#include <unistd.h>
#include <sys/ioctl.h>
+
+// Under older (Open)Solaris versions FIONBIO is declared in this header only.
+// In the newer versions it's included by sys/ioctl.h but it's simpler to just
+// include it always instead of testing for whether it is or not.
+#ifdef __SOLARIS__
+ #include <sys/filio.h>
+#endif
+
#include "wx/private/fdiomanager.h"
class wxSocketImplUnix : public wxSocketImpl,