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Date: Fri, 27 May 2016 11:37:35 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Hans Petter Selasky <hps@selasky.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r300718 - in head/sys: kern sys
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On Fri, May 27, 2016 at 10:22:55AM +0200, Hans Petter Selasky wrote:
> 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.

It is clear that the answers you referenced talk about requirements
of the C standard.