silence warnings from eigen, remove unused code

CMakeLists.txt

@@ -48,7 +48,6 @@ set_source_files_properties( ${COMMON_HEADER} PROPERTIES HEADER_FILE_ONLY 1 )
 
 #disable most warnings from dependent modules
 foreach(_mod ${ALL_DEPENDENCIES})
-dune_module_to_uppercase(_upper_case "${_mod}")
     if(${_mod}_INCLUDE_DIRS)
         foreach( _idir ${${_mod}_INCLUDE_DIRS} )
             add_definitions("-isystem ${_idir}")

dune/gdt/discretizations/default.hh

@@ -415,6 +415,7 @@ public:
       std::abort();
     }
 #else // HAVE_EIGEN
+    (void)solution; // silence warning during compilation
     static_assert(AlwaysFalse<DiscreteSolutionType>::value, "You are missing eigen!");
 #endif // HAVE_EIGEN
   }

dune/gdt/local/fluxes/godunov.hh

@@ -13,7 +13,9 @@
 #include <memory>
 
 #if HAVE_EIGEN
+#include <dune/xt/common/disable_warnings.hh>
 #include <Eigen/Eigenvalues>
+#include<dune/xt/common/reenable_warnings.hh>
 #endif
 
 #include <boost/numeric/conversion/cast.hpp>

dune/gdt/local/fluxes/laxfriedrichs.hh

@@ -13,7 +13,9 @@
 #include <memory>
 
 #if HAVE_EIGEN
+#include <dune/xt/common/disable_warnings.hh>
 #include <Eigen/Eigenvalues>
+#include<dune/xt/common/reenable_warnings.hh>
 #endif
 
 #include <dune/common/dynmatrix.hh>