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Date: Mon, 16 Dec 2019 18:49:21 +0100
From: Florian Weimer <fw@...eb.enyo.de>
To: Rich Felker <dalias@...c.org>
Cc: musl@...ts.openwall.com
Subject: Re: max_align_t mess on i386
* Rich Felker:
> The latter looks buggy. It's clearly supposed to be in bits, not
> bytes, with some archs defining it as 64 or 128 and:
>
> gcc/defaults.h:#ifndef MALLOC_ABI_ALIGNMENT
> gcc/defaults.h:#define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
>
> However arm has:
>
> gcc/config/arm/arm.h:#define MALLOC_ABI_ALIGNMENT BIGGEST_ALIGNMENT
>
> which is in bytes...
The target hook is in bits. The macro synthesized from that is in
bytes:
cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
BIGGEST_ALIGNMENT / BITS_PER_UNIT);
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