Index: head/devel/ElectricFence/files/patch-efence.c
===================================================================
--- head/devel/ElectricFence/files/patch-efence.c	(revision 493984)
+++ head/devel/ElectricFence/files/patch-efence.c	(revision 493985)
@@ -1,12 +1,38 @@
---- efence.c.orig	Mon Jan 13 17:24:08 2003
-+++ efence.c	Mon Jan 13 17:22:50 2003
-@@ -271,7 +271,9 @@
- 	char *	string;
- 	Slot *	slot;
+--- efence.c.orig	2019-02-26 17:53:52.941236000 +0100
++++ efence.c	2019-02-26 17:56:18.688752000 +0100
+@@ -38,6 +38,7 @@
+ # include <pthread.h>
+ # include <semaphore.h>
+ #endif
++#include <errno.h>
  
-+#if 0
- 	EF_Print(version);
-+#endif
+ #ifdef	malloc
+ #undef	malloc
+@@ -670,6 +671,27 @@
+ 	release();
  
- #ifdef USE_SEMAPHORE
- 	if (sem_init(&EF_sem, 0, 1) >= 0) {
+ 	return address;
++}
++
++extern C_LINKAGE int
++posix_memalign(void **memptr, size_t alignment, size_t userSize)
++{
++	/*
++	 * Per standard, posix_memalign returns EINVAL when alignment
++	 * is not a power of two or power of sizeof(void*).  efence
++	 * doesn't check the value of alignment in memalign, but then
++	 * again, memalign was never specified very well, and on some
++	 * systems odd alignments could indeed have been allowed.
++	 */
++	if ((alignment & (alignment - 1))
++	    || alignment % sizeof (void *))
++		return EINVAL;
++
++	void *ptr = memalign (alignment, userSize);
++	if (ptr == NULL)
++		return ENOMEM;
++	*memptr = ptr;
++	return 0;
+ }
+ 
+ /*