Re: [For help] rdma-roce build quesiton

[oulijun <oulijun-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>]

在 2016/10/27 0:09, Jason Gunthorpe 写道:
> On Wed, Oct 26, 2016 at 03:23:38PM +0800, oulijun wrote:
> 
>> the build is fail and the print log as follows:
>>
>> error: size of unnamed array is negative
>> attr->cap.max_recv_wr = min(context->max_qp_wr, attr->cap.max_recv_wr);
> 
> It is telling you the types are not the same, and this is a source of bugs
> as C has some counter intuitive rules regarding type promotion.
> 
> 1) Audit max_qp_wr and max_recv_wr to see if they really should be
>    different types, if not fix context->max_qp_wr to match
> 
> 2) If they are legitimately different then use
> 
>   min_t(<desired type>, context->max_qp_wr, attr->cap.max_recv_wr);
> 
> Think carefully about what common type is used because both arguments
> will be casted, and the goal is to avoid a loss of precision or
> signdedness in the cast.
> 
> Jason
> 
> .
> 
thanks, I see it.

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