Re: How to build?

[edgar]

On 2021-04-13 20:03, edgar wrote:
> Hello.
>
> I would like to know if somebody can help me, please. I got to the
> part of compiling, but running the tests throws an error which I
> haven't been able to figure out. Let me know the information that you
> need. Below is the last part of what `make check' tells me. Thanks.
>
>      CXXLD    dynamic_tas
>     /usr/bin/ld: /usr/lib64/libsmumps.so: undefined reference to
> `mumps_sol_get_npiv_liell_ipos_'
>  ... removed content ...

After some days, I think I'm getting closer. The Makefile for tests uses 
libtool, and I was able to link with mpicxx alone with the addition of 
-shared. The expanded  command from the Makefile for the dynamic_tas 
target is:

    /bin/sh ../libtool  --tag=CXX   --mode=link /usr/bin/mpicxx  -fPIC 
-fopenmp -O3 -march=amdfam10 -mtune=generic -O2 -D_FORTIFY_SOURCE=2 -O3 
-std=c++14  -L/usr/lib -L/usr/lib/openmpi 
-L/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0 
-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -o dynamic_tas 
dynamic_tas.o ../src/libgetfem.la -lm  -lsmumps -ldmumps -lcmumps 
-lzmumps -lqhull -llapack -lmpi_cxx -Wl,-rpath -Wl,/usr/lib -Wl,-rpath 
-Wl,/usr/lib/openmpi -Wl,-rpath 
-Wl,/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0  -lmpi -lpthread  -lmetis  
-lsuperlu  -lesmumps -lptscotch -lptscotcherr -lscotch -lscotcherr  
-lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord   -lblas 
-lmetis

(I added some libraries by means of the LIBS environment variable [1]). 
By replacing that with this:

    /usr/bin/mpicxx -shared -fPIC -fopenmp -O3 -march=amdfam10 
-mtune=generic -O2 -D_FORTIFY_SOURCE=2 -O3 -std=c++14 -Wl,-O1 
-Wl,--sort-common -Wl,--as-needed -Wl,-z -Wl,relro -Wl,-z -Wl,now -o 
dynamic_tas dynamic_tas.o -Wl,-rpath -Wl,/usr/lib -Wl,-rpath 
-Wl,/usr/lib/openmpi -Wl,-rpath 
-Wl,/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0  -L/usr/lib 
-L/usr/lib/openmpi -L/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0 
-Wl,--enable-new-dtags -lmpi_cxx ../src/.libs/libgetfem.so -lm -lqhull 
-llapack -lmpi_cxx -lmpi -lpthread -lsuperlu -lesmumps -lptscotch 
-lptscotcherr -lscotch -lscotcherr -lcmumps -ldmumps -lsmumps -lzmumps 
-lmumps_common -lpord -lblas -lmetis

, dynamic_tas was successfully created. I will now try and see if I can 
apply the same logic to other targets (of the tests/Makefile)

Aaaaand that's the penguin!

References:
[1] 
https://lists.nongnu.org/archive/html/getfem-users/2017-01/msg00011.html

Acknowledgements
[2] Linking: undefined reference to: 
https://riptutorial.com/c/example/12342/undefined-reference-errors-when-linking
[3] Use ldd to check for statically linked libraries: 
https://github.com/JuliaSmoothOptimizers/MUMPS.jl/issues/34#issuecomment-466133965
[4] Use shared libraries: https://stackoverflow.com/a/24492288