Hi,
I'm trying to build a piece of software that uses MPI. On a current
amd64 OpenBSD system I use the devel/openmpi port for this, but simple
test programs fail to link properly, complaining about the MPI
functions:
#include <mpi.h>
int
main(int argc, char **argv)
{
MPI_Init(&argc, &argv);
MPI_Finalize();
return 0;
}
Compiling this:
$ mpicc mpitest.c
/usr/local/lib/libopen-pal.so.0.0: warning: strcat() is almost always misused,
please use strlcat()
/usr/local/lib/libmpi.so.0.1: warning: strcpy() is almost always misused,
please use strlcpy()
/usr/local/lib/libopen-rte.so.0.0: warning: rand() may return deterministic
values, is that what you want?
/usr/local/lib/libopen-rte.so.0.0: warning: sprintf() is often misused, please
use snprintf()
/usr/local/lib/libopen-pal.so.0.0: warning: vsprintf() is often misused, please
use vsnprintf()
/tmp_mfs/mpitest-e45b73.o: In function `main':
mpitest.c:(.text+0x3d): undefined reference to `MPI_Init'
mpitest.c:(.text+0x45): undefined reference to `MPI_Finalize'
cc: error: linker command failed with exit code 1 (use -v to see invocation)
How do I go about working around this?
I notice that the ordinary MPI functions in libmpi.so.0.1 are marked as
"local" (they have 't' in the nm output), whereas the profiling version
of the functions are not. The profiling functions have a 'P' prefix
(e.g. "PMPI_Init()") and the link properly. Th issue is that I'm trying
to compile a preexisting piece of software and I don't want it to call
the profiling routines.
The devel/openmpi port was built from source, but the same error occurs
with the package version.
--
Andreas Kusalananda Kähäri,
National Bioinformatics Infrastructure Sweden (NBIS),
Uppsala University, Sweden.
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