Building BDC-SVD templates OOMs on 32 Bit ARM hardware

Adding conditional with fallback to Jacobi-SVD

src/shogun/mathematics/linalg/backend/eigen/Decompositions.cpp

@@ -141,7 +141,14 @@ void LinalgBackendEigen::svd_impl(
 	{
 	case linalg::SVDAlgorithm::BidiagonalDivideConquer:
 	{
-#if EIGEN_VERSION_AT_LEAST(3, 3, 0)
+// Building BDC-SVD templates OOMs on 32 Bit ARM hardware
+#if	(defined(__arm__) || defined (__thumb__) || defined(__TARGET_ARCH_ARM) || \
+	 defined(__TARGET_ARCH_THUMB) || defined (_ARM) || defined(_M_ARM) || \
+	 defined(_M_ARMT) || defined(__arm))) && !defined(__aarch64__)
+		SG_SWARNING(
+		    "BDC-SVD is not supported on 32 Bit ARM hardware.\n"
+		    "Falling back on Jacobi-SVD.\n")
+#elif EIGEN_VERSION_AT_LEAST(3, 3, 0)
 		auto svd_eig =
 		    A_eig.bdcSvd(thin_U ? Eigen::ComputeThinU : Eigen::ComputeFullU);
 		s_eig = svd_eig.singularValues().template cast<T>();