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stdint.h question



Ralf Corsepius wrote:
> On Wed, 2007-05-02 at 20:14 -0700, Till Straumann wrote:
>   
>> Who has not encountered those (and other annoying)
>> warnings:
>>
>>  > warning: format '%x' expects type 'unsigned int', but argument 6 has 
>> type 'uint32_t'
>>
>> e.g., under linux (glibc) I don't get those but when porting code
>> to RTEMS I do. linux' stdint.h defines uint32_t as 'unsigned int'
>> (on a 32-bit machine) but RTEMS/newlib as 'unsigned long'.
>> (BTW: freebsd also uses int / unsigned int for int32_t / uint32_t
>> [i386, powerpc]).
>>     
> All random accidents. All such code doesn't comply to the standards.
>
>   
>> Does anybody have an idea how to properly deal with this?
>>     
> Use the macros from inttypes.h.
>   
You are right, thx.
Unfortunately, there still seems to be a bug in the newlib headers:
Compiling the snippet

#include <inttypes.h>
#include <stdio.h>

uintptr_t blah(void *arg)
{
uintptr_t rval = (uintptr_t)arg;
    printf("%"PRIxPTR"\n", rval);
    return rval;
}

produces:

tst.c: In function 'blah':
tst.c:7: warning: format '%llx' expects type 'long long unsigned int', 
but argument 2 has type 'uintptr_t'

I.e., the formatting macro expands to 'unsigned long long int' but 
uintptr_t is only 'unsigned int'
(which seems to be ok on a 32-bit machine).

(gcc 4.1.1, newlib 1.14.0)

-- Till
> Ralf
>
>
>