1 files changed, 57 insertions, 0 deletions
diff --git a/src/seastar/cmake/Findrt.cmake b/src/seastar/cmake/Findrt.cmake
new file mode 100644
index 00000000..359043c0
--- /dev/null
+++ b/src/seastar/cmake/Findrt.cmake
@@ -0,0 +1,57 @@
+#
+# This file is open source software, licensed to you under the terms
+# of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+# distributed with this work for additional information regarding copyright
+# ownership.  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.
+#
+
+#
+# Copyright (C) 2018 Scylladb, Ltd.
+#
+
+set (_rt_test_source ${CMAKE_CURRENT_LIST_DIR}/code_tests/rt_test.cc)
+
+# Try to compile without the library first.
+try_compile (rt_NO_EXPLICIT_LINK
+  ${CMAKE_CURRENT_BINARY_DIR}
+  SOURCES ${_rt_test_source})
+
+if (rt_NO_EXPLICIT_LINK)
+  set (rt_FOUND yes)
+else ()
+  # The `rt` library is required.
+
+  try_compile (_rt_test
+    ${CMAKE_CURRENT_BINARY_DIR}
+    SOURCES ${_rt_test_source}
+    LINK_LIBRARIES rt)
+
+  if (_rt_test)
+    set (rt_LIBRARY_NAME rt)
+    set (rt_LIBRARIES -l${rt_LIBRARY_NAME})
+  endif ()
+
+  include (FindPackageHandleStandardArgs)
+
+  find_package_handle_standard_args (rt
+    REQUIRED_VARS rt_LIBRARIES)
+endif ()
+
+if (rt_FOUND AND NOT (TARGET rt::rt))
+  add_library (rt::rt INTERFACE IMPORTED)
+
+  set_target_properties (rt::rt
+    PROPERTIES
+      INTERFACE_LINK_LIBRARIES "${rt_LIBRARIES}")
+endif ()