Fix MinGW32 checking for IPv6.

Signed-off-by: Christian Beier <dontmind@freeshell.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

configure.ac

@@ -703,12 +703,22 @@ AC_ARG_WITH(ipv6,
 [  --without-ipv6          disable IPv6 support],,)
 if test "x$with_ipv6" != "xno"; then
 	AC_CHECK_FUNC(getaddrinfo, AC_DEFINE(IPv6,1),
-		AC_CHECK_LIB(socket, getaddrinfo, AC_DEFINE(IPv6,1)))
+		AC_CHECK_LIB(socket, getaddrinfo, AC_DEFINE(IPv6,1), [
+			AC_MSG_CHECKING([for getaddrinfo in -lws2_32])
+		        LIBS="$LIBS -lws2_32"
+		        AC_TRY_LINK([#include <ws2tcpip.h>], [getaddrinfo(0, 0, 0, 0);], [
+				      AC_DEFINE(IPv6,1)
+		                      AC_MSG_RESULT([yes])
+				      ],
+				    AC_MSG_RESULT([no]))
+                   ]))
 fi
 
+
+
 # Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h sys/timeb.h syslog.h unistd.h])
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h sys/timeb.h syslog.h unistd.h ws2tcpip.h])
 
 # x11vnc only:
 if test "$build_x11vnc" = "yes"; then

libvncclient/sockets.c

@@ -37,6 +37,10 @@
 #define read(sock,buf,len) recv(sock,buf,len,0)
 #define write(sock,buf,len) send(sock,buf,len,0)
 #define socklen_t int
+#ifdef LIBVNCSERVER_HAVE_WS2TCPIP_H
+#undef socklen_t
+#include <ws2tcpip.h>
+#endif
 #else
 #include <sys/socket.h>
 #include <netinet/in.h>