could not load library "libmkl_rt"

[AshtonSBradley]

Not sure I am doing this correctly, but:

julia> ENV["JULIA_FFTW_PROVIDER"]="MKL"
"MKL"

(v1.3) pkg> build FFTW
  Building Conda → `~/.julia/packages/Conda/kLXeC/deps/build.log`
  Building FFTW ─→ `~/.julia/packages/FFTW/loJ3F/deps/build.log`
┌ Error: Error building `FFTW`:
│ ERROR: LoadError: could not load library "libmkl_rt"
│ dlopen(libmkl_rt.dylib, 1): image not found
│ Stacktrace:
│  [1] #dlopen#3(::Bool, ::typeof(Libdl.dlopen), ::String, ::UInt32) at /Applications/Julia-1.3.app/Contents/Resources/julia/lib/julia/sys.dylib:?
│  [2] dlopen at /Applications/Julia-1.3.app/Contents/Resources/julia/share/julia/stdlib/v1.3/Libdl/src/Libdl.jl:109 [inlined] (repeats 2 times)
│  [3] dlpath(::String) at /Applications/Julia-1.3.app/Contents/Resources/julia/share/julia/stdlib/v1.3/Libdl/src/Libdl.jl:232
│  [4] top-level scope at /Users/abradley/.julia/packages/FFTW/loJ3F/deps/build.jl:22
│  [5] include_relative(::Module, ::String) at /Applications/Julia-1.3.app/Contents/Resources/julia/lib/julia/sys.dylib:?
│  [6] include(::Module, ::String) at /Applications/Julia-1.3.app/Contents/Resources/julia/lib/julia/sys.dylib:?
│  [7] include(::String) at ./client.jl:424
│  [8] top-level scope at none:5
│ in expression starting at /Users/abradley/.julia/packages/FFTW/loJ3F/deps/build.jl:20
└ @ Pkg.Operations /Applications/Julia-1.3.app/Contents/Resources/julia/share/julia/stdlib/v1.3/Pkg/src/backwards_compatible_isolation.jl:649

(v1.3) pkg> st MKL FFTW
    Status `~/.julia/environments/v1.3/Project.toml`
  [7a1cc6ca] FFTW v1.1.0
  [33e6dc65] MKL v0.0.0 #master (https://github.com/JuliaComputing/MKL.jl)

julia> versioninfo()
Julia Version 1.3.0
Commit 46ce4d7933 (2019-11-26 06:09 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin19.0.0)
  CPU: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, skylake)
Environment:
  JULIA_FFTW_PROVIDER = MKL

[ararslan]

Note that FFTW doesn't use the MKL package; prior to the (as yet untagged) changes on the master branch, Conda was used to provide a download of MKL. Not sure why it doesn't seem to be working for you, but I'd be interested to know whether current master works for you. Could you try that?

[AshtonSBradley]

Seems to be fixed on master - installs MKL_jll as advertised.

[giordano]

This should be exactly the error that led to the addition of IntelOpenMP to the package.

Seems to be fixed on master - installs MKL_jll as advertised.

I'm going to close the ticket