From 12ec1fb2b16be65f546151da85cbe842ca90dc3b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?= Date: Fri, 25 Aug 2023 14:21:55 +0900 Subject: [PATCH] use configure-detected sanity of _Alignof This is actually already checked in (Ruby's) configure. --- ext/fiddle/fiddle.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/ext/fiddle/fiddle.h b/ext/fiddle/fiddle.h index 5a31a4bdb8..53db058807 100644 --- a/ext/fiddle/fiddle.h +++ b/ext/fiddle/fiddle.h @@ -199,7 +199,10 @@ /* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 52023 . clang versions < 8.0.0 have the same bug. */ -#if (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112 \ +#if defined(HAVE__ALIGNOF) +# /* Autoconf detected availability of a sane `_Alignof()`. */ +# define ALIGN_OF(type) RB_GNUC_EXTENSION(_Alignof(type)) +#elif (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112 \ || (defined(__GNUC__) && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \ && !defined(__clang__)) \ || (defined(__clang__) && __clang_major__ < 8))