First draft of the Y2038 design document

[Paul Eggert]

On 10/27/2015 03:42 PM, Rich Felker wrote:
> This is only a requirement when executing the standard utilities or
> calling functions which depend on TZ.

No, it's a requirement that conforming applications cannot set TZ to a 
value like "right/America/Los_Angeles", at all times. This is not a 
requirement that a conforming application can blithely ignore merely 
because it's currently executing certain functions. This is clearly 
stated in the environment-variable section.

> In any case glibc does not do this but just
> gets it wrong on the matter of permitted vs forbidden side efficts.

This seems to be veering into a different area, where perhaps there is a 
glibc bug (presumably which can be illustrated by using only 
POSIX-specified TZ values), but that's a different matter.