From owner-svn-src-head@freebsd.org  Fri May 27 08:19:39 2016
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Subject: Re: svn commit: r300718 - in head/sys: kern sys
To: Konstantin Belousov <kostikbel@gmail.com>
References: <201605260841.u4Q8ft9r045564@repo.freebsd.org>
 <20160526213716.GK58287@FreeBSD.org>
 <da70cbf0-4e4a-7050-f84b-25d00aad7b78@selasky.org>
 <20160527081120.GJ38613@kib.kiev.ua>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
From: Hans Petter Selasky <hps@selasky.org>
Message-ID: <ba1f536d-ab20-4771-1322-db02ad93aac8@selasky.org>
Date: Fri, 27 May 2016 10:22:55 +0200
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On 05/27/16 10:11, Konstantin Belousov wrote:
> On Fri, May 27, 2016 at 09:42:24AM +0200, Hans Petter Selasky wrote:
>> We cannot use the "bool" type in userspace at least, because
>> sizeof(bool) depends on the compiler. So the interface must use an
>> integer type at least, possibly uint8_t like now.
>
> What do you mean ?  There are ABIs, and we expect all used compilers to
> follow common arch ABI.  Old psABIs date back to time where _Bool
> did not existed yet, but now it is ubiquitious.  E.g. both i386 and
> amd64 require _Bool have a representation by single byte, with the
> byte alignment.
>
> Can you give exact examples of the inconsistencies, on any platform,
> regardless of our tier ?
>

Hi,

I was reading this article:
http://stackoverflow.com/questions/4897844/is-sizeofbool-defined

And is says:
sizeof(bool) is not required to be 1.

--HPS