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Re: [lwip-devel] [bug #54190] Minor compile warnings under newly-release

From: Ray Ozzie
Subject: Re: [lwip-devel] [bug #54190] Minor compile warnings under newly-released IAR EWARM 8.30.1
Date: Mon, 2 Jul 2018 17:00:41 +0000
User-agent: Microsoft-MacOutlook/10.e.1.180613

I don't know if this is precisely how you would have made the changes, but 
attached are four files based on 2.0.3 that do successfully eliminate the 

After testing, I found that I could eliminate the warning either by a) masking 
with an appropriate mask, or b) casting to the appropriate data type.

Since I found other places in the code that defined symbols with a suffix 
_FLAGS that represented "all possible flags", I went with that approach under 
the assumption that this would be your preference.

Four files based on 2.0.3:

Thank you for your consideration.


On 6/28/18, 3:25 PM, "Simon Goldschmidt" <address@hidden> wrote:

    Follow-up Comment #3, bug #54190 (project lwip):
    On 27.06.2018 22:12, Ray Ozzie wrote:
    > I apologize for not being able to make this easier. 
    > Although I haven’t tested any fixes myself, it appears that the core issue
    is the technique of generating a ~ mask from a constant (Ie interpreted by 
    compiler as size_t or whatnot), and then assigning the masked value into
    something smaller (ie uint8) is flagged as potentially losing significant
    bits. I believe a cast may be needed on all these mask ops. 
    > If you have anything you’d like me to try, I’m happy to take the fix and
    tweak it as necessary and get it back to you. 
    > Thanks much. 
    Reply to this item at:
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