Porting fixes.

diff --git a/server/trace.c b/server/trace.c
index 1dd85f1..5069534 100644
--- a/server/trace.c
+++ b/server/trace.c
@@ -24,7 +24,11 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <sys/types.h>
+
+#ifdef HAVE_SYS_UIO_H
 #include <sys/uio.h>
+#endif
+
 
 #include "windef.h"
 #include "winbase.h"