Installing fluidsynth-mingw-w64, portaudio-mingw-w64, libgig-mingw-w64 from @tobydox's mingw-w64 PPA, the packages are not found during the initial configure step.
OS: Ubuntu 18.04
Using the Ubuntu 18.04 "Bionic" dependencies for mingw
../cmake/build_win64.sh
Supported audio interfaces
--------------------------
* ALSA : <not supported on this platform>
* JACK : <not supported on this platform>
* OSS : <not found or not supported on this platform>
* Sndio :
+ * PortAudio : not found, please install portaudio19-dev (or similar, version >= 1.9) ;if you require PortAudio support
* libsoundio : <disabled in this release>
* PulseAudio : <not supported on this platform>
* SDL : not found, please install libsdl2-dev (or similar) ;if you require SDL support
Optional plugins
----------------
* ZynAddSubFX instrument : OK
* Carla Patchbay & Rack : OK (weak linking enabled)
+ * SoundFont2 player : not found, libfluidsynth-dev (or similar);is highly recommended
+ * GIG player : not found, libgig needed for decoding .gig files
https://github.com/LMMS/lmms/wiki/dependencies-windows was missing some packages on the Bionic install. specifically the c++ compilers and the package that contains
pkg-config. I've updated the doc and the libraries are found now.
@DragonEagle did this correct SF2, GIG, PortAudio for you?
Yes it did. Everything was found
Awesome! Thanks for the contribution!