On Sat, 3 Dec 2016, Rich Freeman wrote:
On Sat, Dec 3, 2016 at 9:47 AM, William L. Thomson Jr.
<wlt...@o-sinc.com> wrote:
On Saturday, December 3, 2016 9:33:00 AM EST Michael Orlitzky wrote:
On 12/03/2016 09:25 AM, William L. Thomson Jr. wrote:
This is generally considered infeasible:
I would not think such, just need a wrapper to run around each package
that
would get its USE flags and re-emerge it a few times.
If a package has 10 USE flags, and if each can be set on/off with no
constraints, then that gives you 2^10 different ways to emerge it.
May make the requirements of the host system larger or take more time. I am
sure processing power could handle that load.
Would be nice if someone like Google would sponsor such efforts. They have
enough hardware and cloud services to make such feasible.
Have you given thought to how long it would take the largest
supercomputer in the world to rebuild libreoffice once for each of the
2^28 USE flag combinations it has (not including USE_EXPAND)?
It is certainly possible, but I doubt that you're going to get it
dedicated to Gentoo for a few weeks whenever one of its deps changes.
This is not a reason to give up on tinderboxing. This is just a
reason to be realistic about just what it will do.
I recall some discussion about tinderboxing suggesting that more important
than testing all possible use flag combinations, would be to test:
* all use flags disabled (some packages fail miserabily if you don't
enable at least one use flag)
* all use flags enabled (good to detect conflicts)
* default use flags (rely on IUSE defaults - even better if you test it
on different profiles to see the impact)
* a set of use flags defined by maintainer (mysql ebuilds have a set of
USE flags for maintainers to test them)
Regards,
Jorge Manuel B. S. Vicetto
Gentoo Developer
