[PATCH/AARCH64 1/6] Fix size and pointer different types for ILP32.

[Andrew Pinski]

On Tue, Dec 10, 2013 at 3:23 AM, Marcus Shawcroft
<marcus.shawcroft@gmail.com> wrote:
> On 3 December 2013 21:24, Andrew Pinski <pinskia@gmail.com> wrote:
>>
>> While compiling some programs, GCC and glibc (and newlib)'s definitions of size_t
>> were not agreeing and causing format warnings to happen.  The simple testcase for this is:
>> #include <stdio.h>
>> #include <stdint.h>
>>
>> int main(void)
>> {
>>   ssize_t t = 0x1;
>>   printf("%zd\n", t);
>>   return 0;
>> }
>
> Hi Andrew,
>
> The PCS IHI0056C defines SIZE_TYPE as 'unsigned long' for both ILP32
> and LP64 and PTRDIFF_TYPE as "signed long" for both ILP32 and LP64.
> This seems like a sane choice to me.
>
> Trying to recreate the failure with the test fragment above doesn't
> given a warning:
>
> $ aarch64-none-elf-gcc -Wall -mabi=ilp32 test-size_t.c -specs=rdimon.specs
> $ aarch64-none-linux-gnu-gcc -Wall -mabi=ilp32 test-size_t.c -c
> $
>
> ..what am I doing differently to your test run?

I found out it was a bug in glibc where it defines __SSIZE_T_TYPE to
__SWORD_TYPE (int for ilp32 and long for lp64) rather than
__SLONGWORD_TYPE (long always).
I have fix for when I submit the glibc patches.

Thanks,
Andrew Pinski

>
> Cheers
> /Marcus