[Coin-discuss] BCP with Xpress under cygwin

[Laszlo Ladanyi]

On Wed, 11 Oct 2006, Andreas Waechter wrote:

> Hi Laci,
> 
> > As temporary fix in your own copy just go into CoinUtils/src and modify
> > CoinTypes.hpp to define a 64 bit integer to something on the non-MSC_VER part
> > of the test. My guess is that
> >    typedef long long int64_t;
> > will work.
> >
> > Andreas, can you add a macro that figures out what type provides 64-bit
> > integers (and what needs to be included to get it) and in CoinTypes.hpp we
> > could use the result of that?
> 
> Well, I don't think all systems necessarily have a 64bit integer. 
> Usually, the header stdint.h is supposed to declare integer types, but 
> even the IEEE standard doesn't necessarily know about 64bit:
> 
> http://www.opengroup.org/onlinepubs/000095399/basedefs/stdint.h.html
> 
> I suggest instead to correct the CoinIndexedVector.cpp file so that it 
> does not use platform dependent types.  This seems to be the only place 
> where int64_t appears.
> 
> Cheers
> 
> Andreas

OK, so what to do when ther *is* a 64-bit integer? Pretty much every platform
provides it in some form, even if it is not part of the standard. Granted, in
our code we should use CoinInt64 or something similar, but if there is a
native 64-bit int on the platform then it should just be a simple typedef. 
And for the odd platform that does not provide such type we can code it up in
any ugly inefficient way.

What do you think? (Besides that I'm so good at giving work to others :-).

--Laci

PS: If you'd like I can try to cook up a test...

> 
> >
> > Thanks,
> > --Laci
> >