03 编译QT_buildroot 编译qt

编译配置

buildroot 中选择必要的模块，进行编译，注意生成的文件大小以及添加模块时需要重新编译；

尽量选择编译例子

配置环境变量，指定依赖

通常遇到错误提示基本属于环境变量配置问题。

qt.qpa.plugin: Could not find the Qt platform plugin "eglfs" in "/usr/lib/qt/plugins/platforms"
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export QT_QPA_PLATFORM=linuxfb:fb=/dev/fb0 
echo QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/qt/plugins/platforms

# export QT_DEBUG_PLUGINS=1
# export QTDIR=
# export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH
# export QT_PLUGIN_PATH=
# export QT_QPA_FONTDIR=/usr/share/fonts/ttf
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