linux_ioctl_socket.c: convert to C++

Signed-off-by: Avi Kivity <avi@cloudius-systems.com>

bsd/sys/compat/linux/linux_ioctl.c → bsd/sys/compat/linux/linux_ioctl.cc

@@ -50,7 +50,7 @@
 #include <osv/ioctl.h>
 #include <sys/ioctl.h>
 
-extern int soo_ioctl(struct file *fp, u_long cmd, void *data);
+extern "C" int soo_ioctl(struct file *fp, u_long cmd, void *data);
 
 /*
  * Implement the SIOCGIFCONF ioctl
@@ -226,6 +226,8 @@ linux_to_bsd_ifreq(struct bsd_ifreq *ifr_p)
  * Socket related ioctls
  */
 
+extern "C" int linux_ioctl_socket(struct file *fp, u_long cmd, void *data);
+
 int
 linux_ioctl_socket(struct file *fp, u_long cmd, void *data)
 {