* Szabolcs Nagy <nsz@port70.net> [2015-09-20 18:44:35 +0200]:
> * Rich Felker <dalias@libc.org> [2015-09-20 12:36:29 -0400]:
> > On Sun, Sep 20, 2015 at 02:44:50PM +0200, Szabolcs Nagy wrote:
> > > out of range tm fields should not be treated as ub
> > > as noted in the thread
> > > http://sourceware.org/ml/libc-alpha/2015-09/msg00546.html
> > > 
> > > i have a patch but there might be simpler approaches
> > 
> > Wouldn't it be less invasive to just make some small changes like
> > putting a U on some of the constants so that the arithmetic happens as
> > unsigned?
> > 
> 
> that might be simpler (and probably generates better
> code for div,mod by const)
> 
> but for the nl_langinfo item computation the range
> has to be limited properly (tm_wday and tm_mon are
> affected).

implemented this approach with wday%7U and using some 0U+