From 54b824d1f4441b7d9c40f3ace1d91447e4bae882 Mon Sep 17 00:00:00 2001
From: "Yichun Zhang (agentzh)" <agentzh@gmail.com>
Date: Sat, 19 Dec 2015 11:48:21 -0800
Subject: [PATCH] ./configure: now we automatically set the env
 MACOSX_DEPLOYMENT_TARGET to the current Mac OS X version unless the env is
 already set. thanks bsyk for the report in #3.

---
 util/configure | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/util/configure b/util/configure
index be7b42f..1fa0018 100755
--- a/util/configure
+++ b/util/configure
@@ -622,6 +622,17 @@ _END_
             $extra_opts .= " CC=cc";
         }
 
+        if ($platform eq 'macosx') {
+            my $v = $ENV{MACOSX_DEPLOYMENT_TARGET};
+            if (!defined $v || $v !~ /^\d+\.\d+$/) {
+                $v = `sw_vers -productVersion`;
+                if (defined $v && $v =~ /^\s*(\d+\.\d+)/) {
+                    $ENV{MACOSX_DEPLOYMENT_TARGET} = $1;
+                    #warn "MACOSX_DEPLOYMENT_TARGET = $1";
+                }
+            }
+        }
+
         if (defined $cores) {
             shell "${make} -j$cores$extra_opts PREFIX=$luajit_prefix", $dry_run;
         } else {