mirror of
https://github.com/wpilibsuite/allwpilib
synced 2026-06-20 00:51:42 +00:00
f6b700ea97
This is a breaking change to dependencies that use the static ntcore library. Unless the wpiutil library is also linked, linker errors will result. This does not affect the shared ntcore library.
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
//===-- llvm/Support/Compiler.h - Compiler abstraction support --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines several macros, based on the current compiler. This allows
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// use of compiler-specific features in a way that remains portable.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_COMPILER_H
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#define LLVM_SUPPORT_COMPILER_H
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#ifndef __has_feature
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# define __has_feature(x) 0
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#endif
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#ifndef __has_extension
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# define __has_extension(x) 0
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#endif
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#ifndef __has_attribute
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# define __has_attribute(x) 0
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#endif
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#ifndef __has_builtin
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# define __has_builtin(x) 0
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#endif
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/// \macro LLVM_GNUC_PREREQ
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/// \brief Extend the default __GNUC_PREREQ even if glibc's features.h isn't
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/// available.
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#ifndef LLVM_GNUC_PREREQ
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# if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
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# define LLVM_GNUC_PREREQ(maj, min, patch) \
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((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
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((maj) << 20) + ((min) << 10) + (patch))
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# elif defined(__GNUC__) && defined(__GNUC_MINOR__)
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# define LLVM_GNUC_PREREQ(maj, min, patch) \
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((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
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# else
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# define LLVM_GNUC_PREREQ(maj, min, patch) 0
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# endif
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#endif
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#ifndef LLVM_ATTRIBUTE_UNUSED_RESULT
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#if __has_attribute(warn_unused_result) || LLVM_GNUC_PREREQ(3, 4, 0)
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#define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__))
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#else
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#define LLVM_ATTRIBUTE_UNUSED_RESULT
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#endif
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#endif
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#ifndef LLVM_UNLIKELY
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#if __has_builtin(__builtin_expect) || LLVM_GNUC_PREREQ(4, 0, 0)
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#define LLVM_LIKELY(EXPR) __builtin_expect((bool)(EXPR), true)
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#define LLVM_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false)
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#else
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#define LLVM_LIKELY(EXPR) (EXPR)
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#define LLVM_UNLIKELY(EXPR) (EXPR)
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#endif
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#endif
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#endif
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