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BCM7425 Qt4dot8 eglfs QPA | Qt Wiki | Qt Project

Building AppLibs/RefSW for Qt

  1. Locate document named “BroadcomReferencePlatformSetup.pdf” (Usually this will be inside a tar ball named on the lines of refsw_release_<chip-name>_<date>.tgz)
  2. Follow the instructions in “BroadcomReferencePlatformSetup.pdf” to setup the Linux build machine
  3. Locate document named “AppLibsInstallationBuildGuide.pdf” (Usually this will be inside a tar ball named on the lines of applibs_release_<date>.tgz)
  4. Follow the instructions in “AppLibsInstallationBuildGuide.pdf” to build Applibs

Qt 4.8 eglfs / QPA

  1. Obtain qt-4.8.0 release from Qt Download site [] and extract it in a working folder
  2. Obtain 7425 specific files from qt-platform-mkspecs git [] (look for folder “4.8”)
  3. Copy folder named “linux-7425nxs-mipsel-uclibc-g++” to <qt-4.8.0-sources>/mkspecs/qpa
  4. Set following environment variables in the shell before configuring/building Qt,
    • BCM_APPLIBS_PATH=<path-till-Applibs-folder>/AppLibs
    • BCM_NEXUS_PATH=<path-till-Applibs-folder>/nexus
    • DEBUG=n
    • for example,
    • $ export BCM_APPLIBS_PATH=/home/qtnokia/WorkDir/97425-P1/stb-rs_p2-al_p2dot1/AppLibs
    • $ export BCM_NEXUS_PATH=/home/qtnokia/WorkDir/97425-P1/stb-rs_p2-al_p2dot1/nexus
  5. Apply patch “7425nxs-eglfs.patch” to eglfs Qt Lighthouse Driver located at <qt-4.8.0-sources>/src/plugins/platforms/eglfs
    • $ cd <qt-4.8.0-sources>/src/plugins/platforms/eglfs
    • $ patch -p4 < 7425nxs-eglfs.patch
  6. Configure Qt as,
    • $ configure -qpa -arch mips -xplatform qpa/linux-nxs-mipsel-uclibc-g++ -depths 16,24,32 -no-largefile -no-accessibility \
    • -opensource -verbose -system-zlib -system-libpng -system-libjpeg -system-freetype -fast -opengl -webkit -confirm-license \
    • -release -make libs -xmlpatterns -exceptions -no-qt3support -prefix /usr/local/qt-installs/qt480ga-nxs-qpa-rel
  7. Build Qt as,
    • $ make
  8. Install Qt on host as,
    • $ make install

Building Qt apps

  1. After the Qt build succeeds, set following environment variables on host before building any fullscreen OpenGL Qt App for the above build,
    • QTDIR=/usr/local/qt-installs/qt480ga-nxs-qpa-rel
    • PATH=/usr/local/qt-installs/qt480ga-nxs-qpa-rel/bin:$PATH
  2. Ensure that following environment variables in the shell are set,
    • BCM_APPLIBS_PATH=<path-till-Applibs-folder>/AppLibs
    • BCM_NEXUS_PATH=<path-till-Applibs-folder>/nexus
    • BCM_TARGET_LIBDIR=<path-till-nfsrootfs-base-folder>/romfs/lib
    • DEBUG=n
  3. Invoke qmake on the applications .pro file (<qt-4.8.0-sources>/examples/opengl/hello_gles2)
    • $ qmake <application>.pro
  4. Build the application sources as,
    • $ make

Running Qt apps on target

  1. Ensure that folder “qt-installs/qt480ga-nxs-qpa-rel” is copied on target file system at “/usr/local”
    • Note – after copying, the path should appear as “/usr/local/qt-installs/qt480ga-nxs-qpa-rel”
  2. Copy the application binary and other required resource files on target file-system, say “/root”
  3. Locate a shell script named “start” in “/bin” folder on target.
  4. Copy it in your app folder and edit the paths inside it.
  5. Launch application using same “start” script as,
    • # ./start /root/app1/app1 -platform eglfs

NOTE: Before executing any Qt applications on target copy “qt-installs/qt480ga-nxs-qpa-rel” on target at usr/local on target file system