Fix some unused-variable warnings with GCC 4.6

test/basicstuff.cpp

@@ -42,11 +42,8 @@ template<typename MatrixType> void basicStuff(const MatrixType& m)
              m2 = MatrixType::Random(rows, cols),
              m3(rows, cols),
              mzero = MatrixType::Zero(rows, cols),
-             identity = Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime>
-                              ::Identity(rows, rows),
              square = Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime>::Random(rows, rows);
   VectorType v1 = VectorType::Random(rows),
-             v2 = VectorType::Random(rows),
              vzero = VectorType::Zero(rows);
   SquareMatrixType sm1 = SquareMatrixType::Random(rows,rows), sm2(rows,rows);
 

test/eigensolver_complex.cpp

@@ -125,4 +125,6 @@ void test_eigensolver_complex()
 
   // Test problem size constructors
   CALL_SUBTEST_5(ComplexEigenSolver<MatrixXf>(s));
+  
+  EIGEN_UNUSED_VARIABLE(s)
 }

test/eigensolver_generic.cpp

@@ -118,4 +118,6 @@ void test_eigensolver_generic()
 
   // Test problem size constructors
   CALL_SUBTEST_5(EigenSolver<MatrixXf>(s));
+  
+  EIGEN_UNUSED_VARIABLE(s)
 }

test/eigensolver_selfadjoint.cpp

@@ -204,5 +204,7 @@ void test_eigensolver_selfadjoint()
   s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
   CALL_SUBTEST_8(SelfAdjointEigenSolver<MatrixXf>(s));
   CALL_SUBTEST_8(Tridiagonalization<MatrixXf>(s));
+  
+  EIGEN_UNUSED_VARIABLE(s)
 }
 

test/linearstructure.cpp

@@ -39,8 +39,7 @@ template<typename MatrixType> void linearStructure(const MatrixType& m)
   // to test it, hence I consider that we will have tested Random.h
   MatrixType m1 = MatrixType::Random(rows, cols),
              m2 = MatrixType::Random(rows, cols),
-             m3(rows, cols),
-             mzero = MatrixType::Zero(rows, cols);
+             m3(rows, cols);
 
   Scalar s1 = internal::random<Scalar>();
   while (internal::abs(s1)<1e-3) s1 = internal::random<Scalar>();