Re: [atlas-devel] anybody know of need for C89 compliance?

[Jeff H. <jef...@gm...>]

On Sat, Jan 14, 2017 at 6:33 PM, john skaller <sk...@us...
> wrote:

>
> > On 15 Jan. 2017, at 08:11, Andrew Reilly <ar...@bi...> wrote:
> >
> > Hi Clint,
> >
> > The two compilers with least support for c99 features that I'm aware of
> are MSVC and TI CodeComposer.  Both have most of the support for C99
> library features, but both (being primarily C++ compilers) don’t have good
> support for the C99 language features that aren't in C++.
>
> Doesn’t modern MSVC provide full C99 support?
>

>From what I've heard, there has been no progress on this except the cases
where C99 features were added to C++11.


> I though MS caved in to demands?
>
>
Who would demand this?  No one in the Windows world cares about C99.  The
only folks I know who want MSVC to support C99 are HPC developers who still
think Windows support matters.


>
> > I’m fairly sure that modern versions of MSVC support long long int and
> %llu, although you might have to spell the former as __int64 on some
> versions.
>
>
%llu works for "long long unsigned".  For int64_t, you need the PRId64
macro.  Since __int64 isn't standard, one does whatever the compiler docs
specify.


> I have no idea why anyone would want long long anyhow.
> Use intptr_t instead.
>
>
"long long" must be at least 64-bits, regardless of how wide pointers are.
On a 32-bit OS, you would see sizeof(long long)=2*sizeof(intptr_t), no?

Jeff, speaking in a strictly personal capacity


>
> —
> john skaller
> sk...@us...
> http://felix-lang.org
>
>
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-- 
Jeff Hammond
jef...@gm...
http://jeffhammond.github.io/