[Debichem-devel] Bug#1075979: [Help] molds: FTBFS with mpich as default MPI provider: /usr/bin/ld: cannot find -lmpi_cxx: No such file or directory

[Bill Allombert]

Le Thu, Nov 07, 2024 at 08:12:22PM +0100, Andreas Tille a écrit :
> Control: tags -1 help
> Thanks
> 
> Hi,
> 
> today molds (from Debichem team) came up as candidate for the Bug of the
> Day[1].  I considered bug #1075979 easy to fix by simply adding
> libopenmpi-dev to Build-Depends since
> 
> $ apt-file search libmpi_cxx.so | grep -- -dev
> libopenmpi-dev: /usr/lib/x86_64-linux-gnu/libmpi_cxx.so
> libopenmpi-dev: /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so
> 
> but this is obviously not the case for the 5.x series of libopenmpi-dev
> which does not contain this library any more.  Any hints for
> replacements or other ways to make the linker happy are welcome since
> the problem remains.

Andreas,

debian/rules carries the line
export LIBSBASE=-lstdc++ -lm -lpthread -lgomp -L/usr/lib/lapack/ -llapacke -lmpi -lmpi_cxx
I am pretty sure this is wrong, mpicxx should take care of -lstdc++ -lmpi -lmpi_cxx

I checked and the package build fine without -lstdc++ -lmpi -lmpi_cxx

I do not know what LIBSBASE means.

Cheers,
-- 
Bill. <ballombe at debian.org>

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