Fix mingw32 build warnings

Work around buffer and ioctlsocket argument type signedness problems
Suppress a prototype which is unused on mingw32
Expand a macro to avoid warnings from some GCC versions

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

net.c

@@ -665,7 +665,9 @@ static const char *slirp_smb_export;
 #endif
 static VLANClientState *slirp_vc;
 
+#ifndef _WIN32
 static void slirp_smb(const char *exported_dir);
+#endif
 static void slirp_redirection(Monitor *mon, const char *redir_str);
 
 int slirp_can_output(void)
@@ -1505,7 +1507,7 @@ static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf,
 {
     NetSocketState *s = vc->opaque;
 
-    return sendto(s->fd, buf, size, 0,
+    return sendto(s->fd, (void *)buf, size, 0,
                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
 }
 
@@ -1517,7 +1519,7 @@ static void net_socket_send(void *opaque)
     uint8_t buf1[4096];
     const uint8_t *buf;
 
-    size = recv(s->fd, buf1, sizeof(buf1), 0);
+    size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
     if (size < 0) {
         err = socket_error();
         if (err != EWOULDBLOCK)
@@ -1579,7 +1581,7 @@ static void net_socket_send_dgram(void *opaque)
     NetSocketState *s = opaque;
     int size;
 
-    size = recv(s->fd, s->buf, sizeof(s->buf), 0);
+    size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
     if (size < 0)
         return;
     if (size == 0) {

qemu-char.c

@@ -1708,7 +1708,7 @@ static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
 {
     NetCharDriver *s = chr->opaque;
 
-    return sendto(s->fd, buf, len, 0,
+    return sendto(s->fd, (void *)buf, len, 0,
                   (struct sockaddr *)&s->daddr, sizeof(struct sockaddr_in));
 }
 
@@ -1737,7 +1737,7 @@ static void udp_chr_read(void *opaque)
 
     if (s->max_size == 0)
         return;
-    s->bufcnt = recv(s->fd, s->buf, sizeof(s->buf), 0);
+    s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
     s->bufptr = s->bufcnt;
     if (s->bufcnt <= 0)
         return;
@@ -1913,7 +1913,7 @@ static void tcp_chr_read(void *opaque)
     len = sizeof(buf);
     if (len > s->max_size)
         len = s->max_size;
-    size = recv(s->fd, buf, len, 0);
+    size = recv(s->fd, (void *)buf, len, 0);
     if (size == 0) {
         /* connection closed */
         s->connected = 0;

savevm.c

@@ -190,7 +190,7 @@ static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
     ssize_t len;
 
     do {
-        len = recv(s->fd, buf, size, 0);
+        len = recv(s->fd, (void *)buf, size, 0);
     } while (len == -1 && socket_error() == EINTR);
 
     if (len == -1)

slirp/misc.c

@@ -778,7 +778,7 @@ fd_nonblock(int fd)
 {
 #ifdef FIONBIO
 #ifdef _WIN32
-        long opt = 1;
+        unsigned long opt = 1;
 #else
         int opt = 1;
 #endif
@@ -797,7 +797,11 @@ void
 fd_block(int fd)
 {
 #ifdef FIONBIO
+#ifdef _WIN32
+        unsigned long opt = 0;
+#else
 	int opt = 0;
+#endif
 
 	ioctlsocket(fd, FIONBIO, &opt);
 #else

slirp/socket.c

@@ -474,7 +474,12 @@ sorecvfrom(struct socket *so)
 	  udp_detach(so);
 	} else {                            	/* A "normal" UDP packet */
 	  struct mbuf *m;
-	  int len, n;
+          int len;
+#ifdef _WIN32
+          unsigned long n;
+#else
+          int n;
+#endif
 
 	  if (!(m = m_get())) return;
 	  m->m_data += IF_MAXLINKHDR;

target-ppc/op_helper.c

@@ -1974,7 +1974,21 @@ target_ulong helper_dlmzb (target_ulong high, target_ulong low, uint32_t update_
 SATCVT(sh, sb, int16_t, int8_t, INT8_MIN, INT8_MAX, 1, 1)
 SATCVT(sw, sh, int32_t, int16_t, INT16_MIN, INT16_MAX, 1, 1)
 SATCVT(sd, sw, int64_t, int32_t, INT32_MIN, INT32_MAX, 1, 1)
-SATCVT(uh, ub, uint16_t, uint8_t, 0, UINT8_MAX, 0, 1)
+
+/* Work around gcc problems with the macro version */
+static always_inline uint8_t cvtuhub(uint16_t x, int *sat)
+{
+    uint8_t r;
+
+    if (x > UINT8_MAX) {
+        r = UINT8_MAX;
+        *sat = 1;
+    } else {
+        r = x;
+    }
+    return r;
+}
+//SATCVT(uh, ub, uint16_t, uint8_t, 0, UINT8_MAX, 0, 1)
 SATCVT(uw, uh, uint32_t, uint16_t, 0, UINT16_MAX, 0, 1)
 SATCVT(ud, uw, uint64_t, uint32_t, 0, UINT32_MAX, 0, 1)
 SATCVT(sh, ub, int16_t, uint8_t, 0, UINT8_MAX, 1, 1)

vnc.c

@@ -961,7 +961,7 @@ long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
         }
     } else
 #endif /* CONFIG_VNC_TLS */
-        ret = send(vs->csock, data, datalen, 0);
+        ret = send(vs->csock, (void *)data, datalen, 0);
     VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
     return vnc_client_io_error(vs, ret, socket_error());
 }
@@ -1066,7 +1066,7 @@ long vnc_client_read_buf(VncState *vs, uint8_t *data, size_t datalen)
         }
     } else
 #endif /* CONFIG_VNC_TLS */
-        ret = recv(vs->csock, data, datalen, 0);
+        ret = recv(vs->csock, (void *)data, datalen, 0);
     VNC_DEBUG("Read wire %p %zd -> %ld\n", data, datalen, ret);
     return vnc_client_io_error(vs, ret, socket_error());
 }