Libdl.find_library does not find library in current directory

General Usage
1

For some reason Julia 1.1.0 can no longer find my shared library (written in C, compiled with MinGW gcc) on Windows 10 (64-bit).
The commands I use are

cd("mydir")
run(`ls mylib.dll`) # is the lib in my current folder?
    #outputs: mylib.dll
    #outputs: Process(`ls mylib.dll`, ProcessExited(0))
using Libdl
find_library("mylib.dll", [pwd()])
    #outputs: ""

By the last output, Julia can’t find the library even though it is in the working directory.

This worked before but stopped after a crash while using Atom where I had to reinstall the julia-client package. I do not know if that is related

I tried to reinstall Julia, but nothing has changed.

What other steps could I take to debug why is my library not being found?

2

What happens if you do:

dlopen(joinpath(pwd(), "mylib.dll"))

(since this is what find_library does internally to check whether the library exists in the path you specify)?

3

It gives an ERROR: could not load library

Stacktrace:
 [1] #dlopen#3(::Bool, ::Function, ::String, ::UInt32) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Libdl\src\Libdl.jl:109
 [2] dlopen at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Libdl\src\Libdl.jl:109 [inlined] (repeats 2 times)
 [3] top-level scope at none:0

I do not understand why the pathing to cygwin. I installed Julia using the julia-1.1.0-win64.exe file, without touching cygwin (which is in a folder named cygwin64).