diff --git a/external/regex/regcomp.c b/external/regex/regcomp.c
index 006fe5c..eb6d7a4 100644
--- a/external/regex/regcomp.c
+++ b/external/regex/regcomp.c
@@ -2510,7 +2510,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
     old_tree = NULL;
 
   if (elem->token.type == SUBEXP)
-    postorder (elem, mark_opt_subexp, (void *) (long) elem->token.opr.idx);
+    postorder (elem, mark_opt_subexp, (void *) (ptrdiff_t) elem->token.opr.idx);
 
   tree = create_tree (dfa, elem, NULL, (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
   if (BE (tree == NULL, 0))
@@ -3725,7 +3725,7 @@ create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
 static reg_errcode_t
 mark_opt_subexp (void *extra, bin_tree_t *node)
 {
-  int idx = (int) (long) extra;
+  int idx = (int) (ptrdiff_t) extra;
   if (node->token.type == SUBEXP && node->token.opr.idx == idx)
     node->token.opt_subexp = 1;
 
diff --git a/src/aclients.c b/src/aclients.c
index c51f0e7..b8b2abd 100644
--- a/src/aclients.c
+++ b/src/aclients.c
@@ -283,10 +283,10 @@ int main (int argc, char *argv[])
 
 #if __WIN32__
 	  if (isdigit(port[j][0])) {
-	    client_th[j] = (HANDLE)_beginthreadex (NULL, 0, client_thread_net, (void *)j, 0, NULL);
+	    client_th[j] = (HANDLE)_beginthreadex (NULL, 0, client_thread_net, (void *)(ptrdiff_t)j, 0, NULL);
 	  }
 	  else {
-	    client_th[j] = (HANDLE)_beginthreadex (NULL, 0, client_thread_serial, (void *)j, 0, NULL);
+	    client_th[j] = (HANDLE)_beginthreadex (NULL, 0, client_thread_serial, (void *)(ptrdiff_t)j, 0, NULL);
 	  }
 	  if (client_th[j] == NULL) {
 	    printf ("Internal error: Could not create client thread %d.\n", j);
@@ -294,10 +294,10 @@ int main (int argc, char *argv[])
 	  }
 #else
 	  if (isdigit(port[j][0])) {
-	    e = pthread_create (&client_tid[j], NULL, client_thread_net, (void *)(long)j);
+	    e = pthread_create (&client_tid[j], NULL, client_thread_net, (void *)(ptrdiff_t)j);
 	  }
 	  else {
-	    e = pthread_create (&client_tid[j], NULL, client_thread_serial, (void *)(long)j);
+	    e = pthread_create (&client_tid[j], NULL, client_thread_serial, (void *)(ptrdiff_t)j);
 	  }
 	  if (e != 0) {
 	    perror("Internal error: Could not create client thread.");
@@ -394,7 +394,7 @@ static void * client_thread_net (void *arg)
 	int use_chan = -1;
 
 
-	my_index = (int)(long)arg;
+	my_index = (int)(ptrdiff_t)arg;
 
 #if DEBUGx
         printf ("DEBUG: client_thread_net %d start, port = '%s'\n", my_index, port[my_index]);
@@ -664,7 +664,7 @@ static unsigned __stdcall client_thread_serial (void *arg)
 static void * client_thread_serial (void *arg)	
 #endif	
 {
-	int my_index = (int)(long)arg;
+	int my_index = (int)(ptrdiff_t)arg;
 
 #if __WIN32__
 
diff --git a/src/beacon.c b/src/beacon.c
index 07ea0d0..ddcaf2e 100644
--- a/src/beacon.c
+++ b/src/beacon.c
@@ -383,7 +383,7 @@ void beacon_init (struct audio_s *pmodem, struct misc_config_s *pconfig, struct
 #else
 	  int e;
 
-	  e = pthread_create (&beacon_tid, NULL, beacon_thread, (void *)0);
+	  e = pthread_create (&beacon_tid, NULL, beacon_thread, NULL);
 	  if (e != 0) {
 	    text_color_set(DW_COLOR_ERROR);
 	    perror("Could not create beacon thread");
diff --git a/src/dwgpsd.c b/src/dwgpsd.c
index 8e7643c..6326704 100644
--- a/src/dwgpsd.c
+++ b/src/dwgpsd.c
@@ -193,7 +193,7 @@ int dwgpsd_init (struct misc_config_s *pconfig, int debug)
 
 	gps_stream(&gpsdata, WATCH_ENABLE | WATCH_JSON, NULL);
 
-	e = pthread_create (&read_gps_tid, NULL, read_gpsd_thread, (void *)(long)arg);
+	e = pthread_create (&read_gps_tid, NULL, read_gpsd_thread, (void *)(ptrdiff_t)arg);
 	if (e != 0) {
 	  text_color_set(DW_COLOR_ERROR);
 	  perror("Could not create GPS reader thread");
diff --git a/src/dwgpsnmea.c b/src/dwgpsnmea.c
index 1ccda6d..99209f3 100644
--- a/src/dwgpsnmea.c
+++ b/src/dwgpsnmea.c
@@ -151,7 +151,7 @@ int dwgpsnmea_init (struct misc_config_s *pconfig, int debug)
 
 	if (s_gpsnmea_port_fd != MYFDERROR) {
 #if __WIN32__
-	  read_gps_th = (HANDLE)_beginthreadex (NULL, 0, read_gpsnmea_thread, (void*)(long)s_gpsnmea_port_fd, 0, NULL);
+	  read_gps_th = (HANDLE)_beginthreadex (NULL, 0, read_gpsnmea_thread, (void*)(ptrdiff_t)s_gpsnmea_port_fd, 0, NULL);
 	  if (read_gps_th == NULL) {
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Could not create GPS NMEA listening thread.\n");
@@ -159,7 +159,7 @@ int dwgpsnmea_init (struct misc_config_s *pconfig, int debug)
 	  }
 #else
 	  int e;
-	  e = pthread_create (&read_gps_tid, NULL, read_gpsnmea_thread, (void*)(long)s_gpsnmea_port_fd);
+	  e = pthread_create (&read_gps_tid, NULL, read_gpsnmea_thread, (void*)(ptrdiff_t)s_gpsnmea_port_fd);
 	  if (e != 0) {
 	    text_color_set(DW_COLOR_ERROR);
 	    perror("Could not create GPS NMEA listening thread.");
@@ -216,7 +216,7 @@ static unsigned __stdcall read_gpsnmea_thread (void *arg)
 static void * read_gpsnmea_thread (void *arg)
 #endif
 {
-	MYFDTYPE fd = (MYFDTYPE)(long)arg;
+	MYFDTYPE fd = (MYFDTYPE)(ptrdiff_t)arg;
 
 // Maximum length of message from GPS receiver is 82 according to some people.  
 // Make buffer considerably larger to be safe.
@@ -230,7 +230,7 @@ static void * read_gpsnmea_thread (void *arg)
 
 	if (s_debug >= 2) {
 	  text_color_set(DW_COLOR_DEBUG);
-	  dw_printf ("read_gpsnmea_thread (%d)\n", (int)(long)arg);
+	  dw_printf ("read_gpsnmea_thread (%d)\n", (int)(ptrdiff_t)arg);
 	}
 
 	dwgps_clear (&info);
diff --git a/src/igate.c b/src/igate.c
index aa9f8c1..19ba037 100644
--- a/src/igate.c
+++ b/src/igate.c
@@ -466,7 +466,7 @@ void igate_init (struct audio_s *p_audio_config, struct igate_config_s *p_igate_
 	  return;
 	}
 #else
-	e = pthread_create (&connect_listen_tid, NULL, connnect_thread, (void *)NULL);
+	e = pthread_create (&connect_listen_tid, NULL, connnect_thread, NULL);
 	if (e != 0) {
 	  text_color_set(DW_COLOR_ERROR);
 	  perror("Internal error: Could not create IGate connection thread");
diff --git a/src/kissnet.c b/src/kissnet.c
index ba7aa24..9588347 100644
--- a/src/kissnet.c
+++ b/src/kissnet.c
@@ -231,14 +231,14 @@ void kissnet_init (struct misc_config_s *mc)
  * This waits for a client to connect and sets client_sock[n].
  */
 #if __WIN32__
-	connect_listen_th = (HANDLE)_beginthreadex (NULL, 0, connect_listen_thread, (void *)kiss_port, 0, NULL);
+	connect_listen_th = (HANDLE)_beginthreadex (NULL, 0, connect_listen_thread, (void *)(ptrdiff_t)kiss_port, 0, NULL);
 	if (connect_listen_th == NULL) {
 	  text_color_set(DW_COLOR_ERROR);
 	  dw_printf ("Could not create KISS socket connect listening thread\n");
 	  return;
 	}
 #else
-	e = pthread_create (&connect_listen_tid, NULL, connect_listen_thread, (void *)(long)kiss_port);
+	e = pthread_create (&connect_listen_tid, NULL, connect_listen_thread, (void *)(ptrdiff_t)kiss_port);
 	if (e != 0) {
 	  text_color_set(DW_COLOR_ERROR);
 	  perror("Could not create KISS socket connect listening thread");
@@ -254,14 +254,14 @@ void kissnet_init (struct misc_config_s *mc)
 	for (client = 0; client < MAX_NET_CLIENTS; client++) {
 
 #if __WIN32__
-	  cmd_listen_th[client] = (HANDLE)_beginthreadex (NULL, 0, kissnet_listen_thread, (void*)client, 0, NULL);
+	  cmd_listen_th[client] = (HANDLE)_beginthreadex (NULL, 0, kissnet_listen_thread, (void*)(ptrdiff_t)client, 0, NULL);
 	  if (cmd_listen_th[client] == NULL) {
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Could not create KISS command listening thread for client %d\n", client);
 	    return;
 	  }
 #else
-	  e = pthread_create (&(cmd_listen_tid[client]), NULL, kissnet_listen_thread, (void *)(long)client);
+	  e = pthread_create (&(cmd_listen_tid[client]), NULL, kissnet_listen_thread, (void *)(ptrdiff_t)client);
 	  if (e != 0) {
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Could not create KISS command listening thread for client %d\n", client);
@@ -305,10 +305,10 @@ static THREAD_F connect_listen_thread (void *arg)
 	SOCKET listen_sock;  
 	WSADATA wsadata;
 
-	snprintf (kiss_port_str, sizeof(kiss_port_str), "%d", (int)(long)arg);
+	snprintf (kiss_port_str, sizeof(kiss_port_str), "%d", (int)(ptrdiff_t)arg);
 #if DEBUG
 	text_color_set(DW_COLOR_DEBUG);
-        dw_printf ("DEBUG: kissnet port = %d = '%s'\n", (int)(long)arg, kiss_port_str);
+        dw_printf ("DEBUG: kissnet port = %d = '%s'\n", (int)(ptrdiff_t)arg, kiss_port_str);
 #endif
 	err = WSAStartup (MAKEWORD(2,2), &wsadata);
 	if (err != 0) {
@@ -425,7 +425,7 @@ static THREAD_F connect_listen_thread (void *arg)
 
     	struct sockaddr_in sockaddr; /* Internet socket address stuct */
     	socklen_t sockaddr_size = sizeof(struct sockaddr_in);
-	int kiss_port = (int)(long)arg;
+	int kiss_port = (int)(ptrdiff_t)arg;
 	int listen_sock;  
 	int bcopt = 1;
 
@@ -808,7 +808,7 @@ static THREAD_F kissnet_listen_thread (void *arg)
 	unsigned char ch;
 			
 
-	int client = (int)(long)arg;
+	int client = (int)(ptrdiff_t)arg;
 
 #if DEBUG
 	text_color_set(DW_COLOR_DEBUG);
diff --git a/src/kissutil.c b/src/kissutil.c
index cd1bfb4..6fabc4a 100644
--- a/src/kissutil.c
+++ b/src/kissutil.c
@@ -285,7 +285,7 @@ int main (int argc, char *argv[])
 
 #if __WIN32__
 	if (using_tcp) {
-	  tnc_th = (HANDLE)_beginthreadex (NULL, 0, tnc_listen_net, (void *)99, 0, NULL);
+	  tnc_th = (HANDLE)_beginthreadex (NULL, 0, tnc_listen_net, (void *)(ptrdiff_t)99, 0, NULL);
 	}
 	else {
 	  tnc_th = (HANDLE)_beginthreadex (NULL, 0, tnc_listen_serial, (void *)99, 0, NULL);
@@ -296,10 +296,10 @@ int main (int argc, char *argv[])
 	}
 #else
 	if (using_tcp) {
-	  e = pthread_create (&tnc_tid, NULL, tnc_listen_net, (void *)(long)99);
+	  e = pthread_create (&tnc_tid, NULL, tnc_listen_net, (void *)(ptrdiff_t)99);
 	}
 	else {
-	  e = pthread_create (&tnc_tid, NULL, tnc_listen_serial, (void *)(long)99);
+	  e = pthread_create (&tnc_tid, NULL, tnc_listen_serial, (void *)(ptrdiff_t)99);
 	}
 	if (e != 0) {
 	  perror("Internal error: Could not create TNC listen thread.");
diff --git a/src/log.c b/src/log.c
index 2894bc3..02aab2a 100644
--- a/src/log.c
+++ b/src/log.c
@@ -51,6 +51,10 @@
 #include <unistd.h>
 #include <errno.h>
 
+#if __WIN32__
+#include <direct.h> 	// for _mkdir()
+#endif
+
 #include "ax25_pad.h"
 #include "textcolor.h"
 #include "decode_aprs.h"
diff --git a/src/recv.c b/src/recv.c
index 65f844e..491ea40 100644
--- a/src/recv.c
+++ b/src/recv.c
@@ -160,7 +160,7 @@ void recv_init (struct audio_s *pa)
 #endif
 
 #if __WIN32__
-	    xmit_th[a] = (HANDLE)_beginthreadex (NULL, 0, recv_adev_thread, (void*)(long)a, 0, NULL);
+	    xmit_th[a] = (HANDLE)_beginthreadex (NULL, 0, recv_adev_thread, (void*)(ptrdiff_t)a, 0, NULL);
 	    if (xmit_th[a] == NULL) {
 	      text_color_set(DW_COLOR_ERROR);
 	      dw_printf ("FATAL: Could not create audio receive thread for device %d.\n", a);
@@ -168,7 +168,7 @@ void recv_init (struct audio_s *pa)
 	    }
 #else
 	    int e;
-	    e = pthread_create (&xmit_tid[a], NULL, recv_adev_thread, (void *)(long)a);
+	    e = pthread_create (&xmit_tid[a], NULL, recv_adev_thread, (void *)(ptrdiff_t)a);
 
 	    if (e != 0) {
 	      text_color_set(DW_COLOR_ERROR);
@@ -203,7 +203,7 @@ static unsigned __stdcall recv_adev_thread (void *arg)
 static void * recv_adev_thread (void *arg)
 #endif
 {
-	int a = (int)(long)arg;	// audio device number.
+	int a = (int)(ptrdiff_t)arg;	// audio device number.
 	int eof;
 	
 	/* This audio device can have one (mono) or two (stereo) channels. */
diff --git a/src/server.c b/src/server.c
index 53fd592..6726a91 100644
--- a/src/server.c
+++ b/src/server.c
@@ -461,14 +461,14 @@ void server_init (struct audio_s *audio_config_p, struct misc_config_s *mc)
  * This waits for a client to connect and sets an available client_sock[n].
  */
 #if __WIN32__
-	connect_listen_th = (HANDLE)_beginthreadex (NULL, 0, connect_listen_thread, (void *)(unsigned int)server_port, 0, NULL);
+	connect_listen_th = (HANDLE)_beginthreadex (NULL, 0, connect_listen_thread, (void *)(ptrdiff_t)server_port, 0, NULL);
 	if (connect_listen_th == NULL) {
 	  text_color_set(DW_COLOR_ERROR);
 	  dw_printf ("Could not create AGW connect listening thread\n");
 	  return;
 	}
 #else
-	e = pthread_create (&connect_listen_tid, NULL, connect_listen_thread, (void *)(long)server_port);
+	e = pthread_create (&connect_listen_tid, NULL, connect_listen_thread, (void *)(ptrdiff_t)server_port);
 	if (e != 0) {
 	  text_color_set(DW_COLOR_ERROR);
 	  perror("Could not create AGW connect listening thread");
@@ -484,14 +484,14 @@ void server_init (struct audio_s *audio_config_p, struct misc_config_s *mc)
 	for (client = 0; client < MAX_NET_CLIENTS; client++) {
 
 #if __WIN32__
-	  cmd_listen_th[client] = (HANDLE)_beginthreadex (NULL, 0, cmd_listen_thread, (void*)client, 0, NULL);
+	  cmd_listen_th[client] = (HANDLE)_beginthreadex (NULL, 0, cmd_listen_thread, (void*)(ptrdiff_t)client, 0, NULL);
 	  if (cmd_listen_th[client] == NULL) {
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Could not create AGW command listening thread for client %d\n", client);
 	    return;
 	  }
 #else
-	  e = pthread_create (&cmd_listen_tid[client], NULL, cmd_listen_thread, (void *)(long)client);
+	  e = pthread_create (&cmd_listen_tid[client], NULL, cmd_listen_thread, (void *)(ptrdiff_t)client);
 	  if (e != 0) {
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Could not create AGW command listening thread for client %d\n", client);
@@ -535,10 +535,10 @@ static THREAD_F connect_listen_thread (void *arg)
 	SOCKET listen_sock;  
 	WSADATA wsadata;
 
-	snprintf (server_port_str, sizeof(server_port_str), "%d", (int)(long)arg);
+	snprintf (server_port_str, sizeof(server_port_str), "%d", (int)(ptrdiff_t)arg);
 #if DEBUG
 	text_color_set(DW_COLOR_DEBUG);
-        dw_printf ("DEBUG: serverport = %d = '%s'\n", (int)(long)arg, server_port_str);
+        dw_printf ("DEBUG: serverport = %d = '%s'\n", (int)(ptrdiff_t)arg, server_port_str);
 #endif
 	err = WSAStartup (MAKEWORD(2,2), &wsadata);
 	if (err != 0) {
@@ -658,7 +658,7 @@ static THREAD_F connect_listen_thread (void *arg)
 
     	struct sockaddr_in sockaddr; /* Internet socket address stuct */
     	socklen_t sockaddr_size = sizeof(struct sockaddr_in);
-	int server_port = (int)(long)arg;
+	int server_port = (int)(ptrdiff_t)arg;
 	int listen_sock;  
 	int bcopt = 1;
 
@@ -1265,7 +1265,7 @@ static THREAD_F cmd_listen_thread (void *arg)
 					/* Maximum for 'D': Info part length + 1 */
 	} cmd;
 
-	int client = (int)(long)arg;
+	int client = (int)(ptrdiff_t)arg;
 
 	assert (client >= 0 && client < MAX_NET_CLIENTS);
 
diff --git a/src/xmit.c b/src/xmit.c
index ca96f55..e70e8b4 100644
--- a/src/xmit.c
+++ b/src/xmit.c
@@ -279,7 +279,7 @@ void xmit_init (struct audio_s *p_modem, int debug_xmit_packet)
 
 	  if (p_modem->achan[j].medium == MEDIUM_RADIO) {
 #if __WIN32__
-	    xmit_th[j] = (HANDLE)_beginthreadex (NULL, 0, xmit_thread, (void*)(long)j, 0, NULL);
+	    xmit_th[j] = (HANDLE)_beginthreadex (NULL, 0, xmit_thread, (void*)(ptrdiff_t)j, 0, NULL);
 	    if (xmit_th[j] == NULL) {
 	       text_color_set(DW_COLOR_ERROR);
 	      dw_printf ("Could not create xmit thread %d\n", j);
@@ -310,10 +310,10 @@ void xmit_init (struct audio_s *p_modem, int debug_xmit_packet)
 	      perror("pthread_attr_setschedparam");
 	    }
 	
-	    e = pthread_create (&(xmit_tid[j]), &attr, xmit_thread, (void *)(long)j);
+	    e = pthread_create (&(xmit_tid[j]), &attr, xmit_thread, (void *)(ptrdiff_t)j);
 	    pthread_attr_destroy (&attr);
 #else
-	    e = pthread_create (&(xmit_tid[j]), NULL, xmit_thread, (void *)(long)j);
+	    e = pthread_create (&(xmit_tid[j]), NULL, xmit_thread, (void *)(ptrdiff_t)j);
 #endif
 	    if (e != 0) {
 	      text_color_set(DW_COLOR_ERROR);
@@ -510,7 +510,7 @@ static unsigned __stdcall xmit_thread (void *arg)
 static void * xmit_thread (void *arg)
 #endif
 {
-	int chan = (int)(long)arg; // channel number.
+	int chan = (int)(ptrdiff_t)arg; // channel number.
 	packet_t pp;
 	int prio;
 	int ok;