#ifndef RBIMPL_CONFIG_H /*-*-C++-*-vi:se ft=cpp:*/

#define RBIMPL_CONFIG_H

/**

* @author Ruby developers <ruby-core@ruby-lang.org>

* @copyright This file is a part of the programming language Ruby.

* Permission is hereby granted, to either redistribute and/or

* modify this file, provided that the conditions mentioned in the

* file COPYING are met. Consult the file for details.

* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are

* implementation details. Don't take them as canon. They could

* rapidly appear then vanish. The name (path) of this header file

* is also an implementation detail. Do not expect it to persist

* at the place it is now. Developers are free to move it anywhere

* anytime at will.

* @note To ruby-core: remember that this header can be possibly

* recursively included from extension libraries written in C++.

* Do not expect for instance `__VA_ARGS__` is always available.

* We assume C99 for ruby itself but we don't assume languages of

* extension libraries. They could be written in C++98.

* @brief Thin wrapper to ruby/config.h

*/

#include "ruby/config.h"

#ifdef RUBY_EXTCONF_H

# include RUBY_EXTCONF_H

#endif

#include "ruby/internal/compiler_since.h"

#undef HAVE_PROTOTYPES

#define HAVE_PROTOTYPES 1

#undef HAVE_STDARG_PROTOTYPES

#define HAVE_STDARG_PROTOTYPES 1

#undef TOKEN_PASTE

#define TOKEN_PASTE(x,y) x##y

#if defined(__cplusplus)

#/* __builtin_choose_expr and __builtin_types_compatible aren't available

# * on C++. See https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html */

# undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P

# undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P

/* HAVE_VA_ARGS_MACRO is for C. C++ situations might be different. */

# undef HAVE_VA_ARGS_MACRO

# if __cplusplus >= 201103L

# define HAVE_VA_ARGS_MACRO

# elif defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__

# define HAVE_VA_ARGS_MACRO

# elif defined(__INTEL_CXX11_MODE__)

# define HAVE_VA_ARGS_MACRO

# elif RBIMPL_COMPILER_SINCE(MSVC, 16, 0, 0)

# define HAVE_VA_ARGS_MACRO

# else

# /* NG, not known. */

# endif

#endif

#if RBIMPL_COMPILER_BEFORE(GCC, 4, 9, 0)

# /* See https://bugs.ruby-lang.org/issues/14221 */

# undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P

#endif

#if RBIMPL_COMPILER_BEFORE(GCC, 5, 0, 0)

# /* GCC 4.9.2 reportedly has this feature and is broken. The function is not

# * officially documented below. Seems we should not use it.

# * https://gcc.gnu.org/onlinedocs/gcc-4.9.4/gcc/Other-Builtins.html */

# undef HAVE_BUILTIN___BUILTIN_ALLOCA_WITH_ALIGN

#endif

#if defined(__SUNPRO_CC)

# /* Oracle Developer Studio 12.5: GCC compatibility guide says it supports

# * statement expressions. But to our knowledge they support the extension

# * only for C and not for C++. Prove me wrong. Am happy to support them if

# * there is a way. */

# undef HAVE_STMT_AND_DECL_IN_EXPR

#endif

#ifndef STRINGIZE0

# define STRINGIZE(expr) STRINGIZE0(expr)

# define STRINGIZE0(expr) #expr

#endif

#ifdef AC_APPLE_UNIVERSAL_BUILD

# undef WORDS_BIGENDIAN

# ifdef __BIG_ENDIAN__

# define WORDS_BIGENDIAN

# endif

#endif

#ifndef DLEXT_MAXLEN

# define DLEXT_MAXLEN 4

#endif

#ifndef RUBY_PLATFORM

# define RUBY_PLATFORM "unknown-unknown"

#endif

#ifdef UNALIGNED_WORD_ACCESS

# /* Take that. */

#elif defined(__i386)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__i386__)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(_M_IX86)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__x86_64)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__x86_64__)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(_M_AMD64)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__powerpc64__)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__POWERPC__) // __POWERPC__ is defined for ppc and ppc64 on Darwin

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__aarch64__)

# define UNALIGNED_WORD_ACCESS 1

#elif defined(__mc68020__)

# define UNALIGNED_WORD_ACCESS 1

#else

# define UNALIGNED_WORD_ACCESS 0

#endif

/* Detection of __VA_OPT__ */

#if ! defined(HAVE_VA_ARGS_MACRO)

# undef HAVE___VA_OPT__

#elif defined(__cplusplus)

# if __cplusplus > 201703L

# define HAVE___VA_OPT__

# else

# undef HAVE___VA_OPT__

# endif

#else

# /* Idea taken from: https://stackoverflow.com/a/48045656 */

# define RBIMPL_TEST3(q, w, e, ...) e

# define RBIMPL_TEST2(...) RBIMPL_TEST3(__VA_OPT__(,),1,0,0)

# define RBIMPL_TEST1() RBIMPL_TEST2("ruby")

# if RBIMPL_TEST1()

# define HAVE___VA_OPT__

# else

# undef HAVE___VA_OPT__

# endif

# undef RBIMPL_TEST1

# undef RBIMPL_TEST2

# undef RBIMPL_TEST3

#endif /* HAVE_VA_ARGS_MACRO */

#endif /* RBIMPL_CONFIG_H */