From: Rich Felker <dalias@aerifal.cx>
To: musl@lists.openwall.com
Cc: Matthew Fernandez <matthew.fernandez@nicta.com.au>
Subject: Re: printf format macros
Date: Mon, 28 Oct 2013 22:46:18 -0400 [thread overview]
Message-ID: <20131029024617.GS20515@brightrain.aerifal.cx> (raw)
In-Reply-To: <526F1D46.30604@nicta.com.au>
On Tue, Oct 29, 2013 at 01:28:22PM +1100, Matthew Fernandez wrote:
> Hi all,
>
> This may be a silly question, but why does there seem to be no 64-bit
> compatibility in the printf macros in inttypes.h? The relevant section is:
>
> 25 #if UINTPTR_MAX == UINT64_MAX
> 26 #define __PRI64 "l"
> 27 #else
> 28 #define __PRI64 "ll"
> 29 #endif
>
> as compared to Glibc's:
>
> 49 # if __WORDSIZE == 64
> 50 # define __PRI64_PREFIX "l"
> 51 # define __PRIPTR_PREFIX "l"
> 52 # else
> 53 # define __PRI64_PREFIX "ll"
> 54 # define __PRIPTR_PREFIX
> 55 # endif
>
> We use Musl C on 32- and 64-bit platforms and I'm looking for a way to
> write printf format strings word-length-independently in an application.
> I'm not currently subscribed to the list so please CC me personally when
> replying.
I was at first confused, but it looks like the PRI?PTR macros are
incorrect on musl for 32-bit archs. At worst you'll get warnings, so
you can use them all correctly right now, but it's something we should
fix before the next release.
Rich
prev parent reply other threads:[~2013-10-29 2:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 2:28 Matthew Fernandez
2013-10-29 2:46 ` Rich Felker [this message]
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