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Re: [PATCH v2] Define alignof_slot using _Alignof when using C11 or newe

From: Paul Eggert
Subject: Re: [PATCH v2] Define alignof_slot using _Alignof when using C11 or newer
Date: Sat, 14 Jan 2023 17:51:59 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2

On 2023-01-14 17:20, Khem Raj wrote:
+/* GCC releases before GCC 4.9 had a bug in _Alignof.  See GCC bug 52023
+   clang versions < 8.0.0 have the same bug.  */
+#elif (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
+       || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
+           && !defined __clang__) \
+       || (defined __clang__ && __clang_major__ < 8))

We already have two copies of that stuff elsewhere (in lib/stdalign.in.h and m4/stdalign.m4), for reasons that currently escape me. Let's not balloon the number of copies to three.

I installed the attached smaller patch which should do the trick for C.

Is there a similar problem with C++.

Attachment: 0001-alignof-port-to-strict-C23.patch
Description: Text Data

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