[PATCH] strftime: support %q to output the quarter of year

[Szabolcs Nagy]

On 04/11/16 12:00, Pádraig Brady wrote:
> On 04/11/16 11:41, Szabolcs Nagy wrote:
>> On 03/11/16 19:46, Pádraig Brady wrote:
>>> This is already supported by gnulib.
> 
>> why?
> 
> It's a marginal benefit, but as
> noted in the cover of my updated patch:
> 
> "Note even though the code is trivial here,
> %q is useful from the shell as there you need to:
> $(( ($(date +%-m)-1)/3+1 ))".
> 
> I'll add that to the actual commit.

this can conflict with future standard, so
there need to be a strong reason for adding
such extensions to portability libraries
such as gnulib or to c runtimes.

how does gnulib plan to deal with the conflict
once posix adds %q with different meaning?