From ff4ba46607561c3993b1d679bb26f9db99565ebe Mon Sep 17 00:00:00 2001
From: bangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Wed, 30 Jun 2010 20:41:53 +0000
Subject: [PATCH] Take over patch 21420 from mainline.

git-svn-id: https://svn.dealii.org/branches/releases/Branch-6-3@21421 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/deal.II/include/fe/fe_values.h | 54 +++++++++++++++++++++++++-
 deal.II/doc/news/changes.h             | 10 +++++
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/deal.II/deal.II/include/fe/fe_values.h b/deal.II/deal.II/include/fe/fe_values.h
index e0d00fe664..41a8dc7a5f 100644
--- a/deal.II/deal.II/include/fe/fe_values.h
+++ b/deal.II/deal.II/include/fe/fe_values.h
@@ -54,6 +54,58 @@ template <typename Number> class Vector;
 template <typename Number> class BlockVector;
 
 
+namespace internal
+{
+				   /**
+				    * A class whose specialization is
+				    * used to define what type the
+				    * curl of a vector valued function
+				    * corresponds to.
+				    */
+  template <int dim>
+  struct CurlType;
+
+				   /**
+				    * A class whose specialization is
+				    * used to define what type the
+				    * curl of a vector valued function
+				    * corresponds to.
+				    *
+				    * In 1d, the curl is a scalar.
+				    */
+  template <>
+  struct CurlType<1>{
+      typedef Tensor<1,1>     type;
+  };
+
+				   /**
+				    * A class whose specialization is
+				    * used to define what type the
+				    * curl of a vector valued function
+				    * corresponds to.
+				    *
+				    * In 2d, the curl is a scalar.
+				    */
+  template <>
+  struct CurlType<2>{
+      typedef Tensor<1,1>     type;
+  };
+
+				   /**
+				    * A class whose specialization is
+				    * used to define what type the
+				    * curl of a vector valued function
+				    * corresponds to.
+				    *
+				    * In 3d, the curl is a vector.
+				    */
+  template <>
+  struct CurlType<3>{
+      typedef Tensor<1,3>     type;
+  };
+}
+
+
 /**
  * A namespace in which we declare "extractors", i.e. classes that when used
  * as subscripts in operator[] expressions on FEValues, FEFaceValues, and
@@ -510,7 +562,7 @@ namespace FEValuesViews
 					* <code>spacedim=3</code> it is a
 					* <code>Tensor@<1, dim@></code>.
 					*/
-      typedef Tensor<1, (spacedim == 3)? 3 : 1>     curl_type;
+      typedef typename internal::CurlType<spacedim>::type   curl_type;
 
 				       /**
 					* A typedef for the type of second
diff --git a/deal.II/doc/news/changes.h b/deal.II/doc/news/changes.h
index 44c2cdd3e0..c1ef366600 100644
--- a/deal.II/doc/news/changes.h
+++ b/deal.II/doc/news/changes.h
@@ -38,6 +38,16 @@ inconvenience this causes.
 <h3>General</h3>
 
 <ol>
+  <li>
+  <p>Fixed: GCC version 4.0.1 had a bug that prevented it from compiling
+  release 6.3.0 because it apparently had an infinite loop allocating
+  memory when compiling <code>fe_values.cc</code> in optimized mode. This
+  had been fixed in GCC 4.0.2, but some versions of Mac OS X still use
+  this GCC version in their Xcode environment.
+  <br>
+  (WB 2010/06/30)
+  </p>  
+
   <li>
   <p>Fixed: Configuring with an external BOOST version did not work when
   using shared libraries since the test ran in the wrong order with respect
-- 
2.39.5