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According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#ifndef INTERNAL_INITS_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_INITS_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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* @brief Internal header aggregating init functions.
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*/
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/* class.c */
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void Init_class_hierarchy(void);
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/* dmyext.c */
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void Init_enc(void);
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void Init_ext(void);
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/* file.c */
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void Init_File(void);
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/* gc.c */
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void Init_heap(void);
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/* localeinit.c */
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int Init_enc_set_filesystem_encoding(void);
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/* newline.c */
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void Init_newline(void);
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/* vm.c */
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void Init_BareVM(void);
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void Init_vm_objects(void);
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/* vm_backtrace.c */
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void Init_vm_backtrace(void);
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/* vm_eval.c */
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void Init_vm_eval(void);
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/* vm_insnhelper.c */
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void Init_vm_stack_canary(void);
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/* vm_method.c */
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void Init_eval_method(void);
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/* inits.c */
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void rb_call_inits(void);
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#endif /* INTERNAL_INITS_H */
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