libgfortran not loaded error when trying to dlopen generated library on macOS.

[KristofferC]

Using https://github.com/KristofferC/OpenspecfunBuilder and replacing the dlopen_e with dlopen to see what the error is, I get:

julia> Pkg.build("SpecialFunctions")
INFO: Building SpecialFunctions
INFO: Found a valid dl path libopenspecfun.1.3.dylib while looking for libopenspecfun
INFO: /Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/usr/lib/libopenspecfun.1.3.dylib matches our search criteria of libopenspecfun
========================================================================================================[ ERROR: SpecialFunctions ]========================================================================================================

LoadError: could not load library "/Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/usr/lib/libopenspecfun.1.3.dylib"
dlopen(/Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/usr/lib/libopenspecfun.1.3.dylib, 1): Library not loaded: /opt/x86_64-apple-darwin14/x86_64-apple-darwin14/lib/libgfortran.4.dylib
  Referenced from: /Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/usr/lib/libopenspecfun.1.3.dylib
  Reason: image not found
while loading /Users/kristoffer/.julia/v0.6/SpecialFunctions/deps/build.jl, in expression starting on line 24

on macOS.

[staticfloat]

This is a great fortran test; In your Julia, what libgfortran is already loaded?

[KristofferC]

julia> Libdl.dllist()[contains.(Libdl.dllist(), "libgfortran")]
1-element Array{AbstractString,1}:
 "/Applications/Julia-0.6.app/Contents/Resources/julia/lib/julia/libgfortran.4.dylib"

[staticfloat]

Okay, so we are failing to rewrite the dependency to an @rpath one.

[KristofferC]

In the logs I also see:

INFO: Beginning audit of /home/travis/build/KristofferC/OpenspecfunBuilder/build/i686-linux-gnu/gkbwBvwh/destdir
INFO: Checking lib/libopenspecfun.so with RPath list Any[]
WARNING: Linked library libquadmath.so.0 could not be resolved and could not be auto-mapped
INFO: Checking lib/libopenspecfun.so.1 with RPath list Any[]
WARNING: Linked library libquadmath.so.0 could not be resolved and could not be auto-mapped
INFO: Checking lib/libopenspecfun.so.1.3 with RPath list Any[]
WARNING: Linked library libquadmath.so.0 could not be resolved and could not be auto-mapped

which is a dependency gfortran always put there, I think.

[staticfloat]

This should be fixed now.

[KristofferC]

Doesn't seem fixed: JuliaMath/OpenspecfunBuilder#9

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

julia> Libdl.dllist()[contains.(Libdl.dllist(), "libgfortran")]
 "/usr/local/opt/gcc/lib/gcc/7/libgfortran.4.dylib"

[KristofferC]

Or, well, it seems to be an @rpath now but it still fails to load.

[KristofferC]

Ok, dup of JuliaLinearAlgebra/OpenBLASBuilder#2