h8300, m32c and PRIuPTR
Mon Mar 16 15:08:00 GMT 2015
On 3/16/2015 9:10 AM, Eric Blake wrote:
> On 03/16/2015 04:22 AM, Nicholas Clifton wrote:
>> Hi Joel,
>>> The warning is:
>>> f.c:6:3: warning: format '%u' expects argument of type 'unsigned int',
>>> but argument 2 has type 'uintptr_t' [-Wformat=]
>>> printf( "%" PRIuPTR "\n", x );
>>> Any ideas on how to address this?
>> How about using an explicit widening cast, as in:
>> printf ("%lu\n", (unsigned long) x);
>> I am assuming that sizeof (uintptr_t) <= sizeof (unsigned long) will
>> always be true, but that seems reasonable to me.
> Not on 64-bit mingw (where sizeof(long)==4, sizeof(uintptr_t)==8). But
> yes, explicitly widening to a known type can work around cases where you
> are otherwise stumped, although for this particular code, it looks like
> PRIuPTR is misdefined for your platform.
And we don't want to add casts. We just want to use the PRIxxx constants
to have portable printf formats and avoid warnings.
I am wondering if when we avoided changing newlib-stdint.h to match the
in glibc-stdint.h for uintptr_t by adding configure time logic, we just
off the problem. At this point, all I can see as a solution is something
#if defined(__m32c__) || defined(__h8300__)
/* do whatever is needed */
/* we can rely on the value provided by configure, use current logic */
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill@OARcorp.com On-Line Applications Research
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