--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qt-cross-build.txt	Tue May 09 11:44:58 2023 +0300
@@ -0,0 +1,25 @@
+# In Debian 9+
+apt-get install mingw-w64
+
+
+# Clone Qt5 base git repo:
+git clone https://code.qt.io/qt/qt5.git qt5-src
+cd qt5-src/
+
+# Checkout desired version
+git checkout 5.12
+
+# Initialize subrepos, we need just qtbase
+./init-repository -f --module-subset=qtbase
+git checkout v5.12.6
+git submodule update
+
+# Configure for cross-compilation
+./configure -release -opensource -nomake examples -nomake tests -xplatform win32-g++ -device-option CROSS_COMPILE=i686-w64-mingw32- -opengl desktop
+
+# Qt5 requires this Windows 10 -specific header file
+wget https://raw.githubusercontent.com/tpn/winsdk-10/master/Include/10.0.10240.0/um/UIViewSettingsInterop.h
+	-O /usr/i686-w64-mingw32/include/
+
+# Build it
+make -j8