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-rw-r--r--src/seastar/cmake/FindSourceLocation.cmake46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/seastar/cmake/FindSourceLocation.cmake b/src/seastar/cmake/FindSourceLocation.cmake
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+++ b/src/seastar/cmake/FindSourceLocation.cmake
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+#
+# 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) 2022 Kefu Chai ( tchaikov@gmail.com )
+#
+
+include (CheckCXXSourceCompiles)
+include (CheckCXXSourceRuns)
+include (CMakePushCheckState)
+
+cmake_push_check_state ()
+file (READ ${CMAKE_CURRENT_LIST_DIR}/code_tests/Source_location_test.cc _source_location_test_code)
+set(CMAKE_REQUIRED_FLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION}")
+check_cxx_source_compiles ("${_source_location_test_code}" CxxSourceLocation_SUPPORTED)
+
+file (READ ${CMAKE_CURRENT_LIST_DIR}/code_tests/Source_location_default_argument.cc _source_location_test_code)
+set(CMAKE_REQUIRED_FLAGS "${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION}")
+# see also https://cplusplus.github.io/CWG/issues/2631.html
+check_cxx_source_runs ("${_source_location_test_code}" CxxSourceLocation_IMPLEMENTS_CWG2631)
+cmake_pop_check_state ()
+
+if (NOT (TARGET SourceLocation::source_location))
+ add_library (SourceLocation::source_location INTERFACE IMPORTED)
+ if ((NOT CxxSourceLocation_SUPPORTED) OR
+ (NOT CxxSourceLocation_IMPLEMENTS_CWG2631))
+ set_target_properties (SourceLocation::source_location
+ PROPERTIES
+ INTERFACE_COMPILE_DEFINITIONS SEASTAR_BROKEN_SOURCE_LOCATION)
+ endif ()
+endif ()