GCC 4.4 compatibility: no explicit conversion operators.

src/Math/Test/Matrix3Test.cpp

@@ -200,7 +200,12 @@ void Matrix3Test::convert() {
 
     /* Implicit conversion is not allowed */
     CORRADE_VERIFY(!(std::is_convertible<Mat3, Matrix3>::value));
-    CORRADE_VERIFY(!(std::is_convertible<Matrix3, Mat3>::value));
+    {
+        #ifdef CORRADE_GCC44_COMPATIBILITY
+        CORRADE_EXPECT_FAIL("GCC 4.4 doesn't have explicit conversion operators");
+        #endif
+        CORRADE_VERIFY(!(std::is_convertible<Matrix3, Mat3>::value));
+    }
 }
 
 void Matrix3Test::isRigidTransformation() {

src/Math/Test/Matrix4Test.cpp

@@ -224,7 +224,12 @@ void Matrix4Test::convert() {
 
     /* Implicit conversion is not allowed */
     CORRADE_VERIFY(!(std::is_convertible<Mat4, Matrix4>::value));
-    CORRADE_VERIFY(!(std::is_convertible<Matrix4, Mat4>::value));
+    {
+        #ifdef CORRADE_GCC44_COMPATIBILITY
+        CORRADE_EXPECT_FAIL("GCC 4.4 doesn't have explicit conversion operators");
+        #endif
+        CORRADE_VERIFY(!(std::is_convertible<Matrix4, Mat4>::value));
+    }
 }
 
 void Matrix4Test::isRigidTransformation() {

src/Math/Test/MatrixTest.cpp

@@ -198,7 +198,12 @@ void MatrixTest::convert() {
 
     /* Implicit conversion is not allowed */
     CORRADE_VERIFY(!(std::is_convertible<Mat3, Matrix3>::value));
-    CORRADE_VERIFY(!(std::is_convertible<Matrix3, Mat3>::value));
+    {
+        #ifdef CORRADE_GCC44_COMPATIBILITY
+        CORRADE_EXPECT_FAIL("GCC 4.4 doesn't have explicit conversion operators");
+        #endif
+        CORRADE_VERIFY(!(std::is_convertible<Matrix3, Mat3>::value));
+    }
 }
 
 void MatrixTest::isOrthogonal() {

src/Math/Test/RectangularMatrixTest.cpp

@@ -215,7 +215,12 @@ void RectangularMatrixTest::convert() {
 
     /* Implicit conversion is not allowed */
     CORRADE_VERIFY(!(std::is_convertible<Mat2x3, Matrix2x3>::value));
-    CORRADE_VERIFY(!(std::is_convertible<Matrix2x3, Mat2x3>::value));
+    {
+        #ifdef CORRADE_GCC44_COMPATIBILITY
+        CORRADE_EXPECT_FAIL("GCC 4.4 doesn't have explicit conversion operators");
+        #endif
+        CORRADE_VERIFY(!(std::is_convertible<Matrix2x3, Mat2x3>::value));
+    }
 }
 
 void RectangularMatrixTest::data() {