[Bugfix] Prevent definition of HAVE_BOOST without value due to race conditions...

[Bugfix] Prevent definition of HAVE_BOOST without value due to race conditions in some autoconf versions.

For some autoconf versions there was a race condition between ax_boost_base.m4 and dune_boost_base.m4 resulting in HAVE_BOOST being defined with no value (instead of ENABLE_BOOST). For others there were even two definitions of it (one with and one without value). 

This patch renames the symbol being defined in dune_boost_base.m4 to HAVE_DUNE_BOOST and defines a value for it if boost is found.

Please change your code such the preprocessor directives checking for boost from
#if HAVE_BOOST
to
#if HAVE_DUNE_BOOST

Resolves flyspray 1265 and presumably 1249.

[[Imported from SVN: r1895]]

dune/istl/gsetc.hh

@@ -373,7 +373,7 @@ namespace Dune {
   template<int I>
   struct algmeta_itsteps {
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
     template<typename T11, typename T12, typename T13, typename T14,
@@ -422,7 +422,7 @@ namespace Dune {
       x.axpy(K(1)-w,xold);
     }
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
     template<typename T11, typename T12, typename T13, typename T14,
@@ -472,7 +472,7 @@ namespace Dune {
       }
     }
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
     template<typename T11, typename T12, typename T13, typename T14,
@@ -522,7 +522,7 @@ namespace Dune {
       }
     }
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
     template<typename T11, typename T12, typename T13, typename T14,

dune/istl/multitypeblockmatrix.hh

@@ -8,7 +8,7 @@
 
 #include "istlexception.hh"
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
 #include <boost/fusion/sequence.hpp>
@@ -463,5 +463,5 @@ namespace Dune {
 } // end namespace
 
 #endif // HAVE_BOOST_FUSION
-#endif // HAVE_BOOST
+#endif // HAVE_DUNE_BOOST
 #endif

dune/istl/multitypeblockvector.hh

@@ -3,7 +3,7 @@
 #ifndef DUNE_MULTITYPEVECTOR_HH
 #define DUNE_MULTITYPEVECTOR_HH
 
-#if HAVE_BOOST
+#if HAVE_DUNE_BOOST
 #ifdef HAVE_BOOST_FUSION
 
 #include <cmath>
@@ -311,6 +311,6 @@ namespace Dune {
 } // end namespace
 
 #endif // end HAVE_BOOST_FUSION
-#endif // end HAVE_BOOST
+#endif // end HAVE_DUNE_BOOST
 
 #endif