From 7c7133b7186a760927316468d850578a7fa09edf Mon Sep 17 00:00:00 2001 From: shyouhei Date: Mon, 30 Jan 2017 04:42:04 +0000 Subject: [PATCH] #include 17+ years passed since standardized in ISO, 8 years since we added AC_HEADER_STDBOOL to configure.in. I'm quite confident that it's already safe to use . I understand that when we introduced AC_HEADER_STDBOOL, was remain not included because C standard and SVR4 curses conflicted miserably back then (#1). Though I believe such situation has been fixed already(#2), I'm afraid of your operating system might ship a proprietary curses that still conflicts with the standard. So to avoid potential problem, we limit the inclusion to our internal use only. #1 : 1997 version of SUSv2 said bool is "defined though typedef" in , while C99 said bool is a macro, plus in C++ bool is a keyword. AFASIK the curses library has never been a part of POSIX. #2 : In reality ncurses and NetBSD curses both just follow C99 to include from . I think C99 is now widely adopted. ---- * internal.h: #include if present. That is believed to be the case for 99.9% systems that lives today. Non-C99, non-C++ situations are intentionally left undefined, advised by Motohiro Kosaki. If you have such compiler, please fill the definition appropriately. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57460 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- internal.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/internal.h b/internal.h index ce4cc3c996..f57b6f9c81 100644 --- a/internal.h +++ b/internal.h @@ -23,6 +23,19 @@ extern "C" { #endif #endif +#ifdef HAVE_STDBOOL_H +# include +#endif + +#ifndef __bool_true_false_are_defined +# ifndef __cplusplus +# error :FIXME: You are the first one who use pre-C99 compiler. +# error :FIXME: Please add appropriate definition here. +# error :FIXME: This part is intentionally left undefined, +# error :FIXME: because the author no longer have such environment. +# endif +#endif + #define LIKELY(x) RB_LIKELY(x) #define UNLIKELY(x) RB_UNLIKELY(x)