Qt 5 private headers

Hi, I've just noticed that there are not separate packages for private headers of Qt 5 in Fedora but there is one for Qt 4. Also I've checked specs of some packages like qt5-qtdeclarative which uses private headers during the compilation and their rpms depends on qt5-qtbase >= ${qt5_version} instead of qt5-qtbase == ${qt5_version} which may be source of various errors (because Qt doesn't guarantee API/ABI compatibility for private headers). Is it made on purpose and how does Fedora guarantee that nothing breaks in case of Qt's minor/patch updates? -- Ruslan Nigmatullin