I have updated qwt-5.1.0.ebuild to use the split Qt4 dependencies (See tracker bug #217161). It seems to work fine on ~x86 with only qt-core, qt-script and qt-gui installed, with and w/o svg USE flag.
Created attachment 153585 [details] qwt-5.1.0.ebuild for split Qt4 ebuilds
Previous qwt ebuilds might also require similar handling, as all of those previous versions of qwt ought to work with qt-4.4?
Comment on attachment 153585 [details] qwt-5.1.0.ebuild for split Qt4 ebuilds There are several issues with this ebuild. I will commit an improved qwt-5.1*.ebuild shortly as well as an ebuild for qwt-5.0*.