51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/**
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* Copyright 2017 Nest Labs Inc. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* This file defines private macros and interfaces.
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*/
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#ifndef NLIO_PRIVATE_H
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#define NLIO_PRIVATE_H
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/*
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* If we are compiling under clang, GCC, or any such compatible
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* compiler, in which -fno-builtins or -ffreestanding might be
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* asserted, thereby eliminating built-in function optimization, we
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* may STILL want to leverage built-ins.
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*
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* Provide an internal convenience macro to do so.
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*/
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/**
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* @def __nlIOHasBuiltin
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*
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* @brief
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* Determines whether or not the compiler in effect has support
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* for the specified built-in function.
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*
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*/
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#ifdef __clang__
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#define __nlIOHasBuiltin(...) __has_builtin(__VA_ARGS__)
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#elif defined __GNUC__
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#define __nlIOHasBuiltin(...) 1
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#else
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#define __nlIOHasBuiltin(...) 0
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#endif /* __clang__ */
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#endif /* NLIO_PRIVATE_H */
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