Don't define VERSION in dev builds

Makefile

@@ -74,6 +74,9 @@ include compile.mk
 
 
 dist: all
+ifndef VERSION
+	$(error VERSION must be defined when calling make)
+endif
 	rm -rf dist
 	$(MAKE) -C plugins/Fundamental dist
 

compile.mk

@@ -1,5 +1,6 @@
-VERSION ?= dev
+ifdef VERSION
 FLAGS += -DVERSION=$(VERSION)
+endif
 
 # Generate dependency files alongside the object files
 FLAGS += -MMD

src/app.cpp

@@ -4,7 +4,12 @@
 namespace rack {
 
 std::string gApplicationName = "VCV Rack";
-std::string gApplicationVersion = TOSTRING(VERSION);
+std::string gApplicationVersion =
+#ifdef VERSION
+	TOSTRING(VERSION);
+#else
+	"dev";
+#endif
 std::string gApiHost = "http://api.vcvrack.com";
 
 RackWidget *gRackWidget = NULL;