generator
GNU gdb 5.3-debian
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...
(gdb) run
Starting program: /home/tuukka/cvs/Fenfire/libvob/src/jni/Generator
[New Thread 16384 (LWP 1970)]
        IrregularQuad
 
Program received signal SIGILL, Illegal instruction.
[Switching to Thread 16384 (LWP 1970)]
__static_initialization_and_destruction_0 (__initialize_p=-1073743768,
    __priority=-1073743728) at ../../include/vob/vobs/Irregu.hxx:46
46              freq = 1.0 / ripple_period;
(gdb) bt
#0  __static_initialization_and_destruction_0 (__initialize_p=-1073743768,
    __priority=-1073743728) at ../../include/vob/vobs/Irregu.hxx:46
#1  0x080705fb in 
_GLOBAL__I__ZNSs15_M_replace_safeIPKcEERSsN9__gnu_cxx17__normal_iteratorIPcSsEES6_T_S7_Generator.cxxl87bjb
 ()
    at /usr/include/c++/3.2/bits/locale_facets.h:111
#2  0x08058f4d in _init ()
#3  0x40613a1f in __libc_start_main () from /lib/libc.so.6
(gdb)

Does that say anything to you?

> [23:22:37] <tuukkah> ridiculous idea: stop coding for one week, just write 
> documentation
> 
> What documentation would have helped the current problem? If you tell me
> what you'd like to read, I'll write it.

If "the current problem" is taken as my tries to compile everything, we 
could start with a README in every subproject, stating at least the 
obvious dependencies.

> There's no point in saying just "write some documentation"; documentation
> written from that starting point will have no focus and no flow.

The point was that at this point, any documentation would be beneficial 
:-) There are common ideas about the minimum level of documentation, which 
we certainly don't match yet. 

Further, I don't believe in someone telling what everybody should do, 
like "If you tell me what you'd like to read, I'll write it." How should I 
be able to enumerate everything?

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