From 167fe991d621ce6db09bc99459ec094fb403a8df Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Sat, 5 Sep 2009 13:32:05 +0000
Subject: Handle zero size for posix_memalign. Return NULL or unique address
 according to the 'V' option.

PR:	standards/138307
MFC after:	1 week
---
 lib/libc/stdlib/malloc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/libc/stdlib/malloc.c')

diff --git a/lib/libc/stdlib/malloc.c b/lib/libc/stdlib/malloc.c
index 270d641..b56b003 100644
--- a/lib/libc/stdlib/malloc.c
+++ b/lib/libc/stdlib/malloc.c
@@ -5320,6 +5320,15 @@ posix_memalign(void **memptr, size_t alignment, size_t size)
 			goto RETURN;
 		}
 
+		if (size == 0) {
+			if (opt_sysv == false)
+				size = 1;
+			else {
+				result = NULL;
+				ret = 0;
+				goto RETURN;
+			}
+		}
 		result = ipalloc(alignment, size);
 	}
 
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