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Date: Tue, 14 Jan 2014 20:36:36 +0000 (UTC)
From: David Wuertele <dave+gmane@...rtele.com>
To: musl@...ts.openwall.com
Subject: Am I using PRIxPTR wrong? Musl-libc complains, glibc doesn't
/* test.c - demo difference between glibc and musl-libc wrt PRIxPTR
**
** Both native (x86_64 glibc) and target (arm musl-libc) define
** PRIxPTR as "lx", but uintptr_t as unsigned int:
**
** $ gcc -E test.c | grep uintptr_t
** typedef unsigned long int uintptr_t;
** printf ("main is at 0x%""l" "x""\n", (uintptr_t) main);
**
** $ arm-linux-musleabishf-gcc -E test.c | grep uintptr_t
** typedef unsigned int uintptr_t;
** printf ("main is at 0x%""lx""\n", (uintptr_t) main);
**
** While native gcc doesn't complain, target gcc does:
**
** $ gcc -c test.c -Wformat
**
** $ arm-linux-musleabishf-gcc -c test.c -Wformat
** test.c: In function ‘main’:
** test.c:6:3: warning: format ‘%lx’ expects argument of type
** ‘long unsigned int’, but argument 2 has type ‘unsigned int’ [-Wformat]
*/
#include <stdio.h>
#include <inttypes.h>
int
main (int ac, char *av[])
{
printf ("main is at 0x%"PRIxPTR"\n", (uintptr_t) main);
return 0;
}
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