lapackpp-devel

[Lapackpp-devel] undefined reference problem

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

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'
/usr/lib/liblapack.so.3: undefined reference to `f_cpstr'
/usr/lib/liblapack.so.3: undefined reference to `f_iob'
/usr/lib/liblapack.so.3: undefined reference to `f_cpystr'
/usr/lib/liblapack.so.3: undefined reference to `f_concat'
/usr/lib/liblapack.so.3: undefined reference to `f_stop'
/usr/lib/liblapack.so.3: undefined reference to `z_exp'
/usr/local/apps/intel/compiler8/lib/libcxa.so.6: undefined reference
to `__ashrdi3'
/usr/lib/liblapack.so.3: undefined reference to `c_exp'
/usr/lib/liblapack.so.3: undefined reference to `z_sqrt'
/usr/lib/liblapack.so.3: undefined reference to `c_abs'
/usr/local/apps/intel/compiler8/lib/libcxa.so.6: undefined reference
to `__muldi3'
collect2: ld returned 1 exit status

---

I attached the simple program. All I do is include some lapack++
header files. Thanks for your help!!

Andy

Re: [Lapackpp-devel] undefined reference problem

[Christian S. <sti...@tu...>]

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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'
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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'
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Re: [Lapackpp-devel] undefined reference problem

[Christian S. <sti...@tu...>]

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Hash: SHA1

Hi,

Andrew Oh schrieb:
> 
> 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
^^^^ those can be ignored

> /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 =[.

Sigh... obviously you also need to link against some fortran library,
but I can't tell the name as this depends on your system. Hm... have you
been able to compile the lapackpp tarball completely? Can you also run
"make check" in the tarball? The command "make check" will compile
several executables, e. g. in the testing/ directory. During "make
check", you can look at the commands and see which additional linker
flags are being used. Or in the file ./config.status, look for the line
that contains @FLIBS@ and this should tell you the library flags as well.

Christian

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