From 76923ebd9afff61d8e5e4889ac23ebf5c430227c Mon Sep 17 00:00:00 2001
From: don bright <hugh.m.bright@gmail.com>
Date: Thu, 20 Dec 2012 15:28:13 -0600
Subject: [PATCH] CGAL<4.0.2 has strange errors with clang. notify user
 explicitly to upgrade.

---
 src/version_check.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/version_check.h b/src/version_check.h
index 92b00db010..a940f6b08a 100644
--- a/src/version_check.h
+++ b/src/version_check.h
@@ -66,6 +66,9 @@ a time, to avoid confusion.
 #warning "."
 #warning "."
 #warning "======================="
+#ifdef __clang__
+#error For Clang to work, CGAL must be >= 4.0.2
+#endif
 #endif // CGAL_VERSION_NR < 10400010000
 #endif //ENABLE_CGAL