Hi, I’m not an expert but maybe I can help anyway.
I think that setting CMAKE_FORTRAN_COMPILER might be failing because it should be CMAKE_Fortran_COMPILER (case sensitive). However, I am not sure that it is the best way to handle MPI code. I think that it might be better to use the MPI package which interrogates the system mpi wrappers (mpif90 etc.) and then uses the flags that it finds with the normal compiler (e.g. gfortran). Here is what works for me: find_package(MPI REQUIRED) … include_directories(${MPI_Fortran_INCLUDE_PATH}) … target_link_libraries(MIFF ${MPI_Fortran_LIBRARIES}) Kind regards, Jim Jim Eliot High Performance Computing Group AWE, Aldermaston, Reading, RG7 4PR From: CMake [mailto:cmake-boun...@cmake.org] On Behalf Of Rand Huso Sent: 17 March 2016 21:46 To: cmake@cmake.org Subject: EXTERNAL: [CMake] Difficulty making MPI and OpenMP Fortran shared library with CMake I would like to use CMake for a personal project instead of make (which does work), but I can't seem to get CMake to work the way I think it should. The command "cmake ." runs fine, but the make produces this: Scanning dependencies of target MIFF Linking Fortran shared library libMIFF.so gfortran: fatal error: no input files; unwilling to write output files compilation terminated. make[2]: *** [src/libMIFF.so] Error 4 make[1]: *** [src/CMakeFiles/MIFF.dir/all] Error 2 make: *** [all] Error 2 This surprises me because I don't think I should see "gfortran" - I expected to see "mpif90". And that particular message seems to happen when there are insufficient arguments to "gfortran". (the wrapper "mpif90" is configured to use "gfortran", but all compilation should use the "mpif90" - which doesn't appear to be the case when looking through the generated makefiles.) Here's what my project looks like: Directory structure: MIFF - src/ - - CMakeLists.txt - - MIFFTest.f08 - - MIFFTestMessage.f08 - - MpiIocBaseMessage.f08 - - MpiIocControlMessage.f08 - - MpiIocFramework.f08 - - MpiIocLinkedListItem.f08 - CMakeLists.txt My system is: Ubuntu 14.04.4 LTS The mpif90 compiler is: GNU Fortran (Ubuntu 4.8.4-2ubuntu1~14.04.1) 4.8.4 CMake reports: cmake version 2.8.12.2 Hopefully this is already fixed in newer versions of cmake - but this is the version currently installed - but that's difficult for me to test, as I'm working on a system that shouldn't deviate too far from our standard development platform. The CMakeLists.txt file in the MIFF directory is: cmake_minimum_required (VERSION 2.8.6) project( MIFF_Project ) add_subdirectory( src ) the CMakeLists.txt file in the MIFF/src directory is: cmake_minimum_required( VERSION 2.8.8 ) project( MIFF_Project ) enable_language( Fortran ) set( CMAKE_FORTRAN_COMPILER mpif90 ) file( GLOB MIFF_Code *.f* ) message( STATUS "MIFF_Code: ${MIFF_Code}" ) add_library( MIFF SHARED ${MIFF_Code} ) set_target_properties( MIFF PROPERTIES LINKER_LANGUAGE Fortran ) # OUTPUT_NAME MIFF ) I think I've exhausted Google looking for a solution, and I have a standard Makefile that seems to work fine: .PHONY : all clean run COMPILER = mpif90 FFLAGS = -shared -fPIC -g -I/usr/include LIBRARY = MIFF.so EXECUTABLE = MIFFTest EXESOURCES = src/MIFFTest.f08 \ src/MIFFTestMessage.f08 LIBSOURCES = src/MpiIocBaseMessage.f08 \ src/MpiIocControlMessage.f08 \ src/MpiIocLinkedListItem.f08 \ src/MpiIocFramework.f08 src/MIFFTest.o : src/MIFFTest.f08 src/MIFFTestMessage.f08 all : $(LIBRARY) $(EXECUTABLE) clean : - rm -f *.o *.so *.mod $(EXECUTABLE) run : export LD_LIBRARY_PATH=~/workspace/MIFF mpiexec -n 2 $(EXECUTABLE) $(LIBRARY) : $(LIBSOURCES) $(COMPILER) $(FFLAGS) $(LIBSOURCES) -o $(LIBRARY) $(EXECUTABLE) : $(EXESOURCES) $(LIBRARY) export LD_LIBRARY_PATH=~/workspace/MIFF $(COMPILER) -o $(EXECUTABLE) $(EXESOURCES) $(LIBRARY) Except for the problem of having to issue the "make all" twice because of a dependency problem I haven't worked out, this hand-crafted Makefile works. It's bad enough that I'm pushing the boundaries of polymorphism in MPI+OpenMP+Fortran. I'd appreciate any assistance getting cmake to work for my project. The information in this email and in any attachment(s) is commercial in confidence. If you are not the named addressee(s) or if you receive this email in error then any distribution, copying or use of this communication or the information in it is strictly prohibited. Please notify us immediately by email at admin.internet(at)awe.co.uk, and then delete this message from your computer. While attachments are virus checked, AWE plc does not accept any liability in respect of any virus which is not detected. AWE Plc Registered in England and Wales Registration No 02763902 AWE, Aldermaston, Reading, RG7 4PR
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