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Re: [PATCH 2/3] Move register_t to system-specific header
----- Am 14. Feb 2019 um 15:02 schrieb Corinna Vinschen vinschen@redhat.com:
> On Feb 14 11:15, Sebastian Huber wrote:
>>
>>
>> ----- Am 13. Feb 2019 um 21:28 schrieb Corinna Vinschen vinschen@redhat.com:
>>
>> > On Feb 13 20:01, Sebastian Huber wrote:
>> >> ----- Am 13. Feb 2019 um 18:06 schrieb Corinna Vinschen vinschen@redhat.com:
>> >>
>> >> > On Feb 13 14:19, Sebastian Huber wrote:
>> [...]
>> >> If I change the type to __intptr_t wounldn't this break ABI
>> >> compatibility on Cygwin?
>> >
>> > In how far? Cygwin's 64 bit ABI is LP64.
>>
>> The type for register_t changes from int to __intptr_to, so 32-bit to 64-bit on
>> LP64.
>
> register_t is not used in Cygwin itself. I don't know its purpose,
> actually. If it has been defined as 32 bit type on 64 bit, wasn't that
> a bug and thus unusable before?
Yes, a 32-bit register_t type on an LP64 system is a bug. It is used in some situations like intptr_t in FreeBSD.