Compiling Qt6 with wayland and rasberry pi support requires EGL/eglext_brcm.h

git clone git@github.com:qt/qt5.git

./init-repository -f --module-subset=qtbase,qtwayland,qtdeclarative,qtimageformats,qtlanguageserver,qtshadertools,qtsvg
 

git checkout 6.4.2

 cmake ../qt5/ -GNinja -DCMAKE_BUILD_TYPE=Release -DQT_BUILD_EXAMPLES=OFF -DQT_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$QTBUILDROOT/qt-host/ -DFEATURE_xcb=OFF -DBUILD_qtwayland=ON -DQT_FEATURE_eglfs_brcm=ON -DQT_FEATURE_opensslv11=ON -DQT_FEATURE_accessibility_atspi_bridge=OFF
 

cmake --build . --parallel 8

 [95/471] Building CXX object qtwayland/src/plugins/hardwareintegration/client/brcm-egl/CMakeFiles/QWaylandBrcmEglClientBufferPlugin.dir/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp.o FAILED: qtwayland/src/plugins/hardwareintegration/client/brcm-egl/CMakeFiles/QWaylandBrcmEglClientBufferPlugin.dir/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp.o /usr/bin/c++ -DQT_CORE_LIB -DQT_DEPRECATED_WARNINGS -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_GUI_LIB -DQT_NO_AS_CONST=1 -DQT_NO_CONTEXTLESS_CONNECT=1 -DQT_NO_DEBUG -DQT_NO_EXCEPTIONS -DQT_NO_FOREACH -DQT_NO_FOREACH=1 -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QASCONST -DQT_NO_QEXCHANGE -DQT_NO_QSNPRINTF -DQT_NO_STD_FORMAT_SUPPORT -DQT_PLUGIN -DQT_USE_QSTRINGBUILDER -DQT_WAYLANDCLIENT_LIB -DQT_WAYLANDGLOBAL_LIB -DQWaylandBrcmEglClientBufferPlugin_EXPORTS -D_GLIBCXX_ASSERTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/include  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt5/qtwayland/src/plugins/hardwareintegration/client/brcm-egl  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtCore  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt5/qtbase/mkspecs/linux-g++  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtGui  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/client  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandClient/6.10.0  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandClient/6.10.0/QtWaylandClient  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/src/corelib  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtCore/6.10.0  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtCore/6.10.0/QtCore  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/src/gui  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtGui/6.10.0  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtGui/6.10.0/QtGui  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandGlobal  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt5/qtwayland/src  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandGlobal/6.10.0  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandGlobal/6.10.0/QtWaylandGlobal  -I/home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtbase/include/QtWaylandClient  -DNDEBUG -O2 -std=gnu++17 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -Wno-expansion-to-defined -fPIC -U_FORTIFY_SOURCE -Wsuggest-override -fcf-protection=full -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fstack-clash-protection -fno-exceptions -MD -MT qtwayland/src/plugins/hardwareintegration/client/brcm-egl/CMakeFiles/QWaylandBrcmEglClientBufferPlugin.dir/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp.o -MF qtwayland/src/plugins/hardwareintegration/client/brcm-egl/CMakeFiles/QWaylandBrcmEglClientBufferPlugin.dir/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp.o.d -o qtwayland/src/plugins/hardwareintegration/client/brcm-egl/CMakeFiles/QWaylandBrcmEglClientBufferPlugin.dir/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp.o -c /home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp 
In file included from /home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/EWIEGA46WW/../../../../../../../../../qt5/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/qwaylandbrcmeglwindow.h:8,                  from /home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/EWIEGA46WW/moc_qwaylandbrcmeglwindow.cpp:9,                  from /home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/mocs_compilation.cpp:2: /home/tommy/projects/rPi4_OS/crossCompile/qt6/qt5ReproQt6CodeAndBuild/qt-hostbuild/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/QWaylandBrcmEglClientBufferPlugin_autogen/EWIEGA46WW/../../../../../../../../../qt5/qtwayland/src/plugins/hardwareintegration/client/brcm-egl/qwaylandbrcmeglintegration.h:14:10: fatal error: EGL/eglext_brcm.h: No such file or directory    14 | #include <EGL/eglext_brcm.h>       |          ^~~~~~~~~~~~~~~~~~~ compilation terminated. [97/471] Building CXX object qtwayland/src/compositor/CMakeFiles/WaylandCompositor.dir/waylandcompositor_qmltyperegistrations.cpp.o