could not find qtplatfom plugin eglfs

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.

Asha

@jsulm

Hi,

I done once again qmake and make,

After make ,I got

undefined reference to 'main'
collect2: error :ld returned 1 exit status
Makefile:137: recipe for target 'sample 'failed'
make: *** [sample] Error 1

After listing the files,the result is

Makefile
.qmake.stash
sample.cpp
sample.pro

I am not getting ,what is the problem....

jsulm

@Asha Does your sample.cpp contain main() function?

Asha

@jsulm
yes,

#include <QCoreApplication>
#include <QString>
#include <QFile>
#include <QDir>
#include <QTextStream>
#include <QDebug>
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
// prepare the message
QString message("Hello World!");
// prepare a file in the users home directory named out.txt
QFile file(QDir::home().absoluteFilePath("out.txt"));
// try to open the file in write mode
if(!file.open(QIODevice::WriteOnly)) {
qWarning() << "Can not open file with write access";
return -1;
}
// as we handle text we need to use proper text codecs
QTextStream stream(&file);
// write message to file via the text stream
stream << message;
return 0;
}
~

jsulm

@Asha Please show your pro file

Asha

@jsulm here is my .pro file

Qt += core gui

sources += \ sample.cpp

target.path=/home/debian/Qt5
INSTALLS +=target

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

\ sample.cpp

why do you have backslash in front of sample.cpp?
"Qt += core gui" must be "QT += core gui"

[edit: Fixed variable name SGaist]

Asha

@jsulm as you said i followed but getting the same result,

please say me tje .pro file for that .cpp file

SGaist

You don't even need to modify the QT variable content based on your code. However, as @jsulm wrote, your SOURCES line is wrong.

In any case it should rather be

QT += core gui
SOURCES += sample.cpp

Casing is important.