Building Qt for iOS from sources requires Xcode with command-line tools installed. This can be done within Xcode from Preferences > Downloads > Components > Command Line Tools.

Qt sources can be obtained either by cloning the repositories or downloading the source package(s).

We can then configure and build Qt. This is done from the Qt top directory:

> ./configure -xplatform macx-ios-clang -release -qt-host-path <path_to_host_qt_installation>

For other configure options, see Qt Configure Options.

Then, simply run cmake --build . --parallel.

Note: A default build will include both simulator and device libraries. If you want to build for a single target, use the -sdk argument with either iphoneos or iphonesimulator.