could not find qtplatfom plugin eglfs

[Asha]

@jsulm It means first i need to find which backend is running on my device ,based on that I need to cross compile the qt?

[jsulm]

@Asha said in could not find qtplatfom plugin eglfs:

i need to find which backend is running on my device

yes

[Asha]

@jsulm after finding ,again i need to build ,cross compiled qt?

[jsulm]

@Asha If you did not cross compile needed platform plug-in then yes

[Asha]

@jsulm Hi,

I flashed my board with debian image...any idea which plugin is running on that image...

I got the answer ,we are using linux backend...

[Asha]

for eglfs plugin ,which packages are required and how to install those?

[jsulm]

@Asha Please take a look at https://doc.qt.io/qt-5/embedded-linux.html
"we are using linux backend" - which one?

[Asha]

@jsulm I asked,which backend is running on board?

got the ans:linux

shall I ask more about backend or any link?

[jsulm]

@Asha We know from the beginning that the OS is Linux. Linux is an operating system supporting different technologies for graphics, like: X11, directfb, eglfs, ...
These technologies is what is called "backends" in Qt.

[Asha]

@jsulm Hi ,Thank you for you guide...

I found which plugin is running on my board,
That is eglfs only,

with this link https://doc.qt.io/qt-5/embedded-linux.html

for beagleboneboard my build directory is Qt5,

I got the information in the folder below

cd /home/beagle/Qt5/mkspecs/devices/linux-beagleboard-g++/qmake.conf

in qmake.conf file

QT_QPA_DEFAULT_PLATFORM = eglfs

so now,how to proceed next?

can i change the QT_QPA_DEFAULT_PLATFORM in that file ?

or need to configure with eglfs only?

[jsulm]

@Asha What did configure say about eglfs? Was it activated?

[Asha]

@jsulm I gone through this link,https://doc.qt.io/qt-5.12/embedded-linux.html

please go through the selected paragraph in the below screenshot,
in the mentioned the path i got it(dont no its currect or not just guessed)

[Asha]

how to proceed next?

[jsulm]

@Asha said in could not find qtplatfom plugin eglfs:

in the mentioned the path i got it(dont no its currect or not just guessed)

Sorry, I don't get it. What was the output of configure? Did it say eglfs was activated?

[Asha]

@jsulm

I have extracted qt source code,that can be mmoved in QT5 directory,

in QT5/qtbase/mkspecs/devices/linux-beagleboard-g++/qmake.conf file,

the line presene QT_QPA_DEFAULT_PLATFORM= eglfs...

so now i need to configure,

I need to mentioned eglfs in my configure line,so

./configure -platform linux-g++ -release -device linux-beagleboard-g++ -sysroot /home/beagle/BB/sysroot -prefix /home/debian/Qt5ForBBB -hostprefix ~/Qt5ForBBB -device-option CROSS_COMPILE="path" -egl -eglfs -nomake tests -nomake examples -skip qtconnectivitty -recheck-all -v

this is correct?

[Asha]

@jsulm eglfs is not activated,how do i activate it?

[jsulm]

@Asha said in could not find qtplatfom plugin eglfs:

how do i activate it?

Check the configure log to see what was missing (I'm quite sure that I already suggested that before).

[Asha]

@jsulm Hi,

about eglfs i got this type error,

looking for library opengl_es2
Trying source 0 (type pkgConfig) of library opengl_es2 ...

• PKG_CONFIG_SYSROOT_DIR=/home/beagle/BB/sysroot PKG_CONFIG_LIBDIR=/home/beagle/BB/sysroot/usr/lib/pkgconfig:/home/beagle/BB/sysroot/usr/share/pkgconfig:/home/beagle/BB/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --exists --silence-errors glesv2
  pkg-config did not find package.
  => source produced no result.
  Trying source 1 (type makeSpec) of library opengl_es2 ...
  None of [libGLESv2.so libGLESv2.a] found in [] and global paths.
  None of [libEGL.so libEGL.a] found in [] and global paths.
  None of [libIMGegl.so libIMGegl.a] found in [] and global paths.
  None of [libsrv_um.so libsrv_um.a] found in [] and global paths.
  => source produced no result.
  test config.qtbase_gui.libraries.opengl_es2 FAILED

Any ideas ,how do I slove this?

[SGaist]

Hi,

Do you have any of these libraries available on your sysroot ?
If not then install the corresponding development package for your target.

[Asha]

@SGaist thank you for the replay,

but i am not getting the path ,where i have to search those libraries...if you have idea then please let me know the path of those libraries...

/home/beagle/BBB1/sysroot/lib/arm-linux-gnueabihf(is it correct)...