从Qt 5.15开始，Qt公司决定更改之前的开发包提供方式了。
详细内容可以参考 这个链接 内容。
最大的变化就是，二进制安装包只针对于商业版本，开源版本只能自己编译或者下载使用别人编译好的（估计现在2020-7-22已经有人提供了）。
反正公司是买卖，又不是公益，做到这样子，也就知足了。
从 这个页面 可以下载到一个900+M的源代码包和子模块的源代码。
抓取了子模块的源代码页面，把zip文件列了在下面，总算有个交代。复制到粘贴板后迅雷会自动识别并下载，祝好。
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtxmlpatterns-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtx11extras-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwinextras-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwebview-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwebsockets-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwebglplugin-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwebengine-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwebchannel-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtwayland-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtvirtualkeyboard-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qttranslations-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qttools-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtsvg-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtspeech-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtserialport-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtserialbus-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtsensors-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtscxml-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtscript-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtremoteobjects-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquicktimeline-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquickcontrols2-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquickcontrols-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquick3d-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtpurchasing-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtnetworkauth-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtmultimedia-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtmacextras-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtlottie-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtlocation-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtimageformats-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtgraphicaleffects-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtgamepad-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtdoc-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtdeclarative-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtdatavis3d-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtconnectivity-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtcharts-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtbase-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtandroidextras-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtactiveqt-everywhere-src-5.15.0.zip
http://download.qt.io/archive/qt/5.15/5.15.0/submodules/qt3d-everywhere-src-5.15.0.zip
