[OE-core] [PATCH] sstate.bbclass: preserve time when unstaging files

[Enrico Scholz]

Richard Purdie <richard.purdie at linuxfoundation.org> writes:

>> >> But the real bug is the time mismatch in the autobuilders, isn't it?
>> >> And this can/should be solved by synchronizing time by ntp on them
>> >> instead of applying dirty hacks like resetting file dates.
>> ...
>> > Worse, when this does happen the failures are extremely unpredictable
>> > and hard to debug. It causes things to repeatedly recompile for example,
>> > even during do_install.
> ...
> Set the date stamp of some headers in the target sysroot of some key
> system components (say glib) to a date about a day in the future,

Are there really packages which create files dated in the future?
Perhaps a sanity check should be written which rejects files which are
newer than their containing directory and/or the time-of-day?


> then clean and rebuild some software that uses glib.

How will 'tar -m' fix this?  It makes things just worse because the
files generated with -m are always newer than without -m (in practice,
time offset between hosts served by ntp is far below 100ms. which is
enough for the build stages doing the sstage file extraction).




Enrico