diff --git a/sycl/include/CL/sycl/backend_types.hpp b/sycl/include/CL/sycl/backend_types.hpp
index 3db71b8b47485..5e8e57ea70b2e 100644
--- a/sycl/include/CL/sycl/backend_types.hpp
+++ b/sycl/include/CL/sycl/backend_types.hpp
@@ -8,7 +8,9 @@
 
 #pragma once
 
-namespace cl {
+#include <CL/sycl/detail/defines.hpp>
+
+__SYCL_INLINE_NAMESPACE(cl) {
 namespace sycl {
 
 enum class backend { host, opencl, cuda };
@@ -16,4 +18,4 @@ enum class backend { host, opencl, cuda };
 template <backend name, typename SYCLObjectT> struct interop;
 
 } // namespace sycl
-} // namespace cl
\ No newline at end of file
+} // __SYCL_INLINE_NAMESPACE(cl)
diff --git a/sycl/include/CL/sycl/detail/cg.hpp b/sycl/include/CL/sycl/detail/cg.hpp
index 8dbe84d10e209..ebe934468f087 100644
--- a/sycl/include/CL/sycl/detail/cg.hpp
+++ b/sycl/include/CL/sycl/detail/cg.hpp
@@ -78,8 +78,7 @@ class interop_handler {
   template <backend BackendName, typename DataT, int Dims,
             access::mode AccessMode, access::target AccessTarget,
             access::placeholder IsPlaceholder>
-  __SYCL_EXPORT auto
-  getMemImpl(detail::Requirement *Req) const -> typename interop<
+  auto getMemImpl(detail::Requirement *Req) const -> typename interop<
       BackendName,
       accessor<DataT, Dims, AccessMode, AccessTarget, IsPlaceholder>>::type {
     return (typename interop<BackendName,
diff --git a/sycl/plugins/cuda/pi_cuda.cpp b/sycl/plugins/cuda/pi_cuda.cpp
index bbe3bc4442630..af15743438da8 100644
--- a/sycl/plugins/cuda/pi_cuda.cpp
+++ b/sycl/plugins/cuda/pi_cuda.cpp
@@ -12,6 +12,7 @@
 /// \ingroup sycl_pi_cuda
 
 #include <CL/sycl/detail/cuda_definitions.hpp>
+#include <CL/sycl/detail/defines.hpp>
 #include <CL/sycl/detail/pi.hpp>
 #include <pi_cuda.hpp>
 
@@ -229,7 +230,7 @@ int getAttribute(pi_device device, CUdevice_attribute attribute) {
 } // anonymous namespace
 
 /// ------ Error handling, matching OpenCL plugin semantics.
-namespace cl {
+__SYCL_INLINE_NAMESPACE(cl) {
 namespace sycl {
 namespace detail {
 namespace pi {
@@ -251,7 +252,7 @@ void assertion(bool Condition, const char *Message) {
 } // namespace pi
 } // namespace detail
 } // namespace sycl
-} // namespace cl
+} // __SYCL_INLINE_NAMESPACE(cl)
 
 //--------------
 // PI object implementation
diff --git a/sycl/source/detail/cg.cpp b/sycl/source/detail/cg.cpp
index 2441d1cb7e919..a9a226dee277f 100644
--- a/sycl/source/detail/cg.cpp
+++ b/sycl/source/detail/cg.cpp
@@ -6,7 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "CL/sycl/detail/cg.hpp"
+#include <CL/sycl/detail/cg.hpp>
+#include <CL/sycl/detail/defines.hpp>
 #include <CL/sycl/detail/memory_manager.hpp>
 #include <CL/sycl/detail/pi.hpp>
 #include <detail/queue_impl.hpp>
@@ -18,7 +19,7 @@
 #include <type_traits>
 #include <vector>
 
-namespace cl {
+__SYCL_INLINE_NAMESPACE(cl) {
 namespace sycl {
 
 pi_native_handle interop_handler::GetNativeQueue() const {
@@ -41,4 +42,4 @@ pi_native_handle interop_handler::GetNativeMem(detail::Requirement *Req) const {
 }
 
 }  // sycl
-}  // cl
+} // __SYCL_INLINE_NAMESPACE(cl)
diff --git a/sycl/tools/get_device_count_by_type.cpp b/sycl/tools/get_device_count_by_type.cpp
index 77ef2a023326a..31d741950730b 100644
--- a/sycl/tools/get_device_count_by_type.cpp
+++ b/sycl/tools/get_device_count_by_type.cpp
@@ -193,7 +193,7 @@ int main(int argc, char *argv[]) {
   } else if (backend == "cuda" || backend == "pi_cuda") {
     querySuccess = queryCUDA(deviceType, deviceCount, msg);
   } else {
-    msg + "ERROR: Unknown backend " + backend + "\n" + help + "\n";
+    msg = "ERROR: Unknown backend " + backend + "\n" + help + "\n";
   }
 
   std::cout << deviceCount << ":" << msg << std::endl;