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* See [Feature #17752] * Defining explicitly to 0 seems the best solution, see https://github.com/ruby/ruby/pull/4428 * For example: ./include/ruby/internal/has/builtin.h:49:33: error: "RBIMPL_HAS_BUILTIN___builtin_assume" is not defined, evaluates to 0 [-Werror=undef] 49 | # define RBIMPL_HAS_BUILTIN(_) (RBIMPL_HAS_BUILTIN_ ## _) | ^~~~~~~~~~~~~~~~~~~ ./include/ruby/internal/assume.h:75:7: note: in expansion of macro ‘RBIMPL_HAS_BUILTIN’ 75 | #elif RBIMPL_HAS_BUILTIN(__builtin_assume) | ^~~~~~~~~~~~~~~~~~
119 lines
7.2 KiB
C++
119 lines
7.2 KiB
C++
#ifndef RBIMPL_HAS_BUILTIN_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_HAS_BUILTIN_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
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* implementation details. Don't take them as canon. They could
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* rapidly appear then vanish. The name (path) of this header file
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* is also an implementation detail. Do not expect it to persist
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* at the place it is now. Developers are free to move it anywhere
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* anytime at will.
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* @note To ruby-core: remember that this header can be possibly
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* recursively included from extension libraries written in C++.
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* Do not expect for instance `__VA_ARGS__` is always available.
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* We assume C99 for ruby itself but we don't assume languages of
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* extension libraries. They could be written in C++98.
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* @brief Defines #RBIMPL_HAS_BUILTIN.
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*/
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#include "ruby/internal/config.h"
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#include "ruby/internal/compiler_since.h"
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#if defined(__has_builtin)
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# if RBIMPL_COMPILER_IS(Intel)
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# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is
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# * reportedly broken. We have to skip them. However the situation can
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# * change. They might improve someday. We need to revisit here later. */
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# elif RBIMPL_COMPILER_IS(GCC) && ! __has_builtin(__builtin_alloca)
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# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of
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# * __has_builtin. Cygwin copied that content to be a victim of the
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# * broken-ness. We don't take them into account. */
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# else
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# define RBIMPL_HAVE___HAS_BUILTIN 1
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# endif
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#endif
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/** Wraps (or simulates) `__has_builtin`. */
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#if defined(RBIMPL_HAVE___HAS_BUILTIN)
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# define RBIMPL_HAS_BUILTIN(_) __has_builtin(_)
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#elif RBIMPL_COMPILER_IS(GCC)
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# /* :FIXME: Historically GCC has had tons of builtins, but it implemented
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# * __has_builtin only since GCC 10. This section can be made more
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# * granular. */
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# /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66970 */
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# define RBIMPL_HAS_BUILTIN(_) (RBIMPL_HAS_BUILTIN_ ## _)
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# define RBIMPL_HAS_BUILTIN___builtin_add_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_alloca RBIMPL_COMPILER_SINCE(GCC, 0, 0, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_alloca_with_align RBIMPL_COMPILER_SINCE(GCC, 6, 1, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_assume 0
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# /* See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624 for bswap16. */
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# define RBIMPL_HAS_BUILTIN___builtin_bswap16 RBIMPL_COMPILER_SINCE(GCC, 4, 8, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_bswap32 RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_bswap64 RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_clz RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_clzl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_clzll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_constant_p RBIMPL_COMPILER_SINCE(GCC, 2,95, 3)
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# define RBIMPL_HAS_BUILTIN___builtin_ctz RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_ctzl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_ctzll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_expect RBIMPL_COMPILER_SINCE(GCC, 3, 0, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow_p RBIMPL_COMPILER_SINCE(GCC, 7, 0, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_popcount RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_popcountl RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_popcountll RBIMPL_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_rotateleft32 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateleft64 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateright32 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateright64 0
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# define RBIMPL_HAS_BUILTIN___builtin_sub_overflow RBIMPL_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RBIMPL_HAS_BUILTIN___builtin_unreachable RBIMPL_COMPILER_SINCE(GCC, 4, 5, 0)
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# /* Note that "0, 0, 0" might be inaccurate. */
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#elif RBIMPL_COMPILER_IS(MSVC)
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# /* MSVC has UNREACHABLE, but that is not __builtin_unreachable. */
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# define RBIMPL_HAS_BUILTIN(_) 0
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#else
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# /* Take config.h definition when available */
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# define RBIMPL_HAS_BUILTIN(_) ((RBIMPL_HAS_BUILTIN_ ## _)+0)
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# define RBIMPL_HAS_BUILTIN___builtin_add_overflow HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW
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# define RBIMPL_HAS_BUILTIN___builtin_alloca 0
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# define RBIMPL_HAS_BUILTIN___builtin_alloca_with_align HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN
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# define RBIMPL_HAS_BUILTIN___builtin_assume 0
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# define RBIMPL_HAS_BUILTIN___builtin_assume_aligned HAVE_BUILTIN___BUILTIN_ASSUME_ALIGNED
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# define RBIMPL_HAS_BUILTIN___builtin_bswap16 HAVE_BUILTIN___BUILTIN_BSWAP16
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# define RBIMPL_HAS_BUILTIN___builtin_bswap32 HAVE_BUILTIN___BUILTIN_BSWAP32
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# define RBIMPL_HAS_BUILTIN___builtin_bswap64 HAVE_BUILTIN___BUILTIN_BSWAP64
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# define RBIMPL_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ
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# define RBIMPL_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL
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# define RBIMPL_HAS_BUILTIN___builtin_clzll HAVE_BUILTIN___BUILTIN_CLZLL
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# define RBIMPL_HAS_BUILTIN___builtin_constant_p HAVE_BUILTIN___BUILTIN_CONSTANT_P
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# define RBIMPL_HAS_BUILTIN___builtin_ctz HAVE_BUILTIN___BUILTIN_CTZ
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# define RBIMPL_HAS_BUILTIN___builtin_ctzl 0
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# define RBIMPL_HAS_BUILTIN___builtin_ctzll HAVE_BUILTIN___BUILTIN_CTZLL
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# define RBIMPL_HAS_BUILTIN___builtin_expect HAVE_BUILTIN___BUILTIN_EXPECT
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# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW
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# define RBIMPL_HAS_BUILTIN___builtin_mul_overflow_p HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P
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# define RBIMPL_HAS_BUILTIN___builtin_popcount HAVE_BUILTIN___BUILTIN_POPCOUNT
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# define RBIMPL_HAS_BUILTIN___builtin_popcountl 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateleft32 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateleft64 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateright32 0
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# define RBIMPL_HAS_BUILTIN___builtin_rotateright64 0
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# define RBIMPL_HAS_BUILTIN___builtin_popcountll HAVE_BUILTIN___BUILTIN_POPCOUNTLL
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# define RBIMPL_HAS_BUILTIN___builtin_sub_overflow HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW
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# if defined(UNREACHABLE)
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# define RBIMPL_HAS_BUILTIN___builtin_unreachable 1
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# else
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# define RBIMPL_HAS_BUILTIN___builtin_unreachable 0
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# endif
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#endif
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#endif /* RBIMPL_HAS_BUILTIN_H */
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