Merge pull request #12798 from kb2ma/gcoap/init_delay

net/gcoap: add macro to delay initialization of gcoap

sys/auto_init/auto_init.c

@@ -159,8 +159,10 @@ void auto_init(void)
     openthread_bootstrap();
 #endif
 #ifdef MODULE_GCOAP
+    if (!IS_ACTIVE(GCOAP_NO_AUTO_INIT)) {
         DEBUG("Auto init gcoap module.\n");
         gcoap_init();
+    }
 #endif
 #ifdef MODULE_DEVFS
     DEBUG("Mounting /dev\n");

sys/include/net/gcoap.h

@@ -446,6 +446,16 @@ extern "C" {
  */
 #define GCOAP_PAYLOAD_MARKER    (0xFF)
 
+/**
+ * @ingroup net_gcoap_conf
+ * @brief   Disables gcoap startup during system auto init
+ *
+ * If disabled, gcoap_init() must be called by some other means.
+ */
+#ifndef GCOAP_NO_AUTO_INIT
+#define GCOAP_NO_AUTO_INIT      0
+#endif
+
 /**
  * @name    States for the memo used to track waiting for a response
  * @{