Re: [Lapackpp-devel] undefined reference problem

[Andrew O. <end...@gm...>]

Hey

I added -lblas -lg2c and -llapack to the linker flags and my errors
have been reduced to this:

/usr/local/apps/intel/compiler8/lib/libimf.so.6: warning: log2l is not
implemented and will always fail
/usr/local/apps/intel/compiler8/lib/libimf.so.6: warning: exp2l is not
implemented and will always fail
/usr/lib/liblapack.so: undefined reference to `f_cpstr'
/usr/lib/libblas.so: undefined reference to `f_iob'
/usr/lib/liblapack.so: undefined reference to `f_cpystr'
/usr/lib/liblapack.so: undefined reference to `f_concat'
/usr/lib/libblas.so: undefined reference to `f_stop'

Is there anyway I can find out which linker flags I need to add so
that the undefined references go away? I'm really sorry but I don't
know how to use automake, autoconfig or libtool... I guess I should
start reading up on tutorials =[.

This is specs for machine I am trying to build on

http://www.sdsc.edu/user_services/ia64/tech-summary.html

Andy

On 5/23/06, Christian Stimming <sti...@tu...> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Your commands look fine, but they will work only in the simple case. You
> specify "-llapackpp" on the gcc line so that your test.cc links against
> liblapackpp.so. Obviously liblapackpp.so needs to link against more
> libraries, which is why liblapack.so (without the pp) is linked in. This
> one in turn needs to link against yet more libraries - on my system it
> requires -lblas and -lg2c; maybe you should add these arguments to gcc
> as well.
>
> I don't specify the gcc line directly in my programs; instead, I let
> libtool/automake generate that for me, and this will usually find the
> appropriate linker flags automatically from the lib*.la files. In your
> case the problem only is that some linker flags are missing but which
> are required for your liblapack.so library.
>
> BTW for future bugreports please remember to specify your compiler
> version number and your OS (linux? bsd? amd64?).
>
> Christian
>
> Andrew Oh schrieb:
> > Hey
> >
> >
> > I tried compiling a simple "hello world" program and I get these errors:
> >
> >
> > tg-login1 /users/aoh> g++ test.cc -I/usr/local/apps/mpich-gm/include
> > -L/usr/local/apps/mpich-gm/lib -lmpich
> > -I/usr/local/apps/lapackpp-2.4.8/include/lapackpp
> > -L/usr/local/apps/lapackpp-2.4.8/lib -llapackpp
> > -I/users/aoh/random/include
> >
> > In file included from /usr/include/g++/backward/iostream.h:31,
> >                 from test.cc:7:
> > /usr/include/g++/backward/backward_warning.h:32:2: warning: #warning
> > This file includes at least one deprecated or antiquated header.
> > Please consider using one of the 32 headers found in section 17.4.1.2
> > of the C++ standard. Examples include substituting the <X> header for
> > the <X.h> header for C++ includes, or <sstream> instead of the
> > deprecated header <strstream.h>. To disable this warning use
> > -Wno-deprecated.
> > /usr/local/apps/intel/compiler8/lib/libimf.so.6: warning: log2l is not
> > implemented and will always fail
> > /usr/local/apps/intel/compiler8/lib/libimf.so.6: warning: exp2l is not
> > implemented and will always fail
> > /usr/local/apps/intel/compiler8/lib/libcxa.so.6: undefined reference
> > to `__ashldi3'
> > /usr/lib/liblapack.so.3: undefined reference to `z_abs'
> > /usr/lib/liblapack.so.3: undefined reference to `c_sqrt'
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.2.1 (MingW32)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
>
> iQCVAwUBRHLDW2XAi+BfhivFAQLRhgQAt9hcEG7eT8bTtiJy/RscjmPlf4suQ52n
> NAkaUD6aE5x/PruIPx6hzPl1Tq4tu7mQNUeZDqGiJmWbp+xly1AuOQhlmxJvwyKy
> 06vU5dlPdNEA0nUfIE5EhvnQDwnz4B2Mm/TNVdBpE9Wcm6aGrm5OuwtqEhEr7GJq
> Jgja/OoVlYg=
> =e7P6
> -----END PGP SIGNATURE-----
>