Could not load library


I’ve been trying to run this code that I obtained from but I have the following error computing c_sum(a) :

ERROR: could not load library "C:\Users\myusername\AppData\Local\Temp\jl_2ZlYe4PqTE"
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and yes, there’s always some random characters like 0˘☺or Ђ�☺ at the end. I don’t understand…

a = rand(10^7) 

using Libdl
C_code = """
#include <stddef.h>
double c_sum(size_t n, double *X) {
    double s = 0.0;
    for (size_t i = 0; i < n; ++i) {
        s += X[i];
    return s;

const Clib = tempname()   # make a temporary file

# compile to a shared library by piping C_code to gcc

open(`gcc -fPIC -O3 -msse3 -xc -shared -o $(Clib * "." * Libdl.dlext) -`, "w") do f
    print(f, C_code) 

# define a Julia function that calls the C function:
c_sum(X::Array{Float64}) = ccall(("c_sum", Clib), Float64, (Csize_t, Ptr{Float64}), length(X), X)