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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) 2019 Scylladb, Ltd.
#
function (_stdatomic_can_link var)
include (CheckCXXSourceCompiles)
set (test_code "int main() {}")
set (CMAKE_REQUIRED_LIBRARIES -latomic)
check_cxx_source_compiles ("${test_code}" ${var})
endfunction ()
_stdatomic_can_link (StdAtomic_EXPLICIT_LINK)
#
# If linking against `-latomic` is successful, then do it unconditionally.
#
if (StdAtomic_EXPLICIT_LINK)
set (StdAtomic_LIBRARY_NAME atomic)
set (StdAtomic_LIBRARIES -l${StdAtomic_LIBRARY_NAME})
include (FindPackageHandleStandardArgs)
find_package_handle_standard_args (StdAtomic
REQUIRED_VARS StdAtomic_LIBRARIES)
endif ()
if (NOT (TARGET StdAtomic::atomic))
add_library (StdAtomic::atomic INTERFACE IMPORTED)
set_target_properties (StdAtomic::atomic
PROPERTIES
INTERFACE_LINK_LIBRARIES "${StdAtomic_LIBRARIES}")
endif ()
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