Hello,
copied from a working MPI CMakeLists.txt:
find_package(MPI REQUIRED)
include_directories(${MPI_INCLUDE_PATH})
set(COMPILE_FLAGS ${COMPILE_FLAGS} ${MPI_COMPILE_FLAGS})
set(LINK_FLAGS ${LINK_FLAGS} ${MPI_LINK_FLAGS})
add_executable(StructureSolverParallel
"StructureSolver_Parallel/structureDataDisplay.cpp"
"StructureSolver_Parallel/StructureSolver.cpp"
"StructureSolver_Parallel/structureComputeSolution.cpp")
target_link_libraries(StructureSolverParallel PUBLIC ${PRECICE_LIBRARY})
target_link_libraries(StructureSolverParallel PUBLIC ${MPI_LBRARIES})
configuration runs smooth:
% cmake -DMPI_CXX_COMPILER=/opt/mpich/bin/mpicxx
-DMPI_C_COMPILER=/opt/mpich/bin/mpicc . && make
-- The CXX compiler identification is GNU 8.2.0
[...]
-- Found MPI_CXX: /opt/mpich/lib/libmpicxx.so (found version "3.1")
-- Found MPI: TRUE (found version "3.1")
make however:
[ 69%] Linking CXX executable StructureSolverParallel
/usr/bin/cmake -E cmake_link_script
CMakeFiles/StructureSolverParallel.dir/link.txt --verbose=1
/usr/bin/c++ -Wall -Wextra -Wno-unused-parameter -g
CMakeFiles/StructureSolverParallel.dir/StructureSolver_Parallel/structureDataDisplay.cpp.o
CMakeFiles/StructureSolverParallel.dir/StructureSolver_Parallel/StructureSolver.cpp.o
CMakeFiles/StructureSolverParallel.dir/StructureSolver_Parallel/structureComputeSolution.cpp.o
-o StructureSolverParallel /home/lindnefn/precice/build/last/libprecice.so
/usr/bin/ld:
CMakeFiles/StructureSolverParallel.dir/StructureSolver_Parallel/StructureSolver.cpp.o:
undefined reference to symbol 'MPI_Init'
/usr/bin/ld: /opt/mpich/lib/libmpi.so.12: error adding symbols: DSO missing
from command line
when I just take the last command line and -lmpi to it, it works.
What could be missing there in CMakeLists?
Thanks,
Florian
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