Compilation error

[Pedro Rodrigues]

Hello

I am trying to build the library with your candi script but I got an error, apparently with a missing function from Trilinos library:

[ 75%] Linking CXX executable ../bin/step-1.debug
/usr/bin/ld: /root/dealii-candi/trilinos-release-13-2-0/lib/libepetra.so: undefined reference to `dggsvd_'
/usr/bin/ld: /root/dealii-candi/trilinos-release-13-2-0/lib/libepetra.so: undefined reference to `sggsvd_'
collect2: error: ld returned 1 exit status
make[2]: *** [examples/CMakeFiles/step-1.debug.dir/build.make:249: bin/step-1.debug] Error 1
make[1]: *** [CMakeFiles/Makefile2:3998: examples/CMakeFiles/step-1.debug.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
Failure with exit status: 2
Exit message: There was a problem building dealii v9.4.0.

can you help?

thanks in advance

Pedro R.

[Wolfgang Bangerth]

On 11/26/22 07:33, Pedro Rodrigues wrote:
>
> I am trying to build the library with your candi script but I got an error,
> apparently with a missing function from Trilinos library:
>
> [ 75%] Linking CXX executable ../bin/step-1.debug
> /usr/bin/ld: /root/dealii-candi/trilinos-release-13-2-0/lib/libepetra.so:
> undefined reference to `dggsvd_'
> /usr/bin/ld: /root/dealii-candi/trilinos-release-13-2-0/lib/libepetra.so:
> undefined reference to `sggsvd_'
> collect2: error: ld returned 1 exit status
> make[2]: *** [examples/CMakeFiles/step-1.debug.dir/build.make:249:
> bin/step-1.debug] Error 1
> make[1]: *** [CMakeFiles/Makefile2:3998:
> examples/CMakeFiles/step-1.debug.dir/all] Error 2
> make: *** [Makefile:136: all] Error 2

Pedro,
the missing functions are part of BLAS. It is a bug in Trilinos that it does
not make sure the BLAS library appears on the linker line, but I don't know
how to fix this. What kind of system are you on? Can you just install deal.II
from an existing package?

Best
W.

--
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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[Pedro Rodrigues]

Hello

I think I have solved the problem. I had a custom lapack installation in /usr/local/lib and Trilinos was picking that one instead of the version from *candi* at /usr/lib. After removing the first one I was able to build the library with *candi*. I noticed too many warnings related to casting from *void*. I hope that it doesn't create execution problems.

Another problem I have  found was related to *mpiexec*. It sends a warning about running as *root* and does not run. I had to add  two *export* lines in *.bashrc* to bypass it.

My system is UbuntuLTS 22.04 running in VBox.  

thanks for your quick reply

regards

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atenciosamente,

Pedro Rodrigues