title: Xcode 9 macos deployment target (with c++) giving error
body: <p>When I try building a make project (from a c++ repository) I get the following error in XCode 9 : "MacBook Pro runs macOS 10.12.6, which is lower than program’s minimum deployment target. Change your project’s minimum deployment target or upgrade MacBook Pro’s version of macOS."</p>
  
  <p>I tried setting MAC_OS_DEPLOYMENT_TARGET and MAC_OSX_DEPLOYMENT_TARGET to no avail.</p>
  
  <p>I really would appreciate any help as I'm banging my head against the wall trying to figure this out.  It worked in XCode 8 as far as I remember.</p>