Date: Mon, 28 Oct 2013 22:46:18 -0400 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Cc: Matthew Fernandez <matthew.fernandez@...ta.com.au> Subject: Re: printf format macros 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
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