Make nativeOrientation available in the public API

The QtSensors module defines the coordinate system relative to
QPlatformScreen::nativeOrientation(). However, that is not part
of the public Qt API.

Task-number: QTBUG-32144

Change-Id: I6941c5b8589219064749f18880775b803f23fbbd
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Remove unused QPF font engine support.

QWS is gone.

Change-Id: Ic04c4dcfff51522dd538bf2cb198dc2e02fe7572
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Reviewed-by: Peter Kümmel <syntheticpp@gmx.net>
Optimize QBitArray::count(bool)

Ever since 76e0223619da02911d02813961ef631a5e02d826, qPopulationCount
was extracted from QBitArray and moved elsewhere. That unfortunately
meant that the 24-bit loads are completely useless, since
qPopulationCount always operates on 32 bits.

Instead, do a full loop on 32-bit and then do 16-bit and finally 8-bit
(for which there are qPopulationCount overloads).

Change-Id: If945609f075095257d12877c39434909ac190e54
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Don't use an extension to the C++ language in public headers

According to Clang 3.3, this is an extension:
qpalette.h:178:9: error: anonymous types declared in an anonymous union are an extension [-Werror,-Wnested-anon-types]
qsizepolicy.h:148:9: error: anonymous types declared in an anonymous union are an extension [-Werror,-Wnested-anon-types]

If you try to simply give the struct a name, it complains with:
qpalette.h:178:16: error: types cannot be declared in an anonymous union

Change-Id: I61c69b8e42a1f4c4a15a0733f2d7efa0b3e44864
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Add a note on symlink behavior of QFile::exists

Change-Id: I41ede0536f1b7093a7cde3d74a5e221df413aeea
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Add a static QFileInfo::exists(fileName) function

This avoids dynamic construction of the private class. According to
the benchmark we go from 4,550 to 3,900 instruction reads per iteration.
(without change 32629676 the baseline is 5,600)

Change-Id: I5df925e30dbd49bdde87173e481820574ce5abe1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>