FS-7653 Thanks to Mike Jerris who wrote up the build system files for this.

build/standalone_module/Makefile.am

+AUTOMAKE_OPTIONS = foreign subdir-objects
+
+mod_LTLIBRARIES = mod_skel.la
+mod_skel_la_SOURCES  = mod_skel.c
+mod_skel_la_CFLAGS   = $(FREESWITCH_CFLAGS)
+mod_skel_la_LDFLAGS  = -avoid-version -module -no-undefined -shared $(FREESWITCH_LDFLAGS)

build/standalone_module/README

+This is a sample build system for a stand alone FreeSWITCH module.
+
+To build and install:
+./bootstrap.sh
+./configure
+make
+make install

build/standalone_module/bootstrap.sh

+#!/bin/bash
+autoreconf -i

build/standalone_module/configure.ac

+AC_INIT([freeswitch_standalone_module], [1.7.0], bugs@freeswitch.org)
+
+AM_INIT_AUTOMAKE
+
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+AM_PROG_CC_C_O
+
+AC_PROG_LIBTOOL
+
+PKG_CHECK_MODULES([FREESWITCH],[freeswitch],[],[])
+PKG_CHECK_VAR([moddir],[freeswitch],[modulesdir])
+
+AC_SUBST(FREESWITCH_CFLAGS)
+AC_SUBST(FREESWITCH_LDFLAGS)
+AC_SUBST(moddir)
+
+AC_CONFIG_FILES([Makefile])
+
+AC_OUTPUT

build/standalone_module/mod_skel.c

+/* 
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ *
+ * The Initial Developer of the Original Code is
+ * Anthony Minessale II <anthm@freeswitch.org>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * 
+ * Anthony Minessale II <anthm@freeswitch.org>
+ * Neal Horman <neal at wanlink dot com>
+ *
+ *
+ * mod_skel.c -- Framework Demo Module
+ *
+ */
+#include <switch.h>
+
+/* Prototypes */
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_skel_shutdown);
+SWITCH_MODULE_RUNTIME_FUNCTION(mod_skel_runtime);
+SWITCH_MODULE_LOAD_FUNCTION(mod_skel_load);
+
+/* SWITCH_MODULE_DEFINITION(name, load, shutdown, runtime) 
+ * Defines a switch_loadable_module_function_table_t and a static const char[] modname
+ */
+SWITCH_MODULE_DEFINITION(mod_skel, mod_skel_load, mod_skel_shutdown, NULL);
+
+typedef enum {
+	CODEC_NEGOTIATION_GREEDY = 1,
+	CODEC_NEGOTIATION_GENEROUS = 2,
+	CODEC_NEGOTIATION_EVIL = 3
+} codec_negotiation_t;
+
+static struct {
+	char *codec_negotiation_str;
+	codec_negotiation_t codec_negotiation;
+	switch_bool_t sip_trace;
+	int integer;
+} globals;
+
+static switch_status_t config_callback_siptrace(switch_xml_config_item_t *data, switch_config_callback_type_t callback_type, switch_bool_t changed)
+{
+	switch_bool_t value = *(switch_bool_t *) data->ptr;
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "In siptrace callback: value %s changed %s\n",
+					  value ? "true" : "false", changed ? "true" : "false");
+
+
+	/*
+	   if ((callback_type == CONFIG_LOG || callback_type == CONFIG_RELOAD) && changed) {
+	   nua_set_params(((sofia_profile_t*)data->functiondata)->nua, TPTAG_LOG(value), TAG_END());
+	   } 
+	 */
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_xml_config_string_options_t config_opt_codec_negotiation = { NULL, 0, "greedy|generous|evil" };
+
+/* enforce_min, min, enforce_max, max */
+static switch_xml_config_int_options_t config_opt_integer = { SWITCH_TRUE, 0, SWITCH_TRUE, 10 };
+static switch_xml_config_enum_item_t config_opt_codec_negotiation_enum[] = {
+	{"greedy", CODEC_NEGOTIATION_GREEDY},
+	{"generous", CODEC_NEGOTIATION_GENEROUS},
+	{"evil", CODEC_NEGOTIATION_EVIL},
+	{NULL, 0}
+};
+
+static switch_xml_config_item_t instructions[] = {
+	/* parameter name        type                 reloadable   pointer                         default value     options structure */
+	SWITCH_CONFIG_ITEM("codec-negotiation-str", SWITCH_CONFIG_STRING, CONFIG_RELOADABLE, &globals.codec_negotiation_str, "greedy",
+					   &config_opt_codec_negotiation,
+					   "greedy|generous|evil", "Specifies the codec negotiation scheme to be used."),
+	SWITCH_CONFIG_ITEM("codec-negotiation", SWITCH_CONFIG_ENUM, CONFIG_RELOADABLE, &globals.codec_negotiation, (void *) CODEC_NEGOTIATION_GREEDY,
+					   &config_opt_codec_negotiation_enum,
+					   "greedy|generous|evil", "Specifies the codec negotiation scheme to be used."),
+	SWITCH_CONFIG_ITEM_CALLBACK("sip-trace", SWITCH_CONFIG_BOOL, CONFIG_RELOADABLE, &globals.sip_trace, (void *) SWITCH_FALSE,
+								(switch_xml_config_callback_t) config_callback_siptrace, NULL,
+								"yes|no", "If enabled, print out sip messages on the console."),
+	SWITCH_CONFIG_ITEM("integer", SWITCH_CONFIG_INT, CONFIG_RELOADABLE, &globals.integer, (void *) 100, &config_opt_integer,
+					   NULL, NULL),
+	SWITCH_CONFIG_ITEM_END()
+};
+
+static switch_status_t do_config(switch_bool_t reload)
+{
+	memset(&globals, 0, sizeof(globals));
+
+	if (switch_xml_config_parse_module_settings("skel.conf", reload, instructions) != SWITCH_STATUS_SUCCESS) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Could not open skel.conf\n");
+		return SWITCH_STATUS_FALSE;
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+#include "switch_stun.h"
+
+#define _switch_stun_packet_next_attribute(attribute, end) (attribute && (attribute = (switch_stun_packet_attribute_t *) (attribute->value + ntohs(attribute->length))) && ((void *)attribute < end) && ntohs(attribute->length) && ((void *)(attribute + ntohs(attribute->length)) < end))
+
+#define _switch_stun_attribute_padded_length(attribute) ((uint16_t)(ntohs(attribute->length) + (sizeof(uint32_t)-1)) & ~sizeof(uint32_t))
+
+//#define _switch_stun_packet_next_attribute(attribute, end) (attribute && (attribute = (switch_stun_packet_attribute_t *) (attribute->value +  _switch_stun_attribute_padded_length(attribute))) && ((void *)attribute < end) && ((void *)(attribute +  _switch_stun_attribute_padded_length(attribute)) < end))
+
+SWITCH_STANDARD_API(skel_function)
+{
+	switch_event_t *event;
+	unsigned char frame_buffer[8192] = {0};
+	uint8_t buf[256] = { 0 };
+	switch_stun_packet_t *packet;
+	char user_name[] = "0000000000000000:1111111111111111";
+	//char user_name[] = "0000000000000000";
+	void *end_buf;
+	switch_stun_packet_attribute_t *attr;
+	int xlen = 0;
+
+	packet = switch_stun_packet_build_header(SWITCH_STUN_BINDING_REQUEST, NULL, buf);
+
+	printf("1len %d %d\n", ntohs(packet->header.length), xlen);
+
+	switch_stun_packet_attribute_add_username(packet, user_name, strlen(user_name));
+	printf("2len %d %d\n", ntohs(packet->header.length), xlen);
+
+	switch_stun_packet_attribute_add_controlled(packet);
+
+	//switch_stun_packet_attribute_add_password(packet, user_name, strlen(user_name));
+	//printf("3len %d %d\n", ntohs(packet->header.length), xlen);
+
+	//switch_stun_packet_attribute_add_use_candidate(packet);
+
+	switch_stun_packet_attribute_add_integrity(packet, "FUCK");
+	switch_stun_packet_attribute_add_fingerprint(packet);
+
+
+	end_buf = buf + ((sizeof(buf) > packet->header.length) ? packet->header.length : sizeof(buf));
+
+
+
+	switch_stun_packet_first_attribute(packet, attr);
+
+	xlen = sizeof(switch_stun_packet_header_t);
+
+	printf("len %d %d\n", ntohs(packet->header.length), xlen);
+
+	do {
+		printf("WTF %p %d %d:(%d)\n", (void *)attr, ntohs(attr->type), ntohs(attr->length), switch_stun_attribute_padded_length_hbo(attr));
+
+		if (!switch_stun_packet_next_attribute_hbo(attr, end_buf)) {
+			break;
+		}
+
+		xlen += 4+switch_stun_attribute_padded_length_hbo(attr);
+	} while (xlen <= ntohs(packet->header.length));
+
+
+
+
+	return SWITCH_STATUS_SUCCESS;
+
+	do_config(SWITCH_TRUE);
+
+	if (switch_event_create(&event, SWITCH_EVENT_TRAP) == SWITCH_STATUS_SUCCESS) {
+		switch_size_t len = 0;
+		int x = 0;
+
+		/* populate the event with some headers */
+
+		switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "testing", "true");
+		switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "foo", "bar");
+
+		for (x = 0; x < 10; x++) {
+			char name[128];
+			switch_snprintf(name, sizeof(name), "test-header-%d", x);
+			switch_event_add_header(event, SWITCH_STACK_BOTTOM, name, "value-%d", x);
+		}
+		
+
+		/* Nothing up my sleeve, here is the event */
+
+		DUMP_EVENT(event);
+
+
+		/* ok, serialize it into frame_buffer and destroy the event *poof* */
+		len = sizeof(frame_buffer);
+		switch_event_binary_serialize(event, (void *)frame_buffer, &len);
+		switch_event_destroy(&event);
+
+
+		/* wave the magic wand and feed frame_buffer to deserialize */
+		switch_event_binary_deserialize(&event, (void *)frame_buffer, len, SWITCH_FALSE);
+
+		/* TA DA */
+		DUMP_EVENT(event);
+
+		switch_event_destroy(&event);
+	}
+
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static void mycb(switch_core_session_t *session, switch_channel_callstate_t callstate, switch_device_record_t *drec)
+{
+	switch_channel_t *channel = switch_core_session_get_channel(session);
+
+	switch_log_printf(SWITCH_CHANNEL_CHANNEL_LOG(channel), SWITCH_LOG_CRIT, 
+					  "%s device: %s\nState: %s Dev State: %s/%s Total:%u Offhook:%u Active:%u Held:%u Hungup:%u Dur: %u %s\n", 
+					  switch_channel_get_name(channel),
+					  drec->device_id,
+					  switch_channel_callstate2str(callstate),
+					  switch_channel_device_state2str(drec->last_state),
+					  switch_channel_device_state2str(drec->state),
+					  drec->stats.total,
+					  drec->stats.offhook,
+					  drec->stats.active,
+					  drec->stats.held,
+					  drec->stats.hup,
+					  drec->active_stop ? (uint32_t)(drec->active_stop - drec->active_start) / 1000 : 0,
+					  switch_channel_test_flag(channel, CF_FINAL_DEVICE_LEG) ? "FINAL LEG" : "");
+
+}
+
+
+/* Macro expands to: switch_status_t mod_skel_load(switch_loadable_module_interface_t **module_interface, switch_memory_pool_t *pool) */
+SWITCH_MODULE_LOAD_FUNCTION(mod_skel_load)
+{
+	switch_api_interface_t *api_interface;
+	/* connect my internal structure to the blank pointer passed to me */
+	*module_interface = switch_loadable_module_create_module_interface(pool, modname);
+
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "Hello World!\n");
+
+	do_config(SWITCH_FALSE);
+
+	SWITCH_ADD_API(api_interface, "skel", "Skel API", skel_function, "syntax");
+
+	switch_channel_bind_device_state_handler(mycb, NULL);
+
+	/* indicate that the module should continue to be loaded */
+	return SWITCH_STATUS_SUCCESS;
+}
+
+/*
+  Called when the system shuts down
+  Macro expands to: switch_status_t mod_skel_shutdown() */
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_skel_shutdown)
+{
+	/* Cleanup dynamically allocated config settings */
+	switch_channel_unbind_device_state_handler(mycb);
+	switch_xml_config_cleanup(instructions);
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+/*
+  If it exists, this is called in it's own thread when the module-load completes
+  If it returns anything but SWITCH_STATUS_TERM it will be called again automatically
+  Macro expands to: switch_status_t mod_skel_runtime()
+SWITCH_MODULE_RUNTIME_FUNCTION(mod_skel_runtime)
+{
+	while(looping)
+	{
+		switch_cond_next();
+	}
+	return SWITCH_STATUS_TERM;
+}
+*/
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet
+ */