=== STEP 1 ===
--- Install msys2 64-bit and update it

=== STEP 2 ===
--- Install msys2 packages (pacman -S package_name)

* setup.py file assumes that msys2 is installed on the default location. If
not, you'll have to change the paths in include_dirs and library_dirs to
reflect your installation.

mingw-w64-x86_64-toolchain
make
autoconf
automake
libtool
subversion
git
mingw-w64-x86_64-libsndfile
mingw-w64-x86_64-portaudio
mingw-w64-x86_64-portmidi

=== STEP 3 ===
Compile liblo:
    
Close your MSYS2 shell and open a MinGW64 MSYS2 shell.

cd ~/Downloads
git clone https://github.com/guysherman/MINGW-packages.git  
cd MINGW-packages  
git checkout guypkgs  
cd mingw-w64-liblo && makepkg-mingw --install && cd ..  

=== STEP 4 ===
Add the MinGW and MSYS2 bin dirs to your Windows PATH:

Open System Properties, click Environment Variables,
Then edit the system Path variable. Add these two paths in this order:

C:\msys64\mingw64\bin  
C:\msys64\usr\bin  

=== STEP 5 ===
--- Install pthreads (just copy files from ftp):
ftp://sourceware.org/pub/pthreads-win32/dll-latest/
C:\pthreads\bin, C:\pthreads\include, C:\pthreads\lib

=== STEP 6 ===
--- Install Python 2.7 and 3.5+ 64-bit.
--- Add PythonXX and PythonXX\Scripts paths to environment variables.

=== STEP 7 ===
--- Install wxPython Phoenix. From a command prompt:
    
py -X.X -m pip install -U wxPython

=== STEP 8 ===
--- Copy PythonXX/vcruntime140.dll in PythonXX/libs/

=== STEP 9 ===
--- Patch PythonXX/Lib/distutils/cygwinccompiler.py to add missing msc_ver:
    
    elif msc_ver == "1700":
        return ['msvcr110']
    elif msc_ver == "1800":
        return ['msvcr120']
    elif msc_ver in ["1900", "1915", "1916"]:
        return ['vcruntime140']

=== STEP 10 ===
--- create a file PythonXX/Lib/distutils/distutils.cfg with these lines in it:

[build]
compiler = mingw32

=== STEP 11 ===
--- Install Git
https://git-scm.com/download/win

=== STEP 12 ===
--- Download pyo sources from git and build it with (in a standard command prompt):

py -X.X setup.py install --use-double