156 lines
4.7 KiB
C++
Vendored
156 lines
4.7 KiB
C++
Vendored
#ifndef RBIMPL_CONFIG_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_CONFIG_H
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/**
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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 Thin wrapper to ruby/config.h
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*/
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#include "ruby/config.h"
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#ifdef RUBY_EXTCONF_H
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#include RUBY_EXTCONF_H
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#endif
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#include "ruby/internal/compiler_since.h"
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#undef HAVE_PROTOTYPES
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#define HAVE_PROTOTYPES 1
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#undef HAVE_STDARG_PROTOTYPES
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#define HAVE_STDARG_PROTOTYPES 1
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#undef TOKEN_PASTE
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#define TOKEN_PASTE(x, y) x##y
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#if defined(__cplusplus)
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#/* __builtin_choose_expr and __builtin_types_compatible aren't available
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# * on C++. See https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html */
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#undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
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#undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
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/* HAVE_VA_ARGS_MACRO is for C. C++ situations might be different. */
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#undef HAVE_VA_ARGS_MACRO
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#if __cplusplus >= 201103L
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#define HAVE_VA_ARGS_MACRO
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#elif defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__
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#define HAVE_VA_ARGS_MACRO
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#elif defined(__INTEL_CXX11_MODE__)
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#define HAVE_VA_ARGS_MACRO
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#elif RBIMPL_COMPILER_SINCE(MSVC, 16, 0, 0)
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#define HAVE_VA_ARGS_MACRO
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#else
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#/* NG, not known. */
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#endif
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#endif
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#if RBIMPL_COMPILER_BEFORE(GCC, 4, 9, 0)
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#/* See https://bugs.ruby-lang.org/issues/14221 */
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#undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
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#endif
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#if RBIMPL_COMPILER_BEFORE(GCC, 5, 0, 0)
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#/* GCC 4.9.2 reportedly has this feature and is broken. The function is not
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# * officially documented below. Seems we should not use it.
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# * https://gcc.gnu.org/onlinedocs/gcc-4.9.4/gcc/Other-Builtins.html */
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#undef HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN
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#endif
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#if defined(__SUNPRO_CC)
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#/* Oracle Developer Studio 12.5: GCC compatibility guide says it supports
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# * statement expressions. But to our knowledge they support the extension
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# * only for C and not for C++. Prove me wrong. Am happy to support them if
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# * there is a way. */
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#undef HAVE_STMT_AND_DECL_IN_EXPR
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#endif
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#ifndef STRINGIZE0
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#define STRINGIZE(expr) STRINGIZE0(expr)
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#define STRINGIZE0(expr) #expr
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#endif
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#ifdef AC_APPLE_UNIVERSAL_BUILD
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#undef WORDS_BIGENDIAN
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#ifdef __BIG_ENDIAN__
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#define WORDS_BIGENDIAN
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#endif
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#endif
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#ifndef DLEXT_MAXLEN
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#define DLEXT_MAXLEN 4
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#endif
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#ifndef RUBY_PLATFORM
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#define RUBY_PLATFORM "unknown-unknown"
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#endif
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#ifdef UNALIGNED_WORD_ACCESS
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#/* Take that. */
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#elif defined(__i386)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__i386__)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(_M_IX86)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__x86_64)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__x86_64__)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(_M_AMD64)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__powerpc64__)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__POWERPC__) // __POWERPC__ is defined for ppc and ppc64 on Darwin
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__aarch64__)
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#define UNALIGNED_WORD_ACCESS 1
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#elif defined(__mc68020__)
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#define UNALIGNED_WORD_ACCESS 1
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#else
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#define UNALIGNED_WORD_ACCESS 0
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#endif
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/* Detection of __VA_OPT__ */
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#if !defined(HAVE_VA_ARGS_MACRO)
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#undef HAVE___VA_OPT__
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#elif defined(__cplusplus)
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#if __cplusplus > 201703L
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#define HAVE___VA_OPT__
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#else
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#undef HAVE___VA_OPT__
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#endif
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#else
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#/* Idea taken from: https://stackoverflow.com/a/48045656 */
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#define RBIMPL_TEST3(q, w, e, ...) e
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#define RBIMPL_TEST2(...) RBIMPL_TEST3(__VA_OPT__(, ), 1, 0, 0)
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#define RBIMPL_TEST1() RBIMPL_TEST2("ruby")
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#if RBIMPL_TEST1()
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#define HAVE___VA_OPT__
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#else
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#undef HAVE___VA_OPT__
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#endif
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#undef RBIMPL_TEST1
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#undef RBIMPL_TEST2
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#undef RBIMPL_TEST3
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#endif /* HAVE_VA_ARGS_MACRO */
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#ifndef USE_RVARGC
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#define USE_RVARGC 1
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#endif
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#endif /* RBIMPL_CONFIG_H */
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