On 05/07/2012 01:43 PM, Michał Górny wrote: > On Mon, 07 May 2012 13:24:31 -0700 > Zac Medico <zmed...@gentoo.org> wrote: > >> On 05/07/2012 12:18 PM, Ulrich Mueller wrote: >>>>>>>> On Mon, 7 May 2012, Ciaran McCreesh wrote: >>> >>>> I propose: >>> >>>> REQUIRED_USE="== ( qt webkit )" >>> >>> But this just means that the ebuild has redundant USE flags, so one >>> of them shouldn't be in IUSE, in the first place. >> >> It serves to convey meaning, such that a user who has disabled the qt >> USE flag will get a meaningful prompt if that flag is required for >> webkit support. This kind of information could be useful to some >> people, and it may be preferable to having a separate webkit-qt flag. > > If 'qt' flag is required for webkit support, it's 'webkit? ( qt )'.
What if '!webkit? ( !qt )' also applies though? As an alternative to listing both constraints separately, you could combine them as '^^ ( webkit !qt )', or add support for '== ( qt webkit )' to make the expression easier to read. -- Thanks, Zac
