# \[solved\] Can't install MPI.jl in julia 1.0.1/0.7.0 on a CENTOS 7.4 **URL:** \ **Category:** Julia at Scale\ **Tags:** compilation\ **Created:** [October 19, 2018, 1:43pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532 "2018-10-19T13:43:38Z")\ **Posts on this page:** 14\ **Page:** 1

**Author:** ![GM\_44](https://avatars.discourse-cdn.com/v4/letter/g/74df32/32.png) [@GM\_44](https://discourse.julialang.org/u/GM_44)\ **Post date:** [October 19, 2018, 1:43pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/1 "2018-10-19T13:43:38Z")

Hello, I’m new to Julia. I hope this post is at the right place. So, I have to install MPI.jl module for one of our users. It doesn’t work. I have installed Linux 64 bits binary versions of julia 0.7.0 and 1.0.1 `julia _ _ _ _(_)_ | A fresh approach to technical computing (_) | (_) (_) | Documentation: https://docs.julialang.org _ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help. | | | | | | |/ _` | | | | |_| | | | (_| | | Version 0.7.0 (2018-08-08 06:46 UTC) _/ |\ __‘_|_|_|\__ ’\_| | Official [http://julialang.org/](http://julialang.org/) release |\_\_/ | x86\_64-pc-linux-gnu (v0.7) pkg\> update Cloning default registries into //.julia/registries Cloning registry General from “[GitHub - JuliaRegistries/General: The official registry of general Julia packages](https://github.com/JuliaRegistries/General.git)” Updating registry at `~/.julia/registries/General` Updating git-repo `https://github.com/JuliaRegistries/General.git` Resolving package versions… (v0.7) pkg\> add [GitHub - JuliaParallel/MPI.jl: MPI wrappers for Julia](https://github.com/JuliaParallel/MPI.jl) Cloning git-repo `https://github.com/JuliaParallel/MPI.jl` Updating git-repo `https://github.com/JuliaParallel/MPI.jl` Resolving package versions… Installed URIParser ─ v0.4.0 Installed BinDeps ─── v0.8.10 Installed Compat ──── v1.3.0 Updating `~/.julia/environments/v0.7/Project.toml` [da04e1cc] + MPI v0.7.0 #master ([GitHub - JuliaParallel/MPI.jl: MPI wrappers for Julia](https://github.com/JuliaParallel/MPI.jl)) Updating `~/.julia/environments/v0.7/Manifest.toml` [9e28174c] + BinDeps v0.8.10 [34da2185] + Compat v1.3.0 [da04e1cc] + MPI v0.7.0 #master ([GitHub - JuliaParallel/MPI.jl: MPI wrappers for Julia](https://github.com/JuliaParallel/MPI.jl)) [30578b45] + URIParser v0.4.0 [2a0f44e3] + Base64 [ade2ca70] + Dates [8bb1440f] + DelimitedFiles [8ba89e20] + Distributed [b77e0a4c] + InteractiveUtils [76f85450] + LibGit2 [8f399da3] + Libdl [37e2e46d] + LinearAlgebra [56ddb016] + Logging [d6f4376e] + Markdown [a63ad114] + Mmap [44cfe95a] + Pkg [de0858da] + Printf [3fa0cd96] + REPL [9a3f8284] + Random [ea8e919c] + SHA [9e88b42a] + Serialization [1a1011a3] + SharedArrays [6462fe0b] + Sockets [2f01184e] + SparseArrays [10745b16] + Statistics [8dfed614] + Test [cf7118a7] + UUIDs [4ec0a83e] + Unicode Building MPI → `~/.julia/packages/MPI/U5ujD/deps/build.log` julia\> using MPI [Info: Precompiling MPI [da04e1cc-30fd-572f-bb4f-1f8673147195] ERROR: LoadError: LoadError: UndefVarError: MPI\_COMM\_NULL not defined Stacktrace: [1] top-level scope at none:0 [2] include at ./boot.jl:317 [inlined] [3] include\_relative(::Module, ::String) at ./loading.jl:1038 [4] include at ./sysimg.jl:29 [inlined] [5] include(::String) at //.julia/packages/MPI/U5ujD/src/MPI.jl:3 [6] top-level scope at none:0 [7] include at ./boot.jl:317 [inlined] [8] include\_relative(::Module, ::String) at ./loading.jl:1038 [9] include(::Module, ::String) at ./sysimg.jl:29 [10] top-level scope at none:2 [11] eval at ./boot.jl:319 [inlined] [12] eval(::Expr) at ./client.jl:399 [13] top-level scope at ./none:3 in expression starting at //.julia/packages/MPI/U5ujD/src/mpi-base.jl:73 in expression startiing at //.julia/packages/MPI/U5ujD/src/MPI.jl:20 ERROR: Failed to precompile MPI [da04e1cc-30fd-572f-bb4f-1f8673147195] to //.julia/compiled/v0.7/MPI/nO0XF.ji. Stacktrace: [1] error(::String) at ./error.jl:33 [2] macro expansion at ./logging.jl:313 [inlined] [3] compilecache(::Base.PkgId, ::String) at ./loading.jl:1185 [4] \_require(::Base.PkgId) at ./logging.jl:311 [5] require(::Base.PkgId) at ./loading.jl:852 [6] macro expansion at ./logging.jl:311 [inlined] [7] require(::Module, ::Symbol) at ./loading.jl:834` If I look at the build.log file, everything seems to be OK, no warning or error message. However, I notice that I can’t make usage of ‘module loaded’ recent version of gcc , It takes /usr/bin/gcc ! Regards, Guy. ---

**Author:** ![JaredCrean2](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jaredcrean2/32/3574_2.png) [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)\ **Post date:** [October 19, 2018, 2:32pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/2 "2018-10-19T14:32:37Z")

The problem with GCC version is that CMake does not always use `PATH` to find compilers. To fix this, set the `CC` and `FC` environment variables to the compilers you want to use and then re-run the build script for MPI.jl. Note that you should use the MPI compiler wrappers for the compilers loaded with `module load`. I usually do ```julia export CC=`which mpicc` export FC=`which mpif90` ``` I’m not sure if this is the problem with `MPI_COMM_NULL` not being defined, but let’s start here an see what happens. Also, can you post the contents of ` ~/.julia/packages/MPI/U5ujD/deps/build.log`? I think that is where the output from the MPI.jl build script was redirected to. ---

**Author:** ![GM\_44](https://avatars.discourse-cdn.com/v4/letter/g/74df32/32.png) [@GM\_44](https://discourse.julialang.org/u/GM_44)\ **Post date:** [October 19, 2018, 3:13pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/3 "2018-10-19T15:13:03Z")

Thank you for your message So I fix FC and CC as you do and it works better. I get the build MPI done, with gcc/gfortran version 8.1.0 instead of the old ones of the system. ```julia (v0.7) pkg> add https://github.com/JuliaParallel/MPI.jl Cloning git-repo `https://github.com/JuliaParallel/MPI.jl` Updating git-repo `https://github.com/JuliaParallel/MPI.jl` Resolving package versions... Installed URIParser ─ v0.4.0 Installed Compat ──── v1.3.0 Installed BinDeps ─── v0.8.10 Updating `~/.julia/environments/v0.7/Project.toml` [da04e1cc] + MPI v0.7.0 #master (https://github.com/JuliaParallel/MPI.jl) Updating `~/.julia/environments/v0.7/Manifest.toml` [9e28174c] + BinDeps v0.8.10 [34da2185] + Compat v1.3.0 [da04e1cc] + MPI v0.7.0 #master (https://github.com/JuliaParallel/MPI.jl) [30578b45] + URIParser v0.4.0 [2a0f44e3] + Base64 [ade2ca70] + Dates [8bb1440f] + DelimitedFiles [8ba89e20] + Distributed [b77e0a4c] + InteractiveUtils [76f85450] + LibGit2 [8f399da3] + Libdl [37e2e46d] + LinearAlgebra [56ddb016] + Logging [d6f4376e] + Markdown [a63ad114] + Mmap [44cfe95a] + Pkg [de0858da] + Printf [3fa0cd96] + REPL [9a3f8284] + Random [ea8e919c] + SHA [9e88b42a] + Serialization [1a1011a3] + SharedArrays [6462fe0b] + Sockets [2f01184e] + SparseArrays [10745b16] + Statistics [8dfed614] + Test [cf7118a7] + UUIDs [4ec0a83e] + Unicode Building MPI → `~/.julia/packages/MPI/U5ujD/deps/build.log` ``` build.log is : ```julia -- The Fortran compiler identification is GNU 8.1.0 -- The C compiler identification is GNU 8.1.0 -- Check for working Fortran compiler: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpif90 -- Check for working Fortran compiler: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpif90 -- works -- Detecting Fortran compiler ABI info -- Detecting Fortran compiler ABI info - done -- Checking whether /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpif90 supports Fortran 90 -- Checking whether /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpif90 supports Fortran 90 -- yes -- Check for working C compiler: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpicc -- Check for working C compiler: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpicc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Found Git: /trinity/shared/apps/cv-standard/git/2.16.1/bin/git (found version "2.16.1") -- Found MPI_C: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpicc (found version "3.1") -- Found MPI_Fortran: /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/bin/mpif90 (found version "3.1") -- Found MPI: TRUE (found version "3.1") -- Detecting Fortran/C Interface -- Detecting Fortran/C Interface - Found GLOBAL and MODULE mangling -- Looking for MPI_Comm_c2f -- Looking for MPI_Comm_c2f - not found -- Configuring done -- Generating done -- Build files have been written to: //.julia/packages/MPI/U5ujD/deps/build Scanning dependencies of target gen_functions [11%] Building C object CMakeFiles/gen_functions.dir/gen_functions.c.o [22%] Linking C executable gen_functions [22%] Built target gen_functions Scanning dependencies of target gen_constants [33%] Building Fortran object CMakeFiles/gen_constants.dir/gen_constants.f90.o [44%] Linking Fortran executable gen_constants /usr/bin/ld: warning: libgfortran.so.4, needed by /trinity/shared/apps/ccipl/machine-dependant/nazare-dc/soft/mvapich2/psm2/gcc72/2.2.3b/lib/libmpifort.so, may conflict with libgfortran.so.5 [44%] Built target gen_constants Scanning dependencies of target mpijl-build [55%] Generating mpi-build.jl [55%] Built target mpijl-build Scanning dependencies of target mpijl [66%] Generating compile-time.jl [66%] Built target mpijl Scanning dependencies of target juliampi [77%] Building C object CMakeFiles/juliampi.dir/juliampi.c.o [88%] Building Fortran object CMakeFiles/juliampi.dir/test_mpi.f90.o [100%] Linking Fortran shared library libjuliampi.so [100%] Built target juliampi [22%] Built target gen_functions [44%] Built target gen_constants [55%] Built target mpijl-build [66%] Built target mpijl [100%] Built target juliampi Install the project... -- Install configuration: "" -- Installing: /path>/.julia/packages/MPI/U5ujD/deps/src/./compile-time.jl -- Installing: /path>/.julia/packages/MPI/U5ujD/deps/usr/lib/libjuliampi.so [ Info: Attempting to create directory /home/CCIPL//.julia/packages/MPI/U5ujD/deps/build [ Info: Changing directory to /path>/.julia/packages/MPI/U5ujD/deps/build ``` The command “using MPI” works fine now. ```julia using MPI [Info: Precompiling MPI [da04e1cc-30fd-572f-bb4f-1f8673147195] ``` So I exit julia, and I launch on the command line the first example ([https://github.com/JuliaParallel/MPI.jl/blob/master/examples/01-hello.jl](https://github.com/JuliaParallel/MPI.jl/blob/master/examples/01-hello.jl)) : ```julia mpirun -np 3 julia 01-hello.jl Hello world, I am 0 of 3 Hello world, I am 1 of 3 Hello world, I am 2 of 3 [0] 512 at [0x0000000002260ec8], d/ch3/channels/common/src/affinity/hwloc_bind.c[2090] [2] 512 at [0x000000000235f7a8], d/ch3/channels/common/src/affinity/hwloc_bind.c[2090] [1] 512 at [0x0000000000d4e958], d/ch3/channels/common/src/affinity/hwloc_bind.c[2090] ``` My MPI implementation is MVAPICH2, v 2.2.3b I will retry with OpenMPI to see if I get the same final behavior. Thank you for your help. Regards, ---

**Author:** ![GM\_44](https://avatars.discourse-cdn.com/v4/letter/g/74df32/32.png) [@GM\_44](https://discourse.julialang.org/u/GM_44)\ **Post date:** [October 22, 2018, 8:00am UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/4 "2018-10-22T08:00:03Z")

It’s working fine with OpenMPI. Thank you for your help. Regards, ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 27, 2019, 4:51pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/5 "2019-02-27T16:51:11Z")

This does not work for me with OpenMPI. Have been dealing with this for multiple weeks now. ```julia (v1.0) pkg> add MPI Resolving package versions... Updating `~/.julia/environments/v1.0/Project.toml` [da04e1cc] + MPI v0.7.2 Updating `~/.julia/environments/v1.0/Manifest.toml` [da04e1cc] + MPI v0.7.2 (v1.0) pkg> precompile Precompiling project... Precompiling MPI [Info: Precompiling MPI [da04e1cc-30fd-572f-bb4f-1f8673147195] ERROR: LoadError: LoadError: UndefVarError: MPI_COMM_NULL not defined Stacktrace: [1] top-level scope at none:0 [2] include at ./boot.jl:317 [inlined] [3] include_relative(::Module, ::String) at ./loading.jl:1041 [4] include at ./sysimg.jl:29 [inlined] [5] include(::String) at /home/ubuntu/.julia/packages/MPI/U5ujD/src/MPI.jl:3 [6] top-level scope at none:0 [7] include at ./boot.jl:317 [inlined] [8] include_relative(::Module, ::String) at ./loading.jl:1041 [9] include(::Module, ::String) at ./sysimg.jl:29 [10] top-level scope at none:2 [11] eval at ./boot.jl:319 [inlined] [12] eval(::Expr) at ./client.jl:389 [13] top-level scope at ./none:3 in expression starting at /home/ubuntu/.julia/packages/MPI/U5ujD/src/mpi-base.jl:73 in expression starting at /home/ubuntu/.julia/packages/MPI/U5ujD/src/MPI.jl:20 ERROR: Failed to precompile MPI [da04e1cc-30fd-572f-bb4f-1f8673147195] to /home/ubuntu/.julia/compiled/v1.0/MPI/nO0XF.ji. Stacktrace: [1] error(::String) at ./error.jl:33 [2] macro expansion at ./logging.jl:313 [inlined] [3] compilecache(::Base.PkgId, ::String) at ./loading.jl:1187 [4] precompile(::Pkg.Types.Context) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/API.jl:506 [5] do_precompile!(::Dict{Symbol,Any}, ::Array{String,1}, ::Dict{Symbol,Any}) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:662 [6] #invokelatest#1(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Any, ::Any, ::Vararg{Any,N} where N) at ./essentials.jl:697 [7] invokelatest(::Any, ::Any, ::Vararg{Any,N} where N) at ./essentials.jl:696 [8] do_cmd!(::Pkg.REPLMode.PkgCommand, ::REPL.LineEditREPL) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:603 [9] #do_cmd#33(::Bool, ::Function, ::REPL.LineEditREPL, ::String) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:577 [10] do_cmd at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:573 [inlined] [11] (::getfield(Pkg.REPLMode, Symbol("##44#47")){REPL.LineEditREPL,REPL.LineEdit.Prompt})(::REPL.LineEdit.MIState, ::Base.GenericIOBuffer{Array{UInt8,1}}, ::Bool) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Pkg/src/REPLMode.jl:912 [12] #invokelatest#1 at ./essentials.jl:697 [inlined] [13] invokelatest at ./essentials.jl:696 [inlined] [14] run_interface(::REPL.Terminals.TextTerminal, ::REPL.LineEdit.ModalInterface, ::REPL.LineEdit.MIState) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/LineEdit.jl:2261 [15] run_frontend(::REPL.LineEditREPL, ::REPL.REPLBackendRef) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/REPL.jl:1029 [16] run_repl(::REPL.AbstractREPL, ::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/REPL/src/REPL.jl:191 [17] (::getfield(Base, Symbol("##719#721")){Bool,Bool,Bool,Bool})(::Module) at ./logging.jl:311 [18] #invokelatest#1 at ./essentials.jl:697 [inlined] [19] invokelatest at ./essentials.jl:696 [inlined] [20] macro expansion at ./logging.jl:308 [inlined] [21] run_main_repl(::Bool, ::Bool, ::Bool, ::Bool, ::Bool) at ./client.jl:330 [22] exec_options(::Base.JLOptions) at ./client.jl:242 [23] _start() at ./client.jl:421 ``` ---

**Author:** ![JaredCrean2](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jaredcrean2/32/3574_2.png) [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)\ **Post date:** [February 27, 2019, 5:56pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/6 "2019-02-27T17:56:33Z")

Can you post the contents of the file `/home/ubuntu/.julia/packages/MPI/deps/src/compile-time.jl`? ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 27, 2019, 8:40pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/7 "2019-02-27T20:40:44Z")

```julia const libmpi = "/home/ubuntu/.julia/packages/MPI/U5ujD/deps/usr/lib/libjuliampi" using Compat import Compat.String const _mpi_functions = Dict{Symbol, String}( :MPI_ABORT => "mpi_abort_", :MPI_ACCUMULATE => "mpi_accumulate_", :MPI_ALLGATHER => "mpi_allgather_", :MPI_ALLGATHERV => "mpi_allgatherv_", :MPI_ALLREDUCE => "mpi_allreduce_", :MPI_ALLTOALL => "mpi_alltoall_", :MPI_ALLTOALLV => "mpi_alltoallv_", :MPI_BARRIER => "mpi_barrier_", :MPI_BCAST => "mpi_bcast_", :MPI_BSEND => "mpi_bsend_", :MPI_CANCEL => "mpi_cancel_", :MPI_COMM_DUP => "mpi_comm_dup_", :MPI_COMM_FREE => "mpi_comm_free_", :MPI_COMM_GET_PARENT => "mpi_comm_get_parent_", :MPI_COMM_RANK => "mpi_comm_rank_", :MPI_COMM_SIZE => "mpi_comm_size_", :MPI_COMM_SPLIT => "mpi_comm_split_", :MPI_COMM_SPLIT_TYPE => "mpi_comm_split_type_", :MPI_EXSCAN => "mpi_exscan_", :MPI_FETCH_AND_OP => "mpi_fetch_and_op_", :MPI_FINALIZE => "mpi_finalize_", :MPI_FINALIZED => "mpi_finalized_", :MPI_GATHER => "mpi_gather_", :MPI_GATHERV => "mpi_gatherv_", :MPI_GET => "mpi_get_", :MPI_GET_ACCUMULATE => "mpi_get_accumulate_", :MPI_GET_ADDRESS => "mpi_get_address_", :MPI_GET_COUNT => "mpi_get_count_", :MPI_GET_PROCESSOR_NAME => "mpi_get_processor_name_", :MPI_INFO_CREATE => "mpi_info_create_", :MPI_INFO_DELETE => "mpi_info_delete_", :MPI_INFO_FREE => "mpi_info_free_", :MPI_INFO_GET => "mpi_info_get_", :MPI_INFO_GET_VALUELEN => "mpi_info_get_valuelen_", :MPI_INFO_SET => "mpi_info_set_", :MPI_INIT => "mpi_init_", :MPI_INITIALIZED => "mpi_initialized_", :MPI_INTERCOMM_MERGE => "mpi_intercomm_merge_", :MPI_IPROBE => "mpi_iprobe_", :MPI_IRECV => "mpi_irecv_", :MPI_ISEND => "mpi_isend_", :MPI_OP_CREATE => "mpi_op_create_", :MPI_OP_FREE => "mpi_op_free_", :MPI_PACK => "mpi_pack_", :MPI_PACK_SIZE => "mpi_pack_size_", :MPI_PROBE => "mpi_probe_", :MPI_PUT => "mpi_put_", :MPI_RECV => "mpi_recv_", :MPI_RECV_INIT => "mpi_recv_init_", :MPI_REDUCE => "mpi_reduce_", :MPI_REQUEST_FREE => "mpi_request_free_", :MPI_RSEND => "mpi_rsend_", :MPI_SCAN => "mpi_scan_", :MPI_SCATTER => "mpi_scatter_", :MPI_SCATTERV => "mpi_scatterv_", :MPI_SEND => "mpi_send_", :MPI_SEND_INIT => "mpi_send_init_", :MPI_SSEND => "mpi_ssend_", :MPI_TEST => "mpi_test_", :MPI_TESTALL => "mpi_testall_", :MPI_TESTANY => "mpi_testany_", :MPI_TESTSOME => "mpi_testsome_", :MPI_UNPACK => "mpi_unpack_", :MPI_WAIT => "mpi_wait_", :MPI_WAITALL => "mpi_waitall_", :MPI_WAITANY => "mpi_waitany_", :MPI_WAITSOME => "mpi_waitsome_", :MPI_WIN_ATTACH => "mpi_win_attach_", :MPI_WIN_CREATE => "mpi_win_create_", :MPI_WIN_CREATE_DYNAMIC => "mpi_win_create_dynamic_", :MPI_WIN_DETACH => "mpi_win_detach_", :MPI_WIN_FENCE => "mpi_win_fence_", :MPI_WIN_FLUSH => "mpi_win_flush_", :MPI_WIN_FREE => "mpi_win_free_", :MPI_WIN_LOCK => "mpi_win_lock_", :MPI_WIN_SYNC => "mpi_win_sync_", :MPI_WIN_UNLOCK => "mpi_win_unlock_", :MPI_WTICK => "mpi_wtick_", :MPI_WTIME => "mpi_wtime_", :MPI_TYPE_CREATE_STRUCT => "mpi_type_create_struct_", :MPI_TYPE_COMMIT => "mpi_type_commit_", ) primitive type CComm 64 end primitive type CInfo 64 end primitive type CWin 64 end const HAVE_MPI_COMM_C2F = true ``` Thanks for your prompt response! ---

**Author:** ![JaredCrean2](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jaredcrean2/32/3574_2.png) [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)\ **Post date:** [February 27, 2019, 9:13pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/8 "2019-02-27T21:13:30Z")

Are you sure the build of MPI.jl completed successfully (have a look at `deps/build.log`)? There is a section of the file missing. In addition to looking at the build log, can you check if `deps/build/gen_constants` exists? If so, can you run it and post the output? This is the executable that prints out the information that goes into the missing section of `compile-time.jl`. ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 27, 2019, 10:30pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/9 "2019-02-27T22:30:40Z")

Build is successful ```julia -- The Fortran compiler identification is GNU 5.5.0 -- The C compiler identification is GNU 5.5.0 -- Check for working Fortran compiler: /home/linuxbrew/.linuxbrew/bin/mpif90 -- Check for working Fortran compiler: /home/linuxbrew/.linuxbrew/bin/mpif90 -- works -- Detecting Fortran compiler ABI info -- Detecting Fortran compiler ABI info - done -- Checking whether /home/linuxbrew/.linuxbrew/bin/mpif90 supports Fortran 90 -- Checking whether /home/linuxbrew/.linuxbrew/bin/mpif90 supports Fortran 90 -- yes -- Check for working C compiler: /home/linuxbrew/.linuxbrew/bin/mpicc -- Check for working C compiler: /home/linuxbrew/.linuxbrew/bin/mpicc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Found Git: /usr/bin/git (found version "2.7.4") -- Found MPI_C: /home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi.so -- Found MPI_Fortran: /home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi_usempif08.so;/home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi_usempi_ignore_tkr.so;/home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi_mpifh.so;/home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi.so -- Detecting Fortran/C Interface -- Detecting Fortran/C Interface - Found GLOBAL and MODULE mangling -- Looking for MPI_Comm_c2f -- Looking for MPI_Comm_c2f - found -- Configuring done -- Generating done -- Build files have been written to: /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build Scanning dependencies of target gen_constants [11%] Building Fortran object CMakeFiles/gen_constants.dir/gen_constants.f90.o [22%] Linking Fortran executable gen_constants /usr/bin/ld: warning: libgfortran.so.3, needed by /home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libmpi_usempif08.so, may conflict with libgfortran.so.4 [22%] Built target gen_constants Scanning dependencies of target gen_functions [33%] Building C object CMakeFiles/gen_functions.dir/gen_functions.c.o [44%] Linking C executable gen_functions [44%] Built target gen_functions Scanning dependencies of target mpijl-build [55%] Generating mpi-build.jl /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build/gen_constants: error while loading shared libraries: libgfortran.so.4: cannot open shared object file: No such file or directory [55%] Built target mpijl-build Scanning dependencies of target mpijl [66%] Generating compile-time.jl /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build/gen_constants: error while loading shared libraries: libgfortran.so.4: cannot open shared object file: No such file or directory [66%] Built target mpijl Scanning dependencies of target juliampi [77%] Building C object CMakeFiles/juliampi.dir/juliampi.c.o [88%] Building Fortran object CMakeFiles/juliampi.dir/test_mpi.f90.o [100%] Linking Fortran shared library libjuliampi.so [100%] Built target juliampi [22%] Built target gen_constants [44%] Built target gen_functions [55%] Built target mpijl-build [66%] Built target mpijl [100%] Built target juliampi Install the project... -- Install configuration: "" -- Installing: /home/ubuntu/.julia/packages/MPI/U5ujD/deps/src/./compile-time.jl -- Installing: /home/ubuntu/.julia/packages/MPI/U5ujD/deps/usr/lib/libjuliampi.so [ Info: Attempting to create directory /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build [ Info: Changing directory to /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build ``` Output of `deps/build/gen_constants` is `./gen_constants: error while loading shared libraries: libgfortran.so.4: cannot open shared object file: No such file or directory` ---

**Author:** ![JaredCrean2](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jaredcrean2/32/3574_2.png) [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)\ **Post date:** [February 27, 2019, 11:06pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/10 "2019-02-27T23:06:41Z")

Not finding `libgfortran` is the root cause of the problem. The fact that the build system failed to execute `gen_constants` but reported success anyways is another problem. With other software, I have solved issues like this by making sure the `/lib` directory where the compiler is installed is in my `LD_LIBRARY_PATH`. If you have more than once compiler installed, make sure it is the `/lib` directory of the compiler `mpif90` is wrapping. Something you can do to check if your current environment is set correctly is `ldd ./gen_constants`. This prints out all the libraries the exectuable is dynamically linked to and their locations, and will print `not found` if it can’t find one. ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 27, 2019, 11:44pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/11 "2019-02-27T23:44:50Z")

> [@JaredCrean2](#): > > LD\_LIBRARY\_PATH There seems to be a problem. Here is the content of `/home/ubuntu/.linuxbrew/lib/` where `libgfortran.so.4` should be located but it is missing completely … ```julia lrwxrwxrwx 1 ubuntu ubuntu 37 Feb 27 22:59 libgcc_s.so -> ../Cellar/gcc/5.5.0_4/lib/libgcc_s.so* lrwxrwxrwx 1 ubuntu ubuntu 39 Feb 27 22:59 libgcc_s.so.1 -> ../Cellar/gcc/5.5.0_4/lib/libgcc_s.so.1* lrwxrwxrwx 1 ubuntu ubuntu 39 Feb 27 22:59 libgfortran.a -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.a lrwxrwxrwx 1 ubuntu ubuntu 40 Feb 27 22:59 libgfortran.so -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so* lrwxrwxrwx 1 ubuntu ubuntu 42 Feb 27 22:59 libgfortran.so.3 -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so.3* lrwxrwxrwx 1 ubuntu ubuntu 46 Feb 27 22:59 libgfortran.so.3.0.0 -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so.3.0.0* lrwxrwxrwx 1 ubuntu ubuntu 42 Feb 27 22:59 libgfortran.spec -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.spec ``` Here is `ldd ./gen_constants` ```julia uche:~$ ldd /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build/gen_constants linux-vdso.so.1 => (0x00007ffce83e3000) libmpi_usempif08.so.40 => /home/linuxbrew/.linuxbrew/lib/libmpi_usempif08.so.40 (0x00007f84d8828000) libmpi_usempi_ignore_tkr.so.40 => /home/linuxbrew/.linuxbrew/lib/libmpi_usempi_ignore_tkr.so.40 (0x00007f84d861f000) libmpi_mpifh.so.40 => /home/linuxbrew/.linuxbrew/lib/libmpi_mpifh.so.40 (0x00007f84d83b2000) libmpi.so.40 => /home/linuxbrew/.linuxbrew/lib/libmpi.so.40 (0x00007f84d8096000) libgfortran.so.4 => not found libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f84d7d8d000) libgcc_s.so.1 => /home/linuxbrew/.linuxbrew/lib/libgcc_s.so.1 (0x00007f84d7b76000) libquadmath.so.0 => /home/linuxbrew/.linuxbrew/lib/libquadmath.so.0 (0x00007f84d7937000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f84d771a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f84d7350000) libopen-rte.so.40 => /home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libopen-rte.so.40 (0x00007f84d7090000) libopen-pal.so.40 => /home/linuxbrew/.linuxbrew/Cellar/open-mpi/4.0.0/lib/libopen-pal.so.40 (0x00007f84d6d96000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f84d6b92000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f84d698a000) libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f84d6787000) libz.so.1 => /home/linuxbrew/.linuxbrew/lib/libz.so.1 (0x00007f84d6572000) libevent-2.1.so.6 => /home/linuxbrew/.linuxbrew/lib/libevent-2.1.so.6 (0x00007f84d6329000) libevent_pthreads-2.1.so.6 => /home/linuxbrew/.linuxbrew/lib/libevent_pthreads-2.1.so.6 (0x00007f84d6125000) libgfortran.so.3 => /home/linuxbrew/.linuxbrew/lib/libgfortran.so.3 (0x00007f84d5dfc000) /home/linuxbrew/.linuxbrew/lib/ld.so => /lib64/ld-linux-x86-64.so.2 (0x00007f84d8a62000) ``` And gcc is fully installed `````julia uche:~$ brew install gcc --with-glibc Warning: gcc 5.5.0_4 is already installed and up-to-date To reinstall 5.5.0_4, run `brew reinstall gcc```` ````` ---

**Author:** ![JaredCrean2](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jaredcrean2/32/3574_2.png) [@JaredCrean2](https://discourse.julialang.org/u/JaredCrean2)\ **Post date:** [February 27, 2019, 11:59pm UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/12 "2019-02-27T23:59:29Z")

That’s odd. It looks like you are using linuxbrew to install stuff. My guess is something went wrong betweeen the gcc and mpi installations. I don’t have any experience with linuxbrew, but my next suggestion is to find where `libgfortran.so.4` is installed (`ldconfig -p` may be helpful here), and hopefully that will give you a hint as to what was happening at link time for `gen_constants`. ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 28, 2019, 12:31am UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/13 "2019-02-28T00:31:14Z")

So I installed gcc-7 using Linuxbrew Then linked libgfortran.so.4 where the others were located `/home/ubuntu/.linuxbrew/lib`: ```julia lrwxrwxrwx 1 ubuntu ubuntu 37 Feb 27 22:59 libgcc_s.so -> ../Cellar/gcc/5.5.0_4/lib/libgcc_s.so* lrwxrwxrwx 1 ubuntu ubuntu 39 Feb 27 22:59 libgcc_s.so.1 -> ../Cellar/gcc/5.5.0_4/lib/libgcc_s.so.1* lrwxrwxrwx 1 ubuntu ubuntu 39 Feb 27 22:59 libgfortran.a -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.a lrwxrwxrwx 1 ubuntu ubuntu 40 Feb 27 22:59 libgfortran.so -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so* lrwxrwxrwx 1 ubuntu ubuntu 42 Feb 27 22:59 libgfortran.so.3 -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so.3* lrwxrwxrwx 1 ubuntu ubuntu 46 Feb 27 22:59 libgfortran.so.3.0.0 -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.so.3.0.0* lrwxrwxrwx 1 ubuntu ubuntu 69 Feb 28 00:11 libgfortran.so.4 -> /home/ubuntu/.linuxbrew/Cellar/gcc@7/7.4.0/lib/gcc/7/libgfortran.so.4* lrwxrwxrwx 1 ubuntu ubuntu 73 Feb 28 00:12 libgfortran.so.4.0.0 -> /home/ubuntu/.linuxbrew/Cellar/gcc@7/7.4.0/lib/gcc/7/libgfortran.so.4.0.0* lrwxrwxrwx 1 ubuntu ubuntu 42 Feb 27 22:59 libgfortran.spec -> ../Cellar/gcc/5.5.0_4/lib/libgfortran.spec ``` Still it is not found! This is weird… ```julia uche:~$ ldd /home/ubuntu/.julia/packages/MPI/U5ujD/deps/build/gen_constants linux-vdso.so.1 => (0x00007ffcd7da4000) libgfortran.so.4 => not found libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fd950517000) /lib64/ld-linux-x86-64.so.2 (0x00007fd9508e1000) ``` So if you are not using linuxbrew to install openmpi, what are you using? Cos the openmpi in Ubuntu repo is way too old and causing problems ---

**Author:** ![Uche](https://avatars.discourse-cdn.com/v4/letter/u/d26b3c/32.png) [@Uche](https://discourse.julialang.org/u/Uche)\ **Post date:** [February 28, 2019, 12:47am UTC](https://discourse.julialang.org/t/solved-cant-install-mpi-jl-in-julia-1-0-1-0-7-0-on-a-centos-7-4/16532/14 "2019-02-28T00:47:19Z")

> [@JaredCrean2](#): > > `ldconfig -p` may be helpful here Finally solved!!! I found Ubuntu repo for libgfortran.so.4 ```julia sudo add-apt-repository ppa:jonathonf/gcc-7.1 sudo apt-get update sudo apt-get install gcc-7 g++-7 sudo apt-get install gfortran-7 ``` And everything was fixed! Thanks.