DIconTheme::createIconEngine for qt5integration
1. try createBuiltinIconEngine first
2. try createXdgProxyIconEngine or fallback to fromTheme
3. add docs
Warning : do not call from qplatformTheme createIconEngine without
DontFallbackToQIconFromTheme flag
Log: add createIconEngine
I change the source code from qmake to cmake. Move the files
which will be install to the /usr/include to $root/include, which will
help to mattern match and easylier to do install. and the change will
break the build of qmake
Log: from qmake to cmake
Influence: qmake is breaked
ck
wangfei
ck
ShootingStarDragons