Re: uint64_t fails with C++

[Nick Bowler]

On 2011-12-07 15:31 -0500, Mike Frysinger wrote:
> On Wednesday 07 December 2011 14:10:27 Bob Friesenhahn wrote:
> > On Wed, 7 Dec 2011, Werner LEMBERG wrote:
> > >> C++ compilers do not get these definition from stdint.h unless
> > >> __STDC_LIMIT_MACROS is defined, the macros are in C99 and later, but
> > >> were not in the C++ standard of the day (I don't know if they're in
> > >> later C++ standards), so aren't defined for C++ compilers by
> > >> default.
> > > 
> > > I still don't understand the details of the autoconf problem (and I
> > > still think that something is fishy), but defining this macro works
> > > just fine :-)
> > 
> > Clearly, depending on an implementation-dependent macro is not
> > suitable for portable software.
> 
> i thought __STDC_LIMIT_MACROS was part of the spec and thus not 
> "implementation dependent" ?

Sort-of.  It is included non-normatively in the C specification as a
recommendation to C++ implementations.  C++98 didn't include these
macros at all, and thus had nothing to say on the subject.

Nevertheless, the latest revision of the C++ specification includes
these macros, and explicitly states that you do *not* need to define
__STDC_LIMIT_MACROS to get them.

Cheers,
-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)