Re: [Lapackpp-devel] compile problem on linux

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

Hi,

Am Samstag, 22. April 2006 22:52 schrieb Mateusz Kore=F1:
> /usr/bin/ld: cannot find -llapack.2.0
> collect2: ld returned 1 exit status
>
> The configure script does something like this:
>
> checking if ATLAS should be used... yes
> checking for ATLAS library... /usr/lib (libatlas.so.3.0)
> checking for f77blas library... /usr/lib (libf77blas.so.3.0)
> checking for cblas library... /usr/lib (libcblas.so.3.0)
> checking whether ATLAS is usable... yes
> checking for cheev_... no
> checking for cheev_ in -llapack... no
> checking for cheev_ in -llapack32... no
> checking for cheev_ in -llapack_rs6k... no
> checking for any lapack library... -llapack.2.0
>
> I've got liblapack.so.2.0 in my /usr/lib
>
> My guess is that gcc looks only for lib*.so with -l option and doesn't see
> lib*.so.*

=46or any -lFOO in the gcc-command, the gcc will look for libFOO.so (if I=20
understood gcc correctly). In your case it is probably not correct to have=
=20
=2Dllapack.2.0 anyway -- it should probably rather simply be -llapack.=20

=46irst potential Workaround: After ./configure in lapackpp, edit the file=
=20
src/Makefile, look for the string "-llapack.2.0" and replace it by=20
"-llapack".=20

Second potential Workaround: In /usr/lib, make a symlink with the name=20
"lapack.so" to the existing "lapack.so.2.0".

Thirdly, you should check the output of=20

  /sbin/ldconfig -p | grep lapack

and see under which names the liblapack.so.2.0 is listed.

Regards,

Christian