On Sun, Jan 13, 2019 at 04:37:23PM +0100, Thomas L. wrote: > Hi, > > I tried compiling a MPI example program > (https://raw.githubusercontent.com/wesleykendall/mpitutorial/gh-pages/tutorials/mpi-hello-world/code/mpi_hello_world.c) > with openmpi on -current and it fails linking: > $ mpicc -v Downloads/mpi_hello_world.c > OpenBSD clang version 6.0.0 (tags/RELEASE_600/final) (based on LLVM 6.0.0) > Target: amd64-unknown-openbsd6.4 > Thread model: posix > InstalledDir: /usr/bin > "/usr/bin/cc" -cc1 -triple amd64-unknown-openbsd6.4 -emit-obj -mrelax-all > -disable-free -disable-llvm-verifier -discard-value-names -main-file-name > mpi_hello_world.c -mrelocation-model pic -pic-level 1 -pic-is-pie > -mthread-model posix -mdisable-fp-elim -relaxed-aliasing -masm-verbose > -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info > -debugger-tuning=gdb -v -resource-dir /usr/lib/clang/6.0.0 -I > /usr/local/include -fdebug-compilation-dir /home/tom -ferror-limit 19 > -fmessage-length 224 -femulated-tls -fwrapv -pthread -stack-protector 2 > -D_RET_PROTECTOR -ret-protector -fobjc-runtime=gnustep > -fdiagnostics-show-option -fno-builtin-malloc -fno-builtin-calloc > -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free > -fno-builtin-strdup -fno-builtin-strndup -o /tmp/mpi_hello_world-a9e376.o -x > c Downloads/mpi_hello_world.c > clang -cc1 version 6.0.0 based upon LLVM 6.0.0 default target > amd64-unknown-openbsd6.4 > #include "..." search starts here: > #include <...> search starts here: > /usr/local/include > /usr/lib/clang/6.0.0/include > /usr/include > End of search list. > "/usr/bin/ld" -e __start --eh-frame-hdr -Bdynamic -dynamic-linker > /usr/libexec/ld.so -o a.out /usr/bin/../lib/crt0.o /usr/bin/../lib/crtbegin.o > -L/usr/local/lib -L/usr/bin/../lib -L/usr/lib /tmp/mpi_hello_world-a9e376.o > -lmpi -lopen-rte -lopen-pal -E -lutil -lm -lcompiler_rt -lpthread -lc > -lcompiler_rt /usr/bin/../lib/crtend.o > /usr/bin/ld: error: undefined symbol: MPI_Init > >>> referenced by mpi_hello_world.c > >>> /tmp/mpi_hello_world-a9e376.o:(main) > > /usr/bin/ld: error: undefined symbol: MPI_Comm_size > >>> referenced by mpi_hello_world.c > >>> /tmp/mpi_hello_world-a9e376.o:(main) > > /usr/bin/ld: error: undefined symbol: MPI_Comm_rank > >>> referenced by mpi_hello_world.c > >>> /tmp/mpi_hello_world-a9e376.o:(main) > > /usr/bin/ld: error: undefined symbol: MPI_Get_processor_name > >>> referenced by mpi_hello_world.c > >>> /tmp/mpi_hello_world-a9e376.o:(main) > > /usr/bin/ld: error: undefined symbol: MPI_Finalize > >>> referenced by mpi_hello_world.c > >>> /tmp/mpi_hello_world-a9e376.o:(main) > cc: error: linker command failed with exit code 1 (use -v to see invocation) > > The reason seems to be, that the relevant symbols in libmpi.so.0.1 are local: > $ nm /usr/local/lib/libmpi.so.0.1 | grep MPI_Init > 00070330 t MPI_Init > 000704f0 t MPI_Init_thread > 000706b0 t MPI_Initialized > 00070330 T PMPI_Init > 000704f0 T PMPI_Init_thread > 000706b0 T PMPI_Initialized > > Unfortunately, I have no idea why this happens. > > Kind regards, > > Thomas
Yes, I also noticed this in June last year [1]. Only the profiling version of each API function is non-local. Unfortunately, I was in a hurry to get something working so I simply moved my development and testing to another operating system rather than digging into why this was so. I might try to look into this later if time permits. [1] https://marc.info/?l=openbsd-ports&m=152929789302360&w=2 Regards, -- Andreas Kusalananda Kähäri, National Bioinformatics Infrastructure Sweden (NBIS), Uppsala University, Sweden.
