--- /dev/null
+++ Libc/Libc-583/gen/FreeBSD/lockf.c.patch
@@ -0,0 +1,51 @@
+--- lockf.c.orig	2006-09-16 19:12:39.000000000 -0700
++++ lockf.c	2006-09-16 20:35:36.000000000 -0700
+@@ -38,6 +38,13 @@
+ #include <sys/cdefs.h>
+ __FBSDID("$FreeBSD: src/lib/libc/gen/lockf.c,v 1.8 2002/02/01 00:57:29 obrien Exp $");
+ 
++#ifdef VARIANT_CANCELABLE
++int __fcntl(int, int, void *);
++#else /* !VARIANT_CANCELABLE */
++int __fcntl_nocancel(int, int, void *);
++#endif /* VARIANT_CANCELABLE */
++
++
+ #include "namespace.h"
+ #include <errno.h>
+ #include <fcntl.h>
+@@ -53,6 +60,7 @@
+ 	struct flock fl;
+ 	int cmd;
+ 
++
+ 	fl.l_start = 0;
+ 	fl.l_len = size;
+ 	fl.l_whence = SEEK_CUR;
+@@ -72,8 +80,13 @@
+ 		break;
+ 	case F_TEST:
+ 		fl.l_type = F_WRLCK;
+-		if (_fcntl(filedes, F_GETLK, &fl) == -1)
++#ifdef VARIANT_CANCELABLE
++		if (__fcntl(filedes, F_GETLK, &fl) == -1)
+ 			return (-1);
++#else /* !VARIANT_CANCELABLE */
++		if (__fcntl_nocancel(filedes, F_GETLK, &fl) == -1)
++			return (-1);
++#endif /* VARIANT_CANCELABLE */
+ 		if (fl.l_type == F_UNLCK || fl.l_pid == getpid())
+ 			return (0);
+ 		errno = EAGAIN;
+@@ -85,5 +98,10 @@
+ 		/* NOTREACHED */
+ 	}
+ 
+-	return (_fcntl(filedes, cmd, &fl));
++#ifdef VARIANT_CANCELABLE
++        return (__fcntl(filedes, cmd, &fl));
++#else /* !VARIANT_CANCELABLE */
++        return (__fcntl_nocancel(filedes, cmd, &fl));
++#endif /* VARIANT_CANCELABLE */
+ }
++