could not find qtplatfom plugin eglfs

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.....

Asha

@jsulm hi,

in this https://forum.qt.io/topic/86678/error-feature-opengles2-was-enabled-but-the-pre-condition-config-win32-config-watchos-features-opengl-desktop-libs-opengl_es2-failed/6 ,as you suggested,

I have the same config.log file for my device.can you please elaborate your this line

Well, you need these libs in your sysroot: /mnt/rasp-pi-rootfs. If your sysroot is a copy of the RaspPi root file system then install the libs there (apt-get on RaspPi).

even i also missing those libraries in my sysroot...i am not using any sd card,i flashed my device...how do i install those

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

i am not using any sd card,i flashed my device...how do i install those

Install on device? Depends on your OS. But didn't we already discussed this thoroughly? If it's a Debian based Linux then you install packages using "apt". How do you create and update your sysroot?

Asha

@Asha

it means, i need to flash my board with new debian image? after try to configure?

Asha

@jsulm I followed the below document ,please go through this one, even he also done with debian,created sysroot....

here is the link https://forum.qt.io/topic/106912/how-to-copy-cross-compiled-qt-binaries-from-one-computer-to-another/13 in the post 13...click here you will get a one pdf(I followed that one) but he did with vnc plugin(export done vnc only),even i also have that vnc plugin and i tried (exported also)but getting the same issue....

I am very new to this,(if i asked any foolish questions then sorry)

Asha

Hi,

I connected ssh,via ssh debian@192.168.7.2

after this,I am executing the executable

./example platform=vnc

The result is QVncServer created on port 5900

After this blank screen is showing...

Any suggestions about this....

Asha

Hi,
I tried ,creation and execution of application through command prompt only,

created directory

mkdir qws

cd qws

vi qws.pro
TEMPLET=app
SOURCES=main.cpp

vi main.cpp
#include<QApplication>
#include<QPushButton>
int main(int argc,char** argv)
{
QApplication app(argc,argv);
QPushButton btn("HI");
btn.show();
btn.showMaximized();
}

After this gave the command

qmake

the output is:

qmake:could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/make : No such file or directory

I am fully confused what going,what is the mistake, i cross compiled the qt5 but its showing about qt4....any ideas ?please

SGaist

Always use the full path to the qmake version you want to use.

Note that your cross-compiles Qt will have qmake built for the host and not the target.

Asha

@SGaist

Good morning..

yes Iused the full path,

what ever I build and cross compiled ,i am able to run examples in vnc platform...

but i want to build and cross compile qt with eglfs platform,for that any links?....

Asha

@SGaist Hi,

I created the drectory,and created the .cpp and .pro file after that tring for qmke but getting "qmake: could not exec '/usr/lib/x86_64-Linux-gnu/qt4/bin/make': No such file or directory.."

mkdir sample
cd sample
vi sample.cpp
vi sample.pro
qmake /home/beagle/Qt5/bin/qmake

Any suggestions please?.......

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

Any suggestions please?.......

"qmake /home/beagle/Qt5/bin/qmake" - what is this line supposed to be?!
It should be

/home/beagle/Qt5/bin/qmake

Asha

@jsulm yes,i gave this one /home/beagle/Qt5/bin/qmake

After this i got the makefile,
the gave the make

after this make getting the error

arm-linux-gnueabihf-g++: error : .o No such file or directory
Makefile:141: recipe for target 'sample' failed
make: ***[sample] Error 1

when i list the files ,i got the sample.o file

so I copied that obj file in my board using scp,

And executing that sample.o file in board,
./sample.o platform=vnc

getting the error:

-bash: ./sample.o: cannot execute binary file: EXec format error

jsulm

@Asha You can't execute *.o files!
Those needs to be linked together to an executable.

"arm-linux-gnueabihf-g++: error : .o - please delete everything in your build directory, run qmake again and then build (call make).
Also this error message looks strange - there should be actual file name in front of .o

Asha

@jsulm

Those needs to be linked together to an executable.but i am not getting the executable file...

getting this
arm-linux-gnueabihf-g++: error : .o No such file or directory
Makefile:141: recipe for target 'sample' failed
make: ***[sample] Error 1

.o - please delete everything in your build directory,

I am not understood the above line,delete everything in build directory means,I need to delete the Qt5 directory files and directories?

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

I need to delete the Qt5 directory files and directories?

No.
What I mean is: delete all build artefacts from previous builds (like *.o files, Makefiles).

Asha

@jsulm I deleted the all makefiles and .o files now tring to execute sample.o file but getting the -bash: ./sample.o:cannot execute binary file: Exec format error..

"You can't execute *.o files!",Please suggest me where i need to link that .o file(I am not getting any executable file)..

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

"You can't execute *.o files!",Please suggest me where i need to link that .o file(I am not getting any executable file)..

You just need to build again!
"I am not getting any executable file" - yes, because your build fails.
Before I wrote: please delete everything in your build directory, run qmake again and then build (call make).
So again: please run qmake and build.