http://bugs.gentoo.org/show_bug.cgi?id=503656#c4
http://github.com/lfranchi/libechonest/pull/14

--- src/CMakeLists.txt
+++ src/CMakeLists.txt
@@ -40,16 +40,8 @@
 
 QT_WRAP_CPP( ${LIBECHONEST_H} )
 
-SET( OS_SPECIFIC_LINK_LIBRARIES "" )
-IF( APPLE OR MINGW )
-  SET( OS_SPECIFIC_LINK_LIBRARIES ${QJSON_LIBRARIES} )
-ELSE( APPLE OR MINGW )
-  SET( OS_SPECIFIC_LINK_LIBRARIES ${QJSON_LDFLAGS} )
-ENDIF( APPLE OR MINGW )
-
-
 add_library( echonest SHARED ${LIBECHONEST_SRC} )
-target_link_libraries( echonest ${OS_SPECIFIC_LINK_LIBRARIES} ${QT_QTCORE_LIBRARY} ${QT_QTNETWORK_LIBRARY}  )
+target_link_libraries( echonest ${QT_QTCORE_LIBRARY} ${QT_QTNETWORK_LIBRARY} ${QJSON_LIBRARIES} )
 set_target_properties( echonest PROPERTIES VERSION ${ECHONEST_LIB_VERSION} SOVERSION ${ECHONEST_LIB_VERSION_SONAME} )
 qt5_use_modules( echonest Core Network Xml )
 install( TARGETS echonest   RUNTIME DESTINATION bin