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48273534c7
FreeBSD's <sys/cdefs.h> is broken. Cygwin is also affected by that.
We need to avoid using them.
See also:
d1c67819db
https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;f=newlib/libc/include/sys/cdefs.h;h=44d6d53977e6bc82c2b1e6dbe8ae7f310b260604
105 lines
6.4 KiB
C++
105 lines
6.4 KiB
C++
#ifndef RUBY3_HAS_BUILTIN_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY3_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 `RUBY3` or `ruby3` 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 #RUBY3_HAS_BUILTIN.
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*/
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#include "ruby/3/config.h"
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#include "ruby/3/compiler_since.h"
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#include "ruby/3/token_paste.h"
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#ifndef __has_builtin
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# /* Don't bother. */
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#elif RUBY3_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 RUBY3_COMPILER_IS(GCC) && ! __has_builtin(__builtin_alloca)
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# /* FreeBSD's <sys/cdefs.h> defines its own *broken* version of __has_builtin.
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# * Cygwin copied that content to be a victim of the broken-ness. We don't
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# * take them into account. */
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#else
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# define RUBY3_HAVE___HAS_BUILTIN 1
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#endif
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/** Wraps (or simulates) `__has_builtin`. */
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#if defined(RUBY3_HAVE___HAS_BUILTIN)
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# define RUBY3_HAS_BUILTIN(_) __has_builtin(_)
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#elif RUBY3_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 RUBY3_HAS_BUILTIN(_) RUBY3_TOKEN_PASTE(RUBY3_HAS_BUILTIN_, _)
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# define RUBY3_HAS_BUILTIN___builtin_add_overflow RUBY3_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RUBY3_HAS_BUILTIN___builtin_alloca RUBY3_COMPILER_SINCE(GCC, 0, 0, 0)
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# define RUBY3_HAS_BUILTIN___builtin_alloca_with_align RUBY3_COMPILER_SINCE(GCC, 6, 1, 0)
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# /* See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624 for bswap16. */
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# define RUBY3_HAS_BUILTIN___builtin_bswap16 RUBY3_COMPILER_SINCE(GCC, 4, 8, 0)
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# define RUBY3_HAS_BUILTIN___builtin_bswap32 RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_bswap64 RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_clz RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_clzl RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_clzll RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_constant_p RUBY3_COMPILER_SINCE(GCC, 2,95, 3)
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# define RUBY3_HAS_BUILTIN___builtin_ctz RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_ctzl RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_ctzll RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_expect RUBY3_COMPILER_SINCE(GCC, 3, 0, 0)
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# define RUBY3_HAS_BUILTIN___builtin_mul_overflow RUBY3_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RUBY3_HAS_BUILTIN___builtin_mul_overflow_p RUBY3_COMPILER_SINCE(GCC, 7, 0, 0)
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# define RUBY3_HAS_BUILTIN___builtin_popcount RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_popcountl RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_popcountll RUBY3_COMPILER_SINCE(GCC, 3, 6, 0)
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# define RUBY3_HAS_BUILTIN___builtin_sub_overflow RUBY3_COMPILER_SINCE(GCC, 5, 1, 0)
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# define RUBY3_HAS_BUILTIN___builtin_unreachable RUBY3_COMPILER_SINCE(GCC, 4, 5, 0)
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# /* Note that "0, 0, 0" might be inaccurate. */
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#elif RUBY3_COMPILER_IS(MSVC)
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# /* MSVC has UNREACHABLE, but that is not __builtin_unreachable. */
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# define RUBY3_HAS_BUILTIN(_) 0
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#else
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# /* Take config.h definition when available */
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# define RUBY3_HAS_BUILTIN(_) (RUBY3_TOKEN_PASTE(RUBY3_HAS_BUILTIN_, _)+0)
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# define RUBY3_HAS_BUILTIN___builtin_add_overflow HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW
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# define RUBY3_HAS_BUILTIN___builtin_alloca_with_align HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN
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# define RUBY3_HAS_BUILTIN___builtin_assume_aligned HAVE_BUILTIN___BUILTIN_ASSUME_ALIGNED
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# define RUBY3_HAS_BUILTIN___builtin_bswap16 HAVE_BUILTIN___BUILTIN_BSWAP16
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# define RUBY3_HAS_BUILTIN___builtin_bswap32 HAVE_BUILTIN___BUILTIN_BSWAP32
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# define RUBY3_HAS_BUILTIN___builtin_bswap64 HAVE_BUILTIN___BUILTIN_BSWAP64
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# define RUBY3_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ
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# define RUBY3_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL
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# define RUBY3_HAS_BUILTIN___builtin_clzll HAVE_BUILTIN___BUILTIN_CLZLL
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# define RUBY3_HAS_BUILTIN___builtin_constant_p HAVE_BUILTIN___BUILTIN_CONSTANT_P
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# define RUBY3_HAS_BUILTIN___builtin_ctz HAVE_BUILTIN___BUILTIN_CTZ
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# define RUBY3_HAS_BUILTIN___builtin_ctzll HAVE_BUILTIN___BUILTIN_CTZLL
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# define RUBY3_HAS_BUILTIN___builtin_expect HAVE_BUILTIN___BUILTIN_EXPECT
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# define RUBY3_HAS_BUILTIN___builtin_mul_overflow HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW
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# define RUBY3_HAS_BUILTIN___builtin_mul_overflow_p HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P
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# define RUBY3_HAS_BUILTIN___builtin_popcount HAVE_BUILTIN___BUILTIN_POPCOUNT
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# define RUBY3_HAS_BUILTIN___builtin_popcountll HAVE_BUILTIN___BUILTIN_POPCOUNTLL
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# define RUBY3_HAS_BUILTIN___builtin_sub_overflow HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW
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# if defined(UNREACHABLE)
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# define RUBY3_HAS_BUILTIN___builtin_unreachable 1
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# endif
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#endif
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#endif /* RUBY3_HAS_BUILTIN_H */
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