Re: NSK(OSS) compilation problem

[mwoehlke]

Paul Eggert wrote:
> mwoehlke <address@hidden> writes:
>
> > I have a problem building on Tandem/NSK OSS; specifically, uintmax_t
> > (unsigned long long) is not a valid data type (don't ask me why!).
>
> Sorry, but we've gotta ask why.  Why isn't it a valid data type?
> Does the compiler reject 'unsigned long long int x;'?  Or does
> it mishandle code generated with that type?  Or what?

If you read the bottom of my original post, I already answered that:
"Unsigned long long: The C++ standard does not specify the long long 
integer data type; however, it does state that signed integer data types 
should have an unsigned counterpart. None of the compilers on the TNS/R 
platform define an unsigned 64-bit data type, and C++ is no exception."

"*None of the compilers... define an unsigned 64-bit data type...*" If 
you want to know /why/ they don't, you'll have to ask HP.

> > I am thinking about changing this to 'long long',
>
> That would break a lot of code.  I wouldn't do it.
>
> > Would it be better to change it to 'unsigned long' instead?
>
> uintmax_t should be the widest unsigned integer type that works.
> If that's 'unsigned long int', then you should use 'unsigned long int'.
>
> C does not require that uintmax_t and intmax_t must have the same
> width.  However, I suspect that some gnulib code does assume that
> uintmax_t is wide enough to represent any nonnegative integer value,
> which means you may run into trouble if intmax_t, off_t, etc.  are
> wider than uintmax_t.

So what would be your recommendation? Remove all use of 64-bit integers? 
(i.e. make intmax_t also 'long' rather than 'long long'?) And I wonder 
why I don't remember running into this with 5.97?

> > Also, I don't remember this problem with 5.97 (but I could be wrong);
>
> I think there may be some problems with files that double-include
> <config.h>.  That is a no-no nowadays, since <stdint.h> redefines
> uintmax_t and the like.  I'll try to look into it.

Thanks. (Hmm, that sounds like you got off on a tangent talking about my 
Tru64 problem?)

--
Matthew
"What's Cygwin?" you ask.
'Tis mostly absurd software
Concerning hippos.