Failed to open library

[KristofferC]

julia> Libdl.dlopen("deps/usr/lib/libopenspecfun.1.3.dylib")
ERROR: could not load library "deps/usr/lib/libopenspecfun.1.3.dylib"
dlopen(deps/usr/lib/libopenspecfun.1.3.dylib, 1): Library not loaded: @rpath/libgfortran.4.dylib
  Referenced from: /Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/usr/lib/libopenspecfun.1.3.dylib
  Reason: image not found
Stacktrace:
 [1] dlopen(::String, ::UInt32) at /Users/kristoffer/julia/usr/share/julia/stdlib/v0.7/Libdl/src/Libdl.jl:99 (repeats 2 times)
 [2] top-level scope at none:0

cc @andreasnoack

[andreasnoack]

I believe this is the same as JuliaLinearAlgebra/OpenBLASBuilder#2. Your system probably has libgfortran.5 installed (mine has through homebrew). dlopen should work with the official binaries since they are built with libgfortran.4.

[KristofferC]

Yeah, seems to work on my julia 0.6. I thought

julia> Libdl.dllist()[contains.(Libdl.dllist(), "libgfortran")]
1-element Array{AbstractString,1}:
 "/usr/local/opt/gcc/lib/gcc/7/libgfortran.4.dylib"

meant I had libgfortran.4 though.

[andreasnoack]

cc: @staticfloat

[staticfloat]

This is because @rpath/libgfortran.4.dylib is looking in your @rpath, which does not contain /usr/local/opt/gcc/lib/gcc/7/libgfortran.4.dylib. You most likely compiled from source, using the latestgfortran from Homebrew (which is GCC 8 now) which means that Julia auto-copied in libgfortran.5.dylib. I don't really recommend linking multiple libgfortran's into a single process. It's probably harmless here because all the "important" stuff will have already bound to the methods they need, but it's kind of like playing with fire in an armory.

The true solution to this is something like JuliaPackaging/BinaryBuilder.jl#253