diff -aruN SuperLU_4.3.orig/TESTING/ddrive.c SuperLU_4.3/TESTING/ddrive.c
--- SuperLU_4.3.orig/TESTING/ddrive.c	2011-10-27 21:49:47.000000000 +0200
+++ SuperLU_4.3/TESTING/ddrive.c	2012-12-20 22:14:43.026465899 +0100
@@ -11,6 +11,7 @@
  * Purpose:             MAIN test program
  */
 #include <string.h>
+#include <unistd.h>
 #include "slu_ddefs.h"
 
 #define NTESTS    5      /* Number of test types */
diff -aruN SuperLU_4.3.orig/TESTING/sdrive.c SuperLU_4.3/TESTING/sdrive.c
--- SuperLU_4.3.orig/TESTING/sdrive.c	2011-10-27 21:49:47.000000000 +0200
+++ SuperLU_4.3/TESTING/sdrive.c	2012-12-20 22:14:43.030465752 +0100
@@ -11,6 +11,7 @@
  * Purpose:             MAIN test program
  */
 #include <string.h>
+#include <unistd.h>
 #include "slu_sdefs.h"
 
 #define NTESTS    5      /* Number of test types */