octave segfaulting

[Christoph Ellenberger]

Hi,
I just tried to freshly build  the latest development version of octave. After 
not finding some headers for fltk (thanks Shai) am I now facing a different 
problem. As soon as I try to start ./run-octave it segfaults (which already 
happens in the make process during documentation processing). But I can't 
find any octave-core and also trying gdb ./run-octave only tells me that this 
file isnt in a executable format. My build environment is a Gentoo Linux, gcc 
4.1.2, autoconf 2.63...

So my question is how can I debug this issue, and what information (and where 
can I find/produce it) is needed that this is going to be a useful bug 
report ?

Thanks in advance
Christoph