make targets "loadable"

components/targets/CMakeLists.txt

@@ -1,13 +1,4 @@
-# This should be made a pure CMake component but as CMake is even
-# more shitty under Windows, backslash in path screws it all
-
-if(CONFIG_MUSE)
-	message("Compiling for MUSE") 
-	set(src_dirs "muse")
-else()
-	set(src_dirs ".")		
-endif()
-
-idf_component_register( SRC_DIRS ${src_dirs}    				  
+idf_component_register( SRC_DIRS . muse
+			INCLUDE_DIRS .
 					    PRIV_REQUIRES services
 )

components/targets/init.c

@@ -1,3 +0,0 @@
-// weak should do the job but it does not...
- __attribute__((weak)) void target_init(void) { 
-}

components/targets/muse/muse.c

@@ -10,6 +10,7 @@
 //#include <driver/adc.h>
 #include "driver/rmt.h"
 #include "monitor.h"
+#include "targets.h"
 
 /////////////////////////////////////////////////////////////////
 //*********************** NeoPixels  ***************************
@@ -44,11 +45,15 @@ static const char TAG[] = "muse";
 
 static void (*battery_handler_chain)(float value);
 static void battery_svc(float value);
+static bool init(void);
 
-void target_init(void) { 
+const struct target_s target_muse = { "muse", init };
+
+static bool init(void) { 
 	battery_handler_chain = battery_handler_svc;
 	battery_handler_svc = battery_svc;
 	ESP_LOGI(TAG, "Initializing for Muse");
+	return true;
 }
 
 static void battery_svc(float value) {

components/targets/targets.c

@@ -0,0 +1,11 @@
+#include "string.h"
+#include "targets.h"
+
+const struct target_s *target_set[] = { &target_muse, NULL };
+
+void target_init(char *target) { 
+	for (int i = 0; target_set[i]; i++) if (strcasestr(target_set[i]->model, target)) {
+		target_set[i]->init();
+		break;
+	}	
+}

components/targets/targets.h

@@ -0,0 +1,22 @@
+/* 
+ *  Squeezelite for esp32
+ *
+ *  (c) Sebastien 2019
+ *      Philippe G. 2019, philippe_44@outlook.com
+ *
+ *  This software is released under the MIT License.
+ *  https://opensource.org/licenses/MIT
+ *
+ */
+ 
+#pragma once 
+ 
+#include "stddef.h" 
+#include "stdbool.h" 
+
+struct target_s {
+	char *model;
+	bool (*init)(void);
+};
+
+extern const struct target_s target_muse;