Re: [PATCH] uapi: Make __{u,s}64 match {u,}int64_t in userspace

[Alejandro Colomar (man-pages)]

On 11/23/21 20:50, Florian Weimer via Libc-alpha wrote:
> * Cyril Hrubis:
>
> > As far as I can tell the userspace bits/types.h does exactly the same
> > check in order to define uint64_t and int64_t, i.e.:
> >
> > #if __WORDSIZE == 64
> > typedef signed long int __int64_t;
> > typedef unsigned long int __uint64_t;
> > #else
> > __extension__ typedef signed long long int __int64_t;
> > __extension__ typedef unsigned long long int __uint64_t;
> > #endif
> >
> > The macro __WORDSIZE is defined per architecture, and it looks like the
> > defintions in glibc sources in bits/wordsize.h match the uapi
> > asm/bitsperlong.h. But I may have missed something, the code in glibc is
> > not exactly easy to read.
>
> __WORDSIZE isn't exactly a standard libc macro.

The (to-be) standard libc macro would be LONG_WIDTH (although it has a 
slightly different meaning, but it can be used for this, but then the 
code also needs to expose <limits.h>), rigth?

Regards,
Alex

--
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/