52 lines
1.5 KiB
CMake
52 lines
1.5 KiB
CMake
#
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# This file is open source software, licensed to you under the terms
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# of the Apache License, Version 2.0 (the "License"). See the NOTICE file
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# distributed with this work for additional information regarding copyright
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# ownership. You may not use this file except in compliance with the License.
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#
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#
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#
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# Copyright (C) 2019 Scylladb, Ltd.
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#
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function (_stdatomic_can_link var)
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include (CheckCXXSourceCompiles)
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set (test_code "int main() {}")
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set (CMAKE_REQUIRED_LIBRARIES -latomic)
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check_cxx_source_compiles ("${test_code}" ${var})
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endfunction ()
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_stdatomic_can_link (StdAtomic_EXPLICIT_LINK)
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#
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# If linking against `-latomic` is successful, then do it unconditionally.
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#
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if (StdAtomic_EXPLICIT_LINK)
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set (StdAtomic_LIBRARY_NAME atomic)
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set (StdAtomic_LIBRARIES -l${StdAtomic_LIBRARY_NAME})
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include (FindPackageHandleStandardArgs)
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find_package_handle_standard_args (StdAtomic
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REQUIRED_VARS StdAtomic_LIBRARIES)
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endif ()
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if (NOT (TARGET StdAtomic::atomic))
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add_library (StdAtomic::atomic INTERFACE IMPORTED)
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set_target_properties (StdAtomic::atomic
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PROPERTIES
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INTERFACE_LINK_LIBRARIES "${StdAtomic_LIBRARIES}")
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endif ()
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