could not find qtplatfom plugin eglfs

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)...

Asha

@SGaist in the path /home/beagle/usr/lib/arm-linux-gnueabihf i found those libraries

Asha

@Asha sorry in /home/debian/usr/lib/arm-linux-gnueabihf I found those libraries....

Asha

After configuring ,I am getting the errors

ERROR: Feature 'opengles2' was enabled, but the pre-condition '(config.win32 && !features.opengl-dynamic) || (!config.watchos && !features.opengl-desktop && libs.opengl_es2)' failed.

ERROR: Feature 'egl' was enabled, but the pre-condition '(features.opengl || features.openvg) && (features.angle || libs.egl)' failed.

ERROR: Feature 'eglfs' was enabled, but the pre-condition '!config.android && !config.darwin && !config.win32 && !config.wasm && features.egl' failed.

ERROR: The OpenGL functionality tests failed!
You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL[_ES2],
QMAKE_LIBDIR_OPENGL[_ES2] and QMAKE_LIBS_OPENGL[_ES2] in the mkspec for your platform.

while checking the config.log file,i understood in my sysroot ,I dont have the libegl packages,how to install those packages? please guide me....

in my qmake.conf file
QMAKE_INCDIR_EGL=
QMAKE_LIBDIR_EGL=

this both are empty...what i need to specify there...below is the attachement of my qmake.conf file please go throught that one.....

code_text#
# qmake configuration for the BeagleBoard and BeagleBoard xM boards
# http://beagleboard.org/

MAKEFILE_GENERATOR      = UNIX
CONFIG                 += incremental
QMAKE_INCREMENTAL_STYLE = sublib

include(../../common/linux.conf)
include(../../common/gcc-base-unix.conf)
include(../../common/g++-unix.conf)

load(device_config)

QT_QPA_DEFAULT_PLATFORM = eglfs

# modifications to g++.conf
QMAKE_CC                = $${CROSS_COMPILE}gcc
QMAKE_CXX               = $${CROSS_COMPILE}g++
QMAKE_LINK              = $${QMAKE_CXX}
QMAKE_LINK_SHLIB        = $${QMAKE_CXX}

# modifications to linux.conf
QMAKE_AR                = $${CROSS_COMPILE}ar cqs
QMAKE_OBJCOPY           = $${CROSS_COMPILE}objcopy
QMAKE_NM                = $${CROSS_COMPILE}nm -P
QMAKE_STRIP             = $${CROSS_COMPILE}strip

COMPILER_FLAGS          = -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb

#modifications to gcc-base.conf
QMAKE_CFLAGS           += $${COMPILER_FLAGS}
QMAKE_CXXFLAGS         += $${COMPILER_FLAGS}
QMAKE_CXXFLAGS_RELEASE += -O3

QMAKE_LIBS             += -lrt -lpthread -ldl

# Extra stuff (OpenGL, DirectFB, ...)
QMAKE_INCDIR_EGL        =
QMAKE_LIBDIR_EGL        =
QMAKE_INCDIR_OPENGL_ES2 = $${QMAKE_INCDIR_EGL}
QMAKE_LIBDIR_OPENGL_ES2 = $${QMAKE_LIBDIR_EGL}
QMAKE_INCDIR_OPENVG     = $${QMAKE_INCDIR_EGL}
QMAKE_LIBDIR_OPENVG     = $${QMAKE_LIBDIR_EGL}

QMAKE_LIBS_EGL          = -lEGL -lIMGegl -lsrv_um
QMAKE_LIBS_OPENGL_ES2   = -lGLESv2 $${QMAKE_LIBS_EGL}
QMAKE_LIBS_OPENVG       = -lOpenVG $${QMAKE_LIBS_EGL}

DISTRO_OPTS += hard-float

# No need for any special EGL device integration.
# Prioritize the default, compiled-in integration over any plugins.
EGLFS_DEVICE_INTEGRATION = eglfs

include(../common/linux_arm_device_post.conf)

load(qt_config)

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

I dont have the libegl packages,how to install those packages?

As any other packages...
On my Ubuntu machine it is:

apt install libegl1-mesa-dev

Please learn to search for needed packages by yourself:

apt search libegl

Asha

@jsulm Hi,

when i tried to install this packages,I got already installed please throught the below screenshots....

sysroot also have those libraries ,here is the attachement

so now what is problem? why it is not enabling....(may be the problem in specifying the path for those libraries in qmake.conf file?)...

if got any idea ,then please let me know....

Asha

Any suggestions? please.....