Re: [boost] numeric-ublas errors with Comeau

From: Jonathan Wakely (cow_at_[hidden])
Date: 2004-08-23 05:19:13

On Mon, Aug 23, 2004 at 11:48:17AM +0200, Bronek Kozicki wrote:

> Michael Stevens wrote:
> >The problem appears to be the old std::abs is not defined for built in 
> >types.
> >I sure the problem will non exist for ever in the Comeau  library. It 
> >could also be due to the --vc71 compatibility flag being set.
> 
> Hi
> 
> again me :) This error goes away if you #include <cstdlib> in 
> boost/numeric/ublas/traits.hpp (see attached patch) , no need to update 
> boost/boost/numeric/ublas/config.hpp .
> 
> I've checked in standard (ISO/IEC 14882:2003, clause 26.5) and it seems 
> that both headers <cstdlib> and <cmath> are required to have full set of 
> overloads of std::abs (I asked on comp.std.c++ if it's intended). Anyway 
> I will send support request to Comeau asking about absence of float 
> version in <cmath> .

See http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-closed.html#323

Also, http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#295,
although that's not actually related, it just seems to be at first
glance.

jon

-- 
"Everything to excess!  To enjoy the flavor of life, take big bites.  
 Moderation is for monks."
	- Robert Heinlein