# Libdl : libifport.so.5: cannot open shared object file: No such file or directory

**URL:** <https://discourse.julialang.org/t/libdl-libifport-so-5-cannot-open-shared-object-file-no-such-file-or-directory/40598>\
**Category:** General Usage\
**Tags:** ccall\
**Created:** [June 2, 2020, 7:26am UTC](https://discourse.julialang.org/t/libdl-libifport-so-5-cannot-open-shared-object-file-no-such-file-or-directory/40598 "2020-06-02T07:26:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lian\_Yunlong](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lian_yunlong/32/14437_2.png) [@Lian\_Yunlong](https://discourse.julialang.org/u/Lian_Yunlong)\
**Post date:** [June 2, 2020, 7:26am UTC](https://discourse.julialang.org/t/libdl-libifport-so-5-cannot-open-shared-object-file-no-such-file-or-directory/40598/1 "2020-06-02T07:26:57Z")

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Hi everyone,

I wanted to connect a dynamic library compiled by Intel ifort to Julia. The compilation part was no problem. I ran

`$ ifort -shared -fPIC tt.f90 -o tt.so`

and got `tt.so`. Then I moved it to `/usr/lib/`.

Then I turned to Julia and ran

`julia> using Libdl`

`julia> lib = Libdl.dlopen("tt.so")`

and got error

```julia

julia> lib = Libdl.dlopen("tt.so")
ERROR: could not load library "tt.so"
libifport.so.5: cannot open shared object file: No such file or directory
Stacktrace:
 [1] dlopen(::String, ::UInt32; throw_error::Bool) at /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Libdl/src/Libdl.jl:109
 [2] dlopen at /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Libdl/src/Libdl.jl:109 [inlined] (repeats 2 times)
 [3] top-level scope at none:0

julia> lib = Libdl.dlopen("libifport.so.5")
ERROR: could not load library "libifport.so.5"
libifport.so.5: cannot open shared object file: No such file or directory
Stacktrace:
 [1] dlopen(::String, ::UInt32; throw_error::Bool) at /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Libdl/src/Libdl.jl:109
 [2] dlopen at /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Libdl/src/Libdl.jl:109 [inlined] (repeats 2 times)
 [3] top-level scope at none:0

```

What is the problem? Is it because of an inappropriate installation of Intel’s Fortran compiler?

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<div class="post-metadata">

**Author:** ![Elrod](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/elrod/32/22461_2.png) [@Elrod](https://discourse.julialang.org/u/Elrod)\
**Post date:** [June 2, 2020, 8:07am UTC](https://discourse.julialang.org/t/libdl-libifport-so-5-cannot-open-shared-object-file-no-such-file-or-directory/40598/2 "2020-06-02T08:07:14Z")

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`libifport.so.5` doesn’t seem to be on your `LD_LIBRARY_PATH`.  
Did your `source /path/to/compilervars.sh intel64` when compiling, but not before this Julia session?  
If yes, try sourcing it before starting Julia.  
If no, find this library’s location and add it to the path.