1 files changed, 10 insertions, 0 deletions
diff --git a/Library/Homebrew/cmd/doctor.rb b/Library/Homebrew/cmd/doctor.rb
index 0786d7c99..39fed18d9 100644
--- a/Library/Homebrew/cmd/doctor.rb
+++ b/Library/Homebrew/cmd/doctor.rb
@@ -925,6 +925,16 @@ def check_os_version
   end
 end
 
+  def check_xcode_license_approved
+    # If the user installs Xcode-only, they have to approve the
+    # license or no "xc*" tool will work.
+    <<-EOS.undent if `/usr/bin/xcrun clang 2>&1` =~ /license/ and not $?.success?
+    You have not agreed to the Xcode license.
+    Builds will fail! Agree to the license by opening Xcode.app or running:
+        xcodebuild -license
+    EOS
+  end
+
 end # end class Checks
 
 module Homebrew extend self