Install Qt5 with EGL for an Embedded System, not GLX.

[EricZ89]

Hi,
I am building Qt5 with an OpenEmbedded (https://github.com/meta-qt5/meta-qt5) build environment for a TI am335x armv7 board using a gcc linaro v4.9 toolchain.

I am able to build, compile, and install every Qt5 package I need... from qtbase and qtdeclarative to qtwebkit. However, here recently, when I try to run any QtQML app, I receive the following error message on my target hardware:

• gbm_create_device: invalid fd: -1
  libEGL warning: GLX: failed to load GLX
  Could not initialize egl display

I do not need GLX because I do not need a initialize OpenGL to an X Window System. I want to use EGL to initialize OpenGL, OpenGL ES1, and OpenGL ES2 to a Window System.
How do I verify that my Qt packages are configuring, compiling, and installing with EGL and not GLX?

Here is my configuration statement. As you can see, I have set to configure with items like opengl, eglfs, no-x, etc...

• -opensource -confirm-license
  -sysroot ${STAGING_DIR_TARGET}
  -no-gcc-sysroot
  -prefix ${OE_QMAKE_PATH_PREFIX}
  -bindir ${OE_QMAKE_PATH_BINS}
  -libdir ${OE_QMAKE_PATH_LIBS}
  -datadir ${OE_QMAKE_PATH_DATA}
  -sysconfdir ${OE_QMAKE_PATH_SETTINGS}
  -docdir ${OE_QMAKE_PATH_DOCS}
  -headerdir ${OE_QMAKE_PATH_HEADERS}
  -archdatadir ${OE_QMAKE_PATH_ARCHDATA}
  -libexecdir ${OE_QMAKE_PATH_LIBEXECS}
  -plugindir ${OE_QMAKE_PATH_PLUGINS}
  -importdir ${OE_QMAKE_PATH_IMPORTS}
  -qmldir ${OE_QMAKE_PATH_QML}
  -translationdir ${OE_QMAKE_PATH_TRANSLATIONS}
  -testsdir ${OE_QMAKE_PATH_TESTS}
  -examplesdir ${OE_QMAKE_PATH_EXAMPLES}
  -hostbindir ${OE_QMAKE_PATH_HOST_BINS}
  -hostdatadir ${OE_QMAKE_PATH_HOST_DATA}
  -external-hostbindir ${OE_QMAKE_PATH_EXTERNAL_HOST_BINS}
  -platform ${OE_QMAKESPEC}
  -xplatform linux-oe-g++
  -qpa eglfs
  -no-xcursor
  -no-xinerama
  -no-xinput
  -no-xinput2
  -no-xfixes
  -no-xrandr
  -no-xrender
  -no-xshape
  -no-xsync
  -no-xvideo
  -eglfs
  -no-kms
  -opengl es2
  -shared \
  -silent
  -no-pch
  -no-rpath
  -pkg-config
  -no-xcb
  -no-sql-db2
  -no-mtdev \
  -no-gtkstyle
  -nomake tests
  -system-libjpeg
  -openssl-linked \
  -nomake examples
  -no-xfixes
  -no-sql-mysql
  -make tools
  -qt-pcre
  -no-iconv
  -no-xkb
  -no-xkbcommon
  -fontconfig
  -no-kms
  -sql-sqlite
  -system-libpng
  -tslib
  -icu
  -no-directfb
  -no-glib
  -freetype
  -no-sql-oci
  -no-xinerama
  -evdev
  -no-sql-sqlite2
  -accessibility
  -widgets
  -no-xrandr
  -no-linuxfb
  -libudev
  -no-xcursor
  -no-sql-psql
  -make libs
  -no-nis
  -no-openvg
  -no-xvideo
  -no-xsync
  -no-sql-tds
  -no-xshape
  -no-dbus
  -system-zlib
  -no-pulseaudio
  -no-xrender
  -no-mitshm
  -no-sm
  -no-xinput
  -no-sql-ibase
  -no-xinput2
  -no-alsa
  -no-sql-odbc
  -release

Is there another Qt package for Qt command where I need to set to make sure the window systems & OpenGL for Qt are using EGL and -no-glx?

Because I am using a TI hardware, I am using omap3 pkg to provide the egl, gles1, gles2 libs; the mesa pkg for gl libraries; and the PowerVR SGX series for gpu drivers.

Maybe a more general question will at least point me in the right direction... What is the different between libEGL and EGL? I understood that EGL and GLX are the initialisms for window systems, but the error message says libEGL is trying to use GLX which makes me think there is a different between libEGL and EGL.

Any help, suggestions, or general comments will be appreciated.
Thanks.