From 22cc44d6b63e070cbff9770497f4fe6b3fa8d2a5 Mon Sep 17 00:00:00 2001
From: Orgad Shaneh <orgads@gmail.com>
Date: Sun, 31 Jul 2016 09:18:22 +0300
Subject: [PATCH] mklink: Do not needlessly overwrite linked files...

... on systems without symlinks.

Overwriting all the headers on each Configure causes full rebuild even if
nothing has changed.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1370)
---
 util/mklink.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/mklink.pl b/util/mklink.pl
index 61db12c68f..2df0453a17 100755
--- a/util/mklink.pl
+++ b/util/mklink.pl
@@ -57,7 +57,7 @@ foreach $file (@files) {
     if ($symlink_exists) {
 	unlink "$from/$file";
 	symlink("$to/$file", "$from/$file") or $err = " [$!]";
-    } else {
+    } elsif (-d "$from" && (!-f "$from/$file" || ((stat("$file"))[9] > (stat("$from/$file"))[9]))) {
 	unlink "$from/$file"; 
 	open (OLD, "<$file") or die "Can't open $file: $!";
 	open (NEW, ">$from/$file") or die "Can't open $from/$file: $!";
-- 
2.25.1