On 05/04/2017 09:08 PM, gil...@rist.or.jp wrote:
William,
the link error clearly shows libcaffe.so does require C++ bindings.
did you build caffe from a fresh tree ?
what if you
ldd libcaffe.so
nm libcaffe.so | grep -i ompi
if libcaffe.so does require mpi c++ bindings, it should depend on it
(otherwise the way it was built is questionnable)
you might want to link with mpic++ instead of g++
This is a great point I missed in my previous e-mail on this topic. When
compiling a program that uses MPI, you want to specify the MPI compiler
wrappers for your C, C++ and Fortran Compilers, and not your chosen
compiler directly, For example:
./configure --prefix=/usr/local/foo-1.2.3 CC=mpicc CXX=mpicxx FC=mpif90
or something similar. This guarantees that the actual compiler is
called with all the write flags for the C preprocessor, linker, etc.
This will almost always prevent those linking errors.
note mpi C++ bindings are no more built by default since v2.0, so you
likely have to
configure --enable-mpi-cxx
last but not least, make sure caffe and openmpi were built with the
same c++ compiler
Cheers,
Gilles
----- Original Message -----
I know this could possibly be off-topic, but the errors are
OpenMPI errors and if anyone could shed light on the nature of
these errors I figure it would be this group:
CXX/LD -o .build_release/tools/upgrade_solver_proto_text.bin
g++ .build_release/tools/upgrade_solver_proto_text.o -o
.build_release/tools/upgrade_solver_proto_text.bin -pthread
-fPIC -DCAFFE_VERSION=1.0.0-rc5 -DNDEBUG -O2 -DUSE_OPENCV
-DUSE_LEVELDB -DUSE_LMDB -DCPU_ONLY -DWITH_PYTHON_LAYER
-I/hpc/apps/python27/include/python2.7
-I/hpc/apps/python27/externals/numpy/1.9.2/lib/python2.7/site-packages/numpy/core/include
-I/usr/local/include -I/hpc/apps/hdf5/1.8.17/include
-I.build_release/src -I./src -I./include
-I/hpc/apps/atlas/3.10.2/include -Wall -Wno-sign-compare
-lcaffe -L/hpc/apps/gflags/lib -L/hpc/apps/python27/lib
-L/hpc/apps/python27/lib/python2.7
-L/hpc/apps/atlas/3.10.2/lib -L.build_release/lib-lglog
-lgflags -lprotobuf -lboost_system -lboost_filesystem -lm
-lhdf5_hl -lhdf5 -lleveldb -lsnappy -llmdb -lopencv_core
-lopencv_highgui -lopencv_imgproc -lboost_thread -lstdc++
-lboost_python -lpython2.7 -lcblas -latlas \
-Wl,-rpath,\$ORIGIN/../lib
.build_release/lib/libcaffe.so: undefined reference to
`ompi_mpi_cxx_op_intercept'
.build_release/lib/libcaffe.so: undefined reference to
`MPI::Datatype::Free()'
.build_release/lib/libcaffe.so: undefined reference to
`MPI::Comm::Comm()'
.build_release/lib/libcaffe.so: undefined reference to
`MPI::Win::Free()'
collect2: error: ld returned 1 exit status
I've read this may be due to a dependency of Caffe that uses
OpenMPI (since I've been told Caffe itself doesn't use OpenMPI).
Would adding -l directives to LIBRARIES line in the Makefile for
Caffe that reference all OpenMPI libraries fix this problem?
For example, -l mpi.
Thank you in advance. Hopefully this isn't entirely OT.
William L.
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