[REVIEW] Enforce default visibility for get_map.

include/rmm/detail/export.hpp

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+// Macros used for defining symbol visibility, only GLIBC is supported
+#if (defined(__GNUC__) && !defined(__MINGW32__) && !defined(__MINGW64__))
+#define RMM_EXPORT __attribute__((visibility("default")))
+#define RMM_HIDDEN __attribute__((visibility("hidden")))
+#else
+#define RMM_EXPORT
+#define RMM_HIDDEN
+#endif

include/rmm/mr/device/per_device_resource.hpp

@@ -17,6 +17,7 @@
 #pragma once
 
 #include <rmm/cuda_device.hpp>
+#include <rmm/detail/export.hpp>
 #include <rmm/mr/device/cuda_memory_resource.hpp>
 #include <rmm/mr/device/device_memory_resource.hpp>
 
@@ -95,7 +96,8 @@ inline std::mutex& map_lock()
   return map_lock;
 }
 
-inline auto& get_map()
+// Must have default visibility, see: https://github.com/rapidsai/rmm/issues/826
+RMM_EXPORT inline auto& get_map()
 {
   static std::map<cuda_device_id::value_type, device_memory_resource*> device_id_to_resource;
   return device_id_to_resource;