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Diffstat (limited to 'include/ruby/internal/config.h')
| -rw-r--r-- | include/ruby/internal/config.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/ruby/internal/config.h b/include/ruby/internal/config.h new file mode 100644 index 0000000000..e6c4d12488 --- /dev/null +++ b/include/ruby/internal/config.h @@ -0,0 +1,131 @@ +#ifndef RBIMPL_CONFIG_H /*-*-C++-*-vi:se ft=cpp:*/ +#define RBIMPL_CONFIG_H +/** + * @file + * @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/impl/compiler_since.h" + +#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 + +# undef HAVE_PROTOTYPES +# define HAVE_PROTOTYPES 1 + +# undef HAVE_STDARG_PROTOTYPES +# define HAVE_STDARG_PROTOTYPES 1 + +/* 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 + +#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(__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__ + +#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 */ |