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ThreadLocal should not own the pointer it is managing because the use case in Mapbox GL is to keep a pointer to a stack allocated object, like: ``` MyObject foo; threadLocal.set(&foo); ``` To keep consistency, it is required that we clear the managed object before ThreadLocal gets destroyed by setting it to `nullptr`.
Mapbox Qt SDK
Developing
This is the foundation for the Mapbox GL plugin available since Qt 5.9. Use the Qt bugtracker for bugs related to the plugin and this GitHub repository for bugs related to Mapbox GL Native.
Linux
For Linux (Ubuntu) desktop, together with these build instructions, you also need:
sudo apt-get install qt5-default
macOS
For macOS desktop, you can install Qt 5 via Homebrew:
brew install qt5
Since Homebrew doesn't add Qt to the path, you'll have to do that manually before running any Make target:
export PATH=/usr/local/opt/qt5/bin:$PATH
We provide the following build targets for our Qt SDK:
Build instructions
Qt library
make qt-lib to build the qmapboxgl shared library. Public API headers
can be found in platform/qt/include folder.
QMapboxGL example application
make qt-app or make run-qt-app to run the application at the end of
build.