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c37a357c13
This reverts commit443389effc. This reverts commitd94960f22e. Inclusion of header files must be explicit. Every file shall directly include what is necessary. https://github.com/include-what-you-use/include-what-you-use says: > When every file includes what it uses, then it is possible to edit any > file and remove unused headers, without fear of accidentally breaking > the upwards dependencies of that file. It also becomes easy to > automatically track and update dependencies in the source code. Though we don't use iwyu itself, the principle quoted above is a good thing that we can agree. Now that include guards were added to every and all of the headers inside of our project this changeset does not increase compile time, at least on my machine.
131 lines
4.1 KiB
C++
131 lines
4.1 KiB
C++
#ifndef RUBY3_CONFIG_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY3_CONFIG_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 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/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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