Try to use some tricks to get around julia #14577

For more discussion, see #42

inst/julia/setup.jl

@@ -9,6 +9,13 @@ module JuliaCall
 
 using Suppressor
 
+if !is_windows()
+    @suppress_err begin
+        @eval Base JULIA_HOME = joinpath(dirname(JULIA_HOME), "bin")
+        @eval Base julia_cmd() = julia_cmd(joinpath(JULIA_HOME, julia_exename()))
+    end
+end
+
 @suppress_err begin
     using RCall
 end