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From: hpa@zytor.com (H. Peter Anvin)
Subject: Re: printk and long long
Date: Wed, 11 Feb 2004 23:53:57 +0000 (UTC)
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References: <200402111604.49082.vda@port.imtp.ilyichevsk.odessa.ua> <yw1xvfmdwe4s.fsf@kth.se> <je8yj9cl27.fsf@sykes.suse.de> <yw1xn07pw6sy.fsf@kth.se>
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Followup to:  <yw1xn07pw6sy.fsf@kth.se>
By author:    mru@kth.se (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=)
In newsgroup: linux.dev.kernel
>
> Andreas Schwab <schwab@suse.de> writes:
> 
> > mru@kth.se (Måns Rullgård) writes:
> >
> >> What is the proper way to deal with printing an int64_t when int64_t
> >> can be either long or long long depending on machine?
> >
> > PRId64 from <inttypes.h> (replace d with the desired format character).
> > This is for user space, not sure whether that is acceptable for kernel
> > code (<intttypes.h> is not one of the required headers for freestanding
> > implementations).
> 
> That should work for userspace.  What standard specifies those?
> What about kernel sources?
> 

C99 defines those.

Another (frequently easier) way is to cast to (intmax_t) and use the %j size modifier:

	printf("foo = %jd\n", (intmax_t)foo);

	-hpa
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