Am Sonntag, 10. August 2014, 14:51:45 schrieb Georg Rudoy: > Hi, > > I'm thinking of converting a few ebuilds (x11-libs/qwt, > dev-libs/kqoauth, net-libs/qxmpp among them) to support building with > both Qt4 and Qt5. > > Should this better be done by adding the corresponding useflags (qt4 > and qt5 respectively) or by slotting? The pros and cons for each, off > the top of my head: > > slotting: > + Allows having different use flags for qt4 and qt5 builds (can't > think why that would be needed in the above examples though). > - Possibility of exponential growth of the number of slots in case > slotting would be required according to some other criteria (again, > can't think why that would be needed in the above examples). > - Requires keeping two different copies of the same ebuild with > basically the same build rules, with all the consequences. > > useflags: > + Seems to be easier and doing the required trick. > + app-text/poppler already does this. > - Enabling support for previously disabled Qt version requires > rebuilding the whole library twice. > > What's your opinion on this? > > I've attached the useflag-based variant as a draft.
Multibuild is prefered. -- Johannes Huber (johu) Gentoo Linux Developer / KDE Team GPG Key ID F3CFD2BD
