Add MUS-X plugin (#707)

* add MUS-X plugin

* fix dual inclusion

---------

Co-authored-by: Johannes Rauch <johannes.rauch@actindo.com>

plugins/Makefile

@@ -930,6 +930,11 @@ PLUGIN_FILES += $(filter-out MSM/src/MSM.cpp,$(wildcard MSM/src/*.cpp))
 # modules/types which are present in other plugins
 MSM_CUSTOM = ADSR BlankPanel Delay LFO LowFrequencyOscillator Mult Noise OP VCA VCO sawTable triTable
 
+# --------------------------------------------------------------
+# MUS-X
+
+PLUGIN_FILES += $(filter-out MUS-X/src/plugin.cpp,$(wildcard MUS-X/src/*.cpp))
+
 # --------------------------------------------------------------
 # myth-modules
 
@@ -2621,6 +2626,13 @@ $(BUILD_DIR)/MSM/%.cpp.o: MSM/%.cpp
 		$(foreach m,$(MSM_CUSTOM),$(call custom_module_names,$(m),MSM)) \
 		-DpluginInstance=pluginInstance__MSM
 
+$(BUILD_DIR)/MUS-X/%.cpp.o: MUS-X/%.cpp
+	-@mkdir -p "$(shell dirname $(BUILD_DIR)/$<)"
+	@echo "Compiling $<"
+	$(SILENT)$(CXX) $< $(BUILD_CXX_FLAGS) -c -o $@ \
+		$(foreach m,$(MUS_X_CUSTOM),$(call custom_module_names,$(m),MUS_X)) \
+		-DpluginInstance=pluginInstance__MUS_X
+
 $(BUILD_DIR)/myth-modules/%.cpp.o: myth-modules/%.cpp
 	-@mkdir -p "$(shell dirname $(BUILD_DIR)/$<)"
 	@echo "Compiling $<"