| 1 | //===-- Portable attributes -------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // This header file defines a set of macros for checking the presence of |
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| 9 | // important compiler and platform features. Such macros can be used to |
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| 10 | // produce portable code by parameterizing compilation based on the presence or |
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| 11 | // lack of a given feature. |
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| 12 | |
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| 13 | #ifndef LLVM_LIBC_SRC___SUPPORT_MACROS_CONFIG_H |
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| 14 | #define LLVM_LIBC_SRC___SUPPORT_MACROS_CONFIG_H |
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| 15 | |
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| 16 | // Workaround for compilers that do not support builtin detection. |
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| 17 | // FIXME: This is only required for the GPU portion which should be moved. |
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| 18 | #ifndef __has_builtin |
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| 19 | #define __has_builtin(b) 0 |
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| 20 | #endif |
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| 21 | |
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| 22 | // Compiler feature-detection. |
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| 23 | // clang.llvm.org/docs/LanguageExtensions.html#has-feature-and-has-extension |
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| 24 | #ifdef __has_feature |
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| 25 | #define LIBC_HAS_FEATURE(f) __has_feature(f) |
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| 26 | #else |
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| 27 | #define LIBC_HAS_FEATURE(f) 0 |
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| 28 | #endif |
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| 29 | |
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| 30 | #endif // LLVM_LIBC_SRC___SUPPORT_MACROS_CONFIG_H |
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| 31 | |
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