Edit Question - KnowledgeHub

Title Body

Here is a simple MPI "Hello, World!" program. #include <stdio.h> #include <mpi.h> int main(int argc, char **argv) { int size, rank; MPI_Init(&argc, &argv); MPI_Comm_size(MPI_COMM_WORLD, &size); MPI_Comm_rank(MPI_COMM_WORLD, &rank); printf("SIZE = %d RANK = %d\n",size,rank); MPI_Finalize(); return(0); } However, it doesn't seem to compile: Undefined first referenced symbol in file MPI::Datatype::Free() /var/tmp//ccE6aG2w.o MPI::Win::Free() /var/tmp//ccE6aG2w.o MPI::Comm::Comm() /var/tmp//ccE6aG2w.o ld: fatal: symbol referencing errors. No output written to main collect2: ld returned 1 exit status I've googled a lot, viewed mailing lists, thousands of them. They say libmpi_cxx is not linking. But it's in the compiler flags. Here is --showme data: mpic++ --showme:compile -I/usr/openmpi/ompi-1.5/include -I/usr/openmpi/ompi-1.5/include/openmpi mpic++ --showme:link -R/opt/mx/lib -R/usr/openmpi/ompi-1.5/lib -L/usr/openmpi/ompi-1.5/lib -lmpi -lopen-rte -lopen-pal -lnsl -lrt -lm -ldl -lsocket -lmpi_cxx My compiler is g++.

Tags (comma-separated) Cancel