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https://github.com/ruby/ruby.git
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131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
/** \noop-*-C++-*-vi:ft=cpp
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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 Thin wrapper to ruby/config.h
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*/
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#ifndef RUBY3_CONFIG_H
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#define RUBY3_CONFIG_H
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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/3/compiler_since.h"
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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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# 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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/* 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 RUBY3_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 RUBY3_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 RUBY3_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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#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(__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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#else
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# /* Idea taken from: https://stackoverflow.com/a/48045656 */
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# define RUBY3_TEST3(q, w, e, ...) e
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# define RUBY3_TEST2(...) RUBY3_TEST3(__VA_OPT__(,),1,0,0)
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# define RUBY3_TEST1() RUBY3_TEST2("ruby")
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# if RUBY3_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 RUBY3_TEST1
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# undef RUBY3_TEST2
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# undef RUBY3_TEST3
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#endif /* HAVE_VA_ARGS_MACRO */
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#endif /* RUBY3_CONFIG_H */
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