fmit: add portaudioSupport (off by default)

pkgs/applications/audio/fmit/default.nix

···
 { stdenv, fetchFromGitHub, fftw, freeglut, qt5
 , alsaSupport ? true, alsaLib ? null
-, jackSupport ? false, libjack2 ? null }:
+, jackSupport ? false, libjack2 ? null
+, portaudioSupport ? false, portaudio ? null }:
 
 assert alsaSupport -> alsaLib != null;
 assert jackSupport -> libjack2 != null;
+assert portaudioSupport -> portaudio != null;
 
 let version = "1.0.8"; in
 stdenv.mkDerivation {
···
 
   buildInputs = [ fftw freeglut qt5.base qt5.multimedia ]
     ++ stdenv.lib.optional alsaSupport [ alsaLib ]
-    ++ stdenv.lib.optional jackSupport [ libjack2 ];
+    ++ stdenv.lib.optional jackSupport [ libjack2 ]
+    ++ stdenv.lib.optional portaudioSupport [ portaudio ];
 
   configurePhase = ''
     mkdir build
···
     qmake \
       CONFIG+=${stdenv.lib.optionalString alsaSupport "acs_alsa"} \
       CONFIG+=${stdenv.lib.optionalString jackSupport "acs_jack"} \
+      CONFIG+=${stdenv.lib.optionalString portaudioSupport "acs_portaudio"} \
       PREFIX="$out" PREFIXSHORTCUT="$out" \
       ../fmit.pro
   '';