[Qemu-trivial] [PATCH v2] net/socket: Fix compiler warning (regression for MinGW)

[Qemu-trivial] [PATCH v2] net/socket: Fix compiler warning (regression for MinGW)

[Stefan Weil]

Add a type cast which was removed by commit
213fd5087e2e4e2da10ad266df0ba950cf7618bf again.

Without it, MinGW compilers complain:

net/socket.c:136: warning:
 pointer targets in passing argument 2 of ‘sendto’ differ in signedness
/usr/lib/gcc/amd64-mingw32msvc/4.4.4/../../../../amd64-mingw32msvc/include/winsock2.h:1313: note:
 expected ‘const char *’ but argument is of type ‘const uint8_t *’

Signed-off-by: Stefan Weil <sw@weilnetz.de>
---

v2:
    Add comment which explains that the type cast is needed for MinGW.

MinGW tries to be compatible with Microsoft's prototypes here
(and those are _not_ POSIX).

Regards
Stefan


 net/socket.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/socket.c b/net/socket.c
index 69aad03..2fefa2e 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -131,7 +131,8 @@ static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf,
     ssize_t ret;
 
     do {
-        ret = sendto(s->fd, buf, size, 0,
+        /* MinGW's sendto is not POSIX and needs the type cast for buf! */
+        ret = sendto(s->fd, (const void *)buf, size, 0,
                      (struct sockaddr *)&s->dgram_dst,
                      sizeof(s->dgram_dst));
     } while (ret == -1 && errno == EINTR);
-- 
1.7.10