From 24aafbde115647b7e599d112d0bcc4f03c3e9b88 Mon Sep 17 00:00:00 2001
From: Gregor Jasny <gjasny@googlemail.com>
Date: Sun, 11 Oct 2015 12:07:25 +0200
Subject: Xcode: Adjust deployment target SDK version to host version

If the automatically selected SDK is newer than the host OS version
and no deployment version has been set then adjust the deployment
version to the host OS version. Otherwise the user won't be able to
launch the executables on the build host.

This is for example a problem on a MacOSX 10.10 host with Xcode 7
which only provides a MacOSX10.11 SDK.
---
 Modules/Platform/Darwin-Initialize.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Modules/Platform/Darwin-Initialize.cmake b/Modules/Platform/Darwin-Initialize.cmake
index 62fb985..a08411b 100644
--- a/Modules/Platform/Darwin-Initialize.cmake
+++ b/Modules/Platform/Darwin-Initialize.cmake
@@ -100,6 +100,10 @@ elseif("${CMAKE_GENERATOR}" MATCHES Xcode
         "Instead using SDK:\n \"${_CMAKE_OSX_SYSROOT_DEFAULT}\"."
         )
     endif()
+    if(NOT CMAKE_OSX_DEPLOYMENT_TARGET AND _CURRENT_OSX_VERSION VERSION_LESS _CMAKE_OSX_DEPLOYMENT_TARGET)
+      set(CMAKE_OSX_DEPLOYMENT_TARGET ${_CURRENT_OSX_VERSION} CACHE STRING
+        "Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value." FORCE)
+    endif()
   else()
     # Assume developer files are in root (such as Xcode 4.5 command-line tools).
     set(_CMAKE_OSX_SYSROOT_DEFAULT "")
-- 
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