[PATCH] Fix 32-bit SSIZE_MAX

Eric Blake eblake@redhat.com
Thu Jul 14 18:39:00 GMT 2016

On 07/14/2016 09:09 AM, Corinna Vinschen wrote:
> On Jul 13 15:02, Eric Blake wrote:
>> POSIX requires that SSIZE_MAX have the same type as ssize_t, but
>> on 32-bit, we were defining it as a long even though ssize_t
>> resolves to an int.  It also requires that SSIZE_MAX be usable
>> via preprocessor #if, so we can't cheat and use a cast.
>> If this were newlib, I'd have had to hack _intsup.h to probe the
>> qualities of size_t (via gcc's __SIZE_TYPE__), similar to how we
>> already probe the qualities of int8_t and friends, then cross our
>> fingers that ssize_t happens to have the same rank (most systems
>> do, but POSIX permits a system where they differ such as size_t
>> being long while ssize_t is int).  Unfortunately gcc gives us
>> neither __SSIZE_TYPE__ nor __SSIZE_MAX__.  On the other hand, our
>> limits.h is specific to cygwin, we can just shortcut to the
>> correct results rather than being generic to all possible ABI.
>> Signed-off-by: Eric Blake <eblake@redhat.com>
>> ---
>>  winsup/cygwin/include/limits.h | 10 +++++++++-

> Looks good, please apply.

And I remembered to update the release notes, too.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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