InitError and artifact folder

[bradcarman]

I'm attempting to create an app that has FFTW.jl as a dependency (I'm using the latest version v1.4.5). I can see that the app folder contains a folder artifacts\b7dd1809d0626eac3bf6f97ba8ccfbb6cc63c509\bin\libfftw3-3.dll. But this file is not included in the bin folder. I'm assuming that libfftw3-3.dll should be placed in the bin folder. Is that correct? Or should the app be distributed with both the bin and artifacts folders?

Additionally, if I copy the libfftw3-3.dll file from the artifacts folder to the bin folder, I still end up getting an

InitError(mod=:FFTW_jll, error=ErrorException("Artifact "FFWT" wsa not installed correctly...

I'm assuming this is a bug with PackageCompiler, but maybe something is not correct with the FFTW.jl use of the Artifact system.

[KristofferC]

I'm assuming that libfftw3-3.dll should be placed in the bin folder. Is that correct?

No, artifacts should not be in the bin folder, they should come shipped in the artifacts folder.

Can you provide the precise commands you are running and what error you hit?

[bradcarman]

OK, I think I see the problem. What I am trying to do is create a "Portable System Image". I thought I could use the create_app() function for this. So for example I am using:

create_app("FFTWPackage", "FFTWPackageCompiled"; force=true, cpu_target="core2")

Where FFTWPackage is

module FFTWPackage
using FFTW

function julia_main()::Cint
    println("Hello World!")
    y = fft(rand(100))
    println(y)
    return 0
end

end # module

When I create this app, it runs fine, so I can do:

bin> FFTWPackage.exe
Hello World!
ComplexF64[48.29591202577243 + 0.0im, 2.6175125666243817 + 0.6061253972272942im, -3.056669141453041 ....

But, what I thought I could do, but doesn't work is:

bin> julia -JFFTWPackage.dll

Which gives the error:

fatal: error thrown and no exception handler available.
InitError(mod=:FFTW_jll, error=ErrorException("Artifact "FFTW" was not installed correctly. Try `using Pkg; Pkg.instantiate()` to re-install all missing resources."))
error at .\error.jl:33
...

Note: c:\\Users\\<UserName>\\.julia needs to be removed to generate this error (which is how I test the portability)

Is there anyway I can launch the app version of Julia with the created system image which can load the portable assets?

[bradcarman]

OK, I sorted it out. I need to set the JULIA_DEPOT_PATH before launching julia with the app system image. On Windows (starting from the app output directory) I did...

Compiled>set JULIA_DEPOT_PATH=.&& bin\julia -J bin\FFTWPackage.dll
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.6.1 (2021-04-23)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

julia> FFTWPackage.julia_main()
Hello World!
ComplexF64[48.90104886444801 + 0.0im, 0.04000811104311941 - 0.834988070796802im, ....

[KristofferC]

Yes, one of the things the executable does is to set up the depot path.