--- /dev/null
+++ Libc/Libc-763.12/gen/FreeBSD/lockf.c.patch
@@ -0,0 +1,45 @@
+--- lockf.c.orig	2009-11-07 15:52:44.000000000 -0800
++++ lockf.c	2009-11-07 16:04:57.000000000 -0800
+@@ -31,6 +31,13 @@
+ #include <sys/cdefs.h>
+ __FBSDID("$FreeBSD: src/lib/libc/gen/lockf.c,v 1.10 2009/03/04 01:01:26 delphij 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>
+@@ -62,9 +69,14 @@ lockf(int filedes, int function, off_t s
+ 		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);
+-		if (fl.l_type == F_UNLCK || (fl.l_sysid == 0 && fl.l_pid == getpid()))
++#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;
+ 		return (-1);
+@@ -75,5 +87,10 @@ lockf(int filedes, int function, off_t s
+ 		/* 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 */
+ }
++