From 4974a6f21b3e1aee969174fd20e2a68c36237e71 Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Sun, 25 Feb 2018 16:56:26 +0100
Subject: [PATCH] mem_sec.c: relax POSIX requirement.

Even though mlock(2) was standardized in POSIX.1-2001, vendors did
implement it prior that point.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5460)

(cherry picked from commit 5839185cdd9b339ff741da437d964a25e72a3fb6)
---
 crypto/mem_sec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/mem_sec.c b/crypto/mem_sec.c
index b626b3d396..c36e392610 100644
--- a/crypto/mem_sec.c
+++ b/crypto/mem_sec.c
@@ -26,7 +26,9 @@
 
 /* e_os.h includes unistd.h, which defines _POSIX_VERSION */
 #if !defined(OPENSSL_NO_SECURE_MEMORY) && defined(OPENSSL_SYS_UNIX) \
-    && defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
+    && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) \
+         || defined(__sun) || defined(__hpux) || defined(__sgi) \
+         || defined(__osf__) )
 # define IMPLEMENTED
 # include <stdlib.h>
 # include <assert.h>
-- 
2.25.1