SCIP still recommends installing binaries on MacOS

[NLaws]

I have tried add SCIP#master on two different MacBooks, both with the latest OS and one with the M1 chips with no success.

Here is what I see:

nlaws-> julia
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.6.4 (2021-11-19)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

(@v1.6) pkg> add SCIP#master
    Updating git-repo `https://github.com/scipopt/SCIP.jl.git`
    Updating registry at `~/.julia/registries/General`
   Resolving package versions...
  No Changes to `~/.julia/environments/v1.6/Project.toml`
  No Changes to `~/.julia/environments/v1.6/Manifest.toml`

julia> using SCIP
[ Info: Precompiling SCIP [82193955-e24f-5292-bf16-6f2c5261a85f]
ERROR: LoadError: LoadError: SCIP was not built properly, please run Pkg.build("SCIP")
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:33
  [2] top-level scope
    @ ~/.julia/packages/SCIP/UDu6p/src/init.jl:7
  [3] include(mod::Module, _path::String)
    @ Base ./Base.jl:384
  [4] include(x::String)
    @ SCIP ~/.julia/packages/SCIP/UDu6p/src/SCIP.jl:1
  [5] top-level scope
    @ ~/.julia/packages/SCIP/UDu6p/src/SCIP.jl:7
  [6] include
    @ ./Base.jl:384 [inlined]
  [7] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::Nothing)
    @ Base ./loading.jl:1235
  [8] top-level scope
    @ none:1
  [9] eval
    @ ./boot.jl:360 [inlined]
 [10] eval(x::Expr)
    @ Base.MainInclude ./client.jl:446
 [11] top-level scope
    @ none:1
in expression starting at /Users/nlaws/.julia/packages/SCIP/UDu6p/src/init.jl:3
in expression starting at /Users/nlaws/.julia/packages/SCIP/UDu6p/src/SCIP.jl:1
ERROR: Failed to precompile SCIP [82193955-e24f-5292-bf16-6f2c5261a85f] to /Users/nlaws/.julia/compiled/v1.6/SCIP/jl_pqSqqz.
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::Base.TTY, internal_stdout::Base.TTY, ignore_loaded_modules::Bool)
   @ Base ./loading.jl:1385
 [3] compilecache(pkg::Base.PkgId, path::String)
   @ Base ./loading.jl:1329
 [4] _require(pkg::Base.PkgId)
   @ Base ./loading.jl:1043
 [5] require(uuidkey::Base.PkgId)
   @ Base ./loading.jl:936
 [6] require(into::Module, mod::Symbol)
   @ Base ./loading.jl:923

(@v1.6) pkg> build SCIP
    Building SCIP → `~/.julia/scratchspaces/44cfe95a-1eb2-52ea-b672-e2afdf69b78f/7e720366c240ee8b29dc52b11c2dffbd4a2c389f/build.log`
ERROR: Error building `SCIP`: 
ERROR: LoadError: Unable to locate SCIP installation. Tried:

/Users/nlaws/bin/libscip.dylib: could not load library "/Users/nlaws/bin/libscip.dylib"
dlopen(/Users/nlaws/bin/libscip.dylib, 1): image not found

/Users/nlaws/lib/libscip.dylib: could not load library "/Users/nlaws/lib/libscip.dylib"
dlopen(/Users/nlaws/lib/libscip.dylib, 1): image not found

libscip.dylib: could not load library "libscip.dylib"
dlopen(libscip.dylib, 1): image not found

Note that this must be downloaded separately from scip.zib.de.
Please set the environment variable SCIPOPTDIR to SCIP's installation path.

Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] top-level scope
   @ ~/.julia/packages/SCIP/UDu6p/deps/build.jl:56
 [3] include(fname::String)
   @ Base.MainInclude ./client.jl:444
 [4] top-level scope
   @ none:5
in expression starting at /Users/nlaws/.julia/packages/SCIP/UDu6p/deps/build.jl:55

[rschwarz]

To be sure, do you have set the ENV variable SCIPOPTDIR to something?

The user can set this variable in order to use their own library and not use SCIP_jll, see build.jl.

[NLaws]

Yes good catch! The solution for Mac is

unset SCIPOPTDIR