diff --git a/BasiliskII/src/SDL/video_sdl.cpp b/BasiliskII/src/SDL/video_sdl.cpp
index 9a218082..77c102bc 100644
--- a/BasiliskII/src/SDL/video_sdl.cpp
+++ b/BasiliskII/src/SDL/video_sdl.cpp
@@ -343,12 +343,6 @@ static void ErrorAlert(int error)
 {
 	ErrorAlert(GetString(error));
 }
-
-// Display warning alert
-static void WarningAlert(int warning)
-{
-	WarningAlert(GetString(warning));
-}
 #endif
 
 
@@ -387,26 +381,6 @@ static int palette_size(int mode)
 	}
 }
 
-// Return bytes per pixel for requested depth
-static inline int bytes_per_pixel(int depth)
-{
-	int bpp;
-	switch (depth) {
-	case 8:
-		bpp = 1;
-		break;
-	case 15: case 16:
-		bpp = 2;
-		break;
-	case 24: case 32:
-		bpp = 4;
-		break;
-	default:
-		abort();
-	}
-	return bpp;
-}
-
 // Map video_mode depth ID to numerical depth value
 static int mac_depth_of_video_depth(int video_depth)
 {
@@ -690,7 +664,7 @@ void driver_base::init()
 
 	// Check whether we can initialize the VOSF subsystem and it's profitable
 	if (!video_vosf_init(monitor)) {
-		WarningAlert(STR_VOSF_INIT_ERR);
+		WarningAlert(GetString(STR_VOSF_INIT_ERR));
 		use_vosf = false;
 	}
 	else if (!video_vosf_profitable()) {
diff --git a/BasiliskII/src/Unix/bincue_unix.cpp b/BasiliskII/src/Unix/bincue_unix.cpp
index 11c93548..b20b8543 100644
--- a/BasiliskII/src/Unix/bincue_unix.cpp
+++ b/BasiliskII/src/Unix/bincue_unix.cpp
@@ -799,9 +799,9 @@ static uint8 *fill_buffer(int stream_len)
 #ifdef USE_SDL_AUDIO
 void MixAudio_bincue(uint8 *stream, int stream_len)
 {
-	uint8 *buf;
 	if (audio_enabled && (player.audiostatus == CDROM_AUDIO_PLAY)) {
-		if (buf = fill_buffer(stream_len))
+		uint8 *buf = fill_buffer(stream_len);
+		if (buf)
 			SDL_MixAudio(stream, buf, stream_len, SDL_MIX_MAXVOLUME);
 	}
 }
diff --git a/BasiliskII/src/Unix/rpc_unix.cpp b/BasiliskII/src/Unix/rpc_unix.cpp
index 378c5dd6..ec76e2e2 100644
--- a/BasiliskII/src/Unix/rpc_unix.cpp
+++ b/BasiliskII/src/Unix/rpc_unix.cpp
@@ -433,7 +433,9 @@ static struct {
   int last;
   int count;
 } g_message_descriptors = { NULL, 0, 0 };
+#ifdef USE_THREADS
 static pthread_mutex_t g_message_descriptors_lock = PTHREAD_MUTEX_INITIALIZER;
+#endif
 
 // Add a user-defined marshaler
 static int rpc_message_add_callback(const rpc_message_descriptor_t *desc)
diff --git a/BasiliskII/src/slirp/ip_icmp.c b/BasiliskII/src/slirp/ip_icmp.c
index 75a4614a..55376a8b 100644
--- a/BasiliskII/src/slirp/ip_icmp.c
+++ b/BasiliskII/src/slirp/ip_icmp.c
@@ -77,7 +77,7 @@ icmp_input(m, hlen)
 	
   DEBUG_CALL("icmp_input");
   DEBUG_ARG("m = %lx", (long )m);
-  DEBUG_ARG("m_len = %d", m->m_len);
+  DEBUG_ARG("m_len = %zu", m->m_len);
 
   icmpstat.icps_received++;
 	
@@ -201,12 +201,12 @@ end_error:
 
 #define ICMP_MAXDATALEN (IP_MSS-28)
 void
-icmp_error(msrc, type, code, minsize, message)
-     struct mbuf *msrc;
-     u_char type;
-     u_char code;
-     int minsize;
-     char *message;
+icmp_error(
+     struct mbuf *msrc,
+     u_char type,
+     u_char code,
+     int minsize,
+     char *message)
 {
   unsigned hlen, shlen, s_ip_len;
   register struct ip *ip;
@@ -215,7 +215,7 @@ icmp_error(msrc, type, code, minsize, message)
 
   DEBUG_CALL("icmp_error");
   DEBUG_ARG("msrc = %lx", (long )msrc);
-  DEBUG_ARG("msrc_len = %d", msrc->m_len);
+  DEBUG_ARG("msrc_len = %zu", msrc->m_len);
 
   if(type!=ICMP_UNREACH && type!=ICMP_TIMXCEED) goto end_error;
 
diff --git a/BasiliskII/src/slirp/ip_input.c b/BasiliskII/src/slirp/ip_input.c
index d9426997..cac8493b 100644
--- a/BasiliskII/src/slirp/ip_input.c
+++ b/BasiliskII/src/slirp/ip_input.c
@@ -72,7 +72,7 @@ ip_input(m)
 	
 	DEBUG_CALL("ip_input");
 	DEBUG_ARG("m = %lx", (long)m);
-	DEBUG_ARG("m_len = %d", m->m_len);
+	DEBUG_ARG("m_len = %zu", m->m_len);
 
 	ipstat.ips_total++;
 	
diff --git a/BasiliskII/src/slirp/sbuf.c b/BasiliskII/src/slirp/sbuf.c
index 6af075e7..278e3687 100644
--- a/BasiliskII/src/slirp/sbuf.c
+++ b/BasiliskII/src/slirp/sbuf.c
@@ -71,7 +71,7 @@ void sbappend(struct socket *so, struct mbuf *m)
 	DEBUG_CALL("sbappend");
 	DEBUG_ARG("so = %lx", (long)so);
 	DEBUG_ARG("m = %lx", (long)m);
-	DEBUG_ARG("m->m_len = %d", m->m_len);
+	DEBUG_ARG("m->m_len = %zu", m->m_len);
 	
 	/* Shouldn't happen, but...  e.g. foreign host closes connection */
 	if (m->m_len <= 0) {
diff --git a/BasiliskII/src/slirp/socket.c b/BasiliskII/src/slirp/socket.c
index 2c0e067e..42ba31b2 100644
--- a/BasiliskII/src/slirp/socket.c
+++ b/BasiliskII/src/slirp/socket.c
@@ -454,7 +454,7 @@ sorecvfrom(so)
 		
 	  m->m_len = recvfrom(so->s, m->m_data, len, 0,
 			      (struct sockaddr *)&addr, &addrlen);
-	  DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n", 
+	  DEBUG_MISC((dfd, " did recvfrom %zu, errno = %d-%s\n",
 		      m->m_len, errno,strerror(errno)));
 	  if(m->m_len<0) {
 	    u_char code=ICMP_UNREACH_PORT;
diff --git a/SheepShaver/src/MacOSX/Launcher/DiskType.m b/SheepShaver/src/MacOSX/Launcher/DiskType.m
index ec21d458..d3a4f5c7 100755
--- a/SheepShaver/src/MacOSX/Launcher/DiskType.m
+++ b/SheepShaver/src/MacOSX/Launcher/DiskType.m
@@ -29,7 +29,7 @@
 }
 
 -(NSString*)description {
-	return [NSString stringWithFormat:@"DiskType, path:%@ isCDROM:%@", _path, _isCDROM];
+	return [NSString stringWithFormat:@"DiskType, path:%@ isCDROM:%hhd", _path, _isCDROM];
 }
 
 @end
diff --git a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
index 7d6a599c..dc9043b7 100644
--- a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
+++ b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
@@ -772,7 +772,7 @@ sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip)
 	const uint32 pc = cpu->pc();
 	
 	// Fault in Mac ROM or RAM?
-	bool mac_fault = (pc >= ROMBase) && (pc < (ROMBase + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize)) || (pc >= DR_CACHE_BASE && pc < (DR_CACHE_BASE + DR_CACHE_SIZE));
+	bool mac_fault = (pc >= ROMBase && pc < (ROMBase + ROM_AREA_SIZE)) || (pc >= RAMBase && pc < (RAMBase + RAMSize)) || (pc >= DR_CACHE_BASE && pc < (DR_CACHE_BASE + DR_CACHE_SIZE));
 	if (mac_fault) {
 
 		// "VM settings" during MacOS 8 installation
diff --git a/SheepShaver/src/rom_patches.cpp b/SheepShaver/src/rom_patches.cpp
index 9dcd826a..83d6f17d 100644
--- a/SheepShaver/src/rom_patches.cpp
+++ b/SheepShaver/src/rom_patches.cpp
@@ -664,23 +664,6 @@ static const uint8 adbop_patch[] = {	// Call ADBOp() completion procedure
 };
 
 
-/*
- *  Copy PowerPC code to ROM image and reverse bytes if necessary
- */
-
-static inline void memcpy_powerpc_code(void *dst, const void *src, size_t len)
-{
-#ifdef WORDS_BIGENDIAN
-	(void)memcpy(dst, src, len);
-#else
-	uint32 *d = (uint32 *)dst;
-	uint32 *s = (uint32 *)src;
-	for (int i = 0; i < len/4; i++)
-		d[i] = htonl(s[i]);
-#endif
-}
-
-
 /*
  *  Install ROM patches (RAMBase and KernelDataAddr must be set)
  */