eigs and ARPACK

[Thomas Weber]

On Sat, Jan 03, 2009 at 08:39:54PM +0100, Thomas Treichl wrote:
> At the moment I still have the problem that linking of liboctave.dylib 
> fails because of undefined symbols:
>
>   ld: Undefined symbols:
>   _dnaupd_
>   _dneupd_
>   _dsaupd_
>   _dseupd_
>   _znaupd_
>   _zneupd_
>   /usr/libexec/gcc/i686-apple-darwin8/4.0.1/libtool:
>     internal link edit command failed
>
> that's why I added "$(ARPACK_LIBS)" to "LINK_DEPS" of "Makefile.in" in 
> the directory of liboctave. I cheated, and also compiled the latest 
> Octave sources on my virtual Debian GNU/Linux box. That system doesn't 
> need to know anything about $(ARPACK_LIBS) for liboctave.so but just 
> compiles fine without that information - can you help me to understand 
> where GNU/Linux gets it's information about these functions from? 

ld checks /usr/lib (and some other paths) by default. How did you
install arpack on Debian?

	Thomas