Avoid crash when QOpenGLContext is destroyed before the VAO

Change-Id: I19df59453156a95c5075a065268333a74cec2476
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Deprecate Mac libc++ mkspecs

We handle C++11 and libc++ through c++11.prf now, so separate mkspecs
are not needed. Deprecating them allows us to remove them in a later
release.

Change-Id: I4e525f445aeab88c926fa62cedef6aa9b32a7f55
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
QWindow min/max width/height, contentOrientation are not new in 5.1

so that part of Id03ae17270832a7b5915e4324a508e591c0b6d98 which added
the Q_REVISION(1)'s and \since docs was a mistake.

Change-Id: I159b68491bd7dc55657d8c978bff527094ef4547
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Add Q_REVISION(1) to QWindow::alert().

Task-number: QTBUG-32069
Task-number: QTBUG-30416

Change-Id: Idabf9962def24ecd709be7d981302c91c42ccac4
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
fix location of private headers in mac bundles

Change-Id: I2d9f117d4b25df878abc525499748ed1df9b9c18
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
install qpa headers into frameworks as well

they are a somewhat different kind of private headers, but follow
generally the same logic.

Change-Id: Ic6f42ed7061dde2ffd0e32b1d713354b58a20970
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
remove qt_no_framework_direct_includes from qt build

only the include statements found in public headers are constrained to
work with this flag. our own c++ files and private headers can use other
styles, which this flag breaks.

Change-Id: Icb1ced17dc438083731049788ac28349c87ba7ef
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>