Index: examples/gc_no_raii/pool-alloc/allocate-malign.c
===================================================================
--- examples/gc_no_raii/pool-alloc/allocate-malign.c	(revision 90152a4860529aff7214be01cd22abd37012cd19)
+++ examples/gc_no_raii/pool-alloc/allocate-malign.c	(revision 90152a4860529aff7214be01cd22abd37012cd19)
@@ -0,0 +1,30 @@
+/*
+ * Allocation functions (posix_malign)
+ *
+ * Copyright (c) 2014, 2015 Gregor Richards
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+static void *allocPool(size_t size, int mustSucceed)
+{
+    void *ret;
+    if ((errno = posix_memalign(&ret, size, size))) {
+        if (mustSucceed) {
+            perror("posix_memalign");
+            abort();
+        }
+        return NULL;
+    }
+    return ret;
+}