FYI: Doesn't load on Julia 1.5 musl version

[PallHaraldsson]

I could use RCall previously, and when I updated to Julia 1.5 I tried to choose the musl version (and installed musl C lib in Ubuntu).

[I assume it works on Julia 1.5 non-musl version just as it does only Julia 1.6.]

I tried with or without LD_LIBRARY_PATH:

$ LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/blas/libblas.so.3 ~/julia-1.5.0/bin/julia

julia> Pkg.build("RCall")
   Building Conda → `~/.julia/packages/Conda/3rPhK/deps/build.log`
   Building RCall → `~/.julia/packages/RCall/Qzssx/deps/build.log`
┌ Error: Error building `RCall`: 
│ ERROR: could not load library "/usr/lib/R/lib/libR.so"
│ Error loading shared library libblas.so.3: No such file or directory (needed by /usr/lib/R/lib/libR.so)
│ ERROR: LoadError: Try adding /usr/lib/R/lib to the "LD_LIBRARY_PATH" environmental variable and restarting Julia.
│ Stacktrace:
│  [1] error at ./error.jl:33
│  [2] validate_libR(::String) at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/setup.jl:26
│  [3] locate_libR(::SubString{String}) at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/setup.jl:43
│  [4] top-level scope at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/build.jl:53
│  [5] include(::String) at ./client.jl:457
│  [6] top-level scope at none:5
│ in expression starting at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/build.jl:11
│ caused by [exception 1]
│ could not load library "/usr/lib/R/lib/libR.so"
│ Error loading shared library libblas.so.3: No such file or directory (needed by /usr/lib/R/lib/libR.so)
│ Stacktrace:
│  [1] #dlopen#3 at /buildworker/worker/package_musl64/build/usr/share/julia/stdlib/v1.5/Libdl/src/Libdl.jl:109
│  [2] dlopen at /buildworker/worker/package_musl64/build/usr/share/julia/stdlib/v1.5/Libdl/src/Libdl.jl:109 [inlined] (repeats 2 times)
│  [3] validate_libR(::String) at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/setup.jl:16
│  [4] locate_libR(::SubString{String}) at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/setup.jl:43
│  [5] top-level scope at /home/pharaldsson_sym/.julia/packages/RCall/Qzssx/deps/build.jl:53
│  [6] include(::String) at ./client.jl:457
│  [7] top-level scope at none:5
└ @ Pkg.Operations /buildworker/worker/package_musl64/build/usr/share/julia/stdlib/v1.5/Pkg/src/Operations.jl:942

For some other packages for something similar to below I got errors, but I recall seeing musl in them, unlike for below (but like above):

I also get en error for below (and similar for Alpaca.jl that has RCall dependency):

julia> @time using RCall
[ Info: Precompiling RCall [6f49c342-dc21-5d91-9882-a32aef131414]
ERROR: LoadError: LoadError: InitError: could not load library "libRmath-julia.so"
Error loading shared library libRmath-julia.so: No such file or directory
Stacktrace:
 [1] __init__() at /home/pharaldsson_sym/.julia/packages/Rmath/lo1Ao/src/Rmath.jl:37
 [2] _include_from_serialized at ./loading.jl:697
 [3] _require_search_from_serialized at ./loading.jl:782
 [4] _require at ./loading.jl:1007
 [5] require at ./loading.jl:928
 [6] require at ./loading.jl:923
 [7] include at ./Base.jl:380
 [8] include at ./Base.jl:368 [inlined]
 [9] include(::String) at /home/pharaldsson_sym/.julia/packages/StatsFuns/CXyCV/src/StatsFuns.jl:3
 [10] top-level scope at /home/pharaldsson_sym/.julia/packages/StatsFuns/CXyCV/src/StatsFuns.jl:241
 [11] include at ./Base.jl:380
 [12] include at ./Base.jl:368
 [13] top-level scope at none:2
 [14] eval at ./boot.jl:331 [inlined]
 [15] eval(::Expr) at ./client.jl:467
 [16] top-level scope at ./none:3
during initialization of module Rmath
in expression starting at /home/pharaldsson_sym/.julia/packages/StatsFuns/CXyCV/src/rmath.jl:5
in expression starting at /home/pharaldsson_sym/.julia/packages/StatsFuns/CXyCV/src/StatsFuns.jl:241
ERROR: LoadError: Failed to precompile StatsFuns [4c63d2b9-4356-54db-8cca-17b64c39e42c] to /home/pharaldsson_sym/.julia/compiled/v1.5/StatsFuns/530lR_glT1O.ji.
Stacktrace:
 [1] error at ./error.jl:33

[..]

[ViralBShah]

Please reopen if still an issue.