On non-x64, load plugins from `plugins-CPU` dir. Remove "-CPU" from plugin binary filename.

plugin.mk

@@ -24,10 +24,6 @@ LDFLAGS += -L$(RACK_DIR) -lRack
 include $(RACK_DIR)/arch.mk
 
 TARGET := plugin
-ifndef ARCH_X64
-	# On non-x64, append CPU name to plugin binary
-	TARGET := $(TARGET)-$(ARCH_CPU)
-endif
 
 ifdef ARCH_LIN
 	TARGET := $(TARGET).so
@@ -52,6 +48,11 @@ ifdef ARCH_WIN
 	RACK_USER_DIR ?= $(USERPROFILE)/Documents/Rack2
 endif
 
+PLUGINS_DIR := $(RACK_USER_DIR)/plugins
+ifndef ARCH_X64
+	# On non-x64, append CPU name to plugins dir
+	PLUGINS_DIR := $(PLUGINS_DIR)-$(ARCH_CPU)
+endif
 
 DEP_FLAGS += -fPIC
 include $(RACK_DIR)/dep.mk
@@ -88,8 +89,8 @@ endif
 	cd dist && tar -c $(SLUG) | zstd -$(ZSTD_COMPRESSION_LEVEL) -o "$(SLUG)"-"$(VERSION)"-$(ARCH_NAME).vcvplugin
 
 install: dist
-	mkdir -p "$(RACK_USER_DIR)"/plugins/
-	cp dist/*.vcvplugin "$(RACK_USER_DIR)"/plugins/
+	mkdir -p "$(PLUGINS_DIR)"
+	cp dist/*.vcvplugin "$(PLUGINS_DIR)"/
 
 .PHONY: clean dist
 .DEFAULT_GOAL := all

src/plugin.cpp

@@ -103,14 +103,7 @@ static InitCallback loadPluginCallback(Plugin* plugin) {
 	libraryExt = "dylib";
 #endif
 
-#if defined ARCH_X64
-	// Use `plugin.EXT` on x64 for backward compatibility.
-	// Change to `plugin-OS-CPU.EXT` in Rack 3.
 	std::string libraryFilename = "plugin." + libraryExt;
-#else
-	// Use `plugin-CPU.EXT` on other CPUs like ARM64
-	std::string libraryFilename = "plugin-" + APP_CPU + "." + libraryExt;
-#endif
 	std::string libraryPath = system::join(plugin->path, libraryFilename);
 
 	// Check file existence
@@ -260,9 +253,14 @@ void init() {
 	// Load Core
 	loadPlugin("");
 
-	pluginsPath = asset::user("plugins");
-
 	// Get user plugins directory
+	pluginsPath = asset::user("plugins");
+	// Use `plugins-CPU` dir on non-x64 platforms
+#if !defined ARCH_X64
+	if (!settings::devMode) {
+		pluginsPath += "-" + APP_CPU;
+	}
+#endif
 	system::createDirectory(pluginsPath);
 
 	// Don't load plugins if safe mode is enabled