Backported chromaprint-1.4 API changes based on the fix suggested in:
https://github.com/mixxxdj/mixxx/pull/1073

and the work done by Charlie Gehlin in:
https://bugs.gentoo.org/604528

--- mixxx-2.0.0/src/musicbrainz/chromaprinter.cpp
+++ mixxx-2.0.0/src/musicbrainz/chromaprinter.cpp
@@ -25,6 +25,16 @@
 
 QString ChromaPrinter::calcFingerPrint(const Mixxx::SoundSourcePointer& pSoundSource) {
 
+    // Type declarations of *fprint and *encoded pointers need to account for Chromaprint API version
+    // (void* -> uint32_t*) and (void* -> char*) changed in versions v1.4.0 or later -- alyptik 12/2016
+    #if (CHROMAPRINT_VERSION_MINOR > 3) || (CHROMAPRINT_VERSION_MAJOR > 1)
+	typedef uint32_t* uint32_p;
+	typedef char* char_p;
+    #else
+	typedef void* uint32_p;
+	typedef void* char_p;
+    #endif
+
     // this is worth 2min of audio, multiply by 2 because we have 2 channels
     // AcoustID only stores a fingerprint for the first two minutes of a song
     // on their server so we need only a fingerprint of the first two minutes
@@ -57,12 +67,12 @@
     }
     chromaprint_finish(ctx);
 
-    void* fprint = NULL;
+    uint32_p fprint = NULL;
     int size = 0;
     int ret = chromaprint_get_raw_fingerprint(ctx, &fprint, &size);
     QByteArray fingerprint;
     if (ret == 1) {
-        void* encoded = NULL;
+        char_p encoded = NULL;
         int encoded_size = 0;
         chromaprint_encode_fingerprint(fprint, size,
                                        CHROMAPRINT_ALGORITHM_DEFAULT,