I have encountered a rather strange error as I'm trying to create a wrapper for Fortran's TWPBVP (ODE BVP) solver.
Full code is available at https://github.com/mobius-eng/TWPBVP.jl After downloading (to julia's package directory), run Pkg.build("TWPBVP") and Pkg.test("TWPBVP") The issue (right now) is the parameter "aright" or "right": in Julia code it is set to "float(pi)", but when it is passed to Fortran's code, it becomes "0.0" To cut long story short, I have a problem of passing floating-point numbers from Julia to Fortran subroutine. Documentation suggests, that each parameter to Fortran's program needs "Ref{T}" wrapper as they are passed by reference (I've seen that older code also uses Ptr{T} with "&" at variable names). It works fine for integers (I even can see the difference if "FInt" alias is changed between "Int32" and "Int64" and if "-fdefault-integer-8" in compiling option is present or omitted). But I don't see a single floating point value passed correctly (including floating-point arrays). I've also tried, as an extreme measure, to pass a floating point parameter as a vector (of size 1) and have a corresponding type in ccall to be "Ptr{Float64}" SysInfo: Ubuntu 64-bit, Julia 0.5
