can we change the compiler in qmake

[Asha]

Hi,

I am running one simple qt application,first i selected the normal desktop gcc compiler,

but I am connecting the beagleboneboard to my laptop,so through some websites i got i need cross compiler,so now i installed arm cross compiler and selecting this compiler in kit configuration but that showing the red mark,

and getting the issue,

used g++ compiler in qmake ,now using the arm cross compiler

so how to change the compiler in qmake..

and how to run that application successfully

thankyou

[jsulm]

@asha said in can we change the compiler in qmake:

showing the red mark

First: please put mouse cursor over that red mark and check what it says (what the problem is).
Second: you don't change compiler in qmake, you define the proper compiler in your Kit.
In your Kit for the target device you need Qt compiled with cross compiler and the cross compiler.
If in doubt please post screen shot of your Kit...

[Asha]

Its showing the error:

First:
the compiler arm-linux-generic-elf64bit cannot produce code for the qt version "Qt 5.13.0 GCC 64bit"(x86-linux-generic-elf-64bit)..

Second:yes giving the proper path for cross compiler,you can see here

[aha_1980]

@asha said in can we change the compiler in qmake:

the compiler arm-linux-generic-elf64bit cannot produce code for the qt version "Qt 5.13.0 GCC 64bit"(x86-linux-generic-elf-64bit).

Then you need a Qt version that fits your compiler (architecture and bitness) and you need to assign this to your compiler in the Kit.

[Asha]

any idea which version qt i have to install about this gcc cross compiler as i attached below please go through that one

If have any idea then please let me know...

OR

please give the information ,which supports any qt version and cross compiler both..

thankyou

[jsulm]

@asha said in can we change the compiler in qmake:

the compiler arm-linux-generic-elf64bit cannot produce code for the qt version "Qt 5.13.0 GCC 64bit"(x86-linux-generic-elf-64bit)..

Of course it can't. I already told you that you need a cross compiled Qt version. ARM != x86-64. That means you need download Qt source code and build it using your cross compiler and sysroot for your device.

"Second:yes giving the proper path for cross compiler,you can see here" - no, I can't because you did not show your Kit. Did you select this compiler in your Kit?

"any idea which version qt i have to install" - cross compile Qt by yourself.
Here https://wiki.qt.io/index.php?title=Raspberrypi_beginners_guide&redirect=no is an explanation how to do it for RaspberryPi, but it is similar for other devices.

[Asha]

here is the kit:

[jsulm]

@asha Yes, the Qt version you selected can't be used with an ARM compiler.
Cross compile Qt and set that one in the Kit.

[Asha]

Hi,

I downloaded the qt source code,

"qt-everywhere-opensource-src-5.7.1.tar.gz"

now trying to build this,here is the attachement ,

is it correct?(because I am feeling like that again i am building the qt for linux-g++ only)

[J.Hilk]

@asha
what was your ./configure command?

[Asha]

here is the attachement

[SGaist]

Hi,

From the looks of it, you're not telling configure that you want to cross-compile.

[Asha]

Hi,

Thanks for the replay,please see the below attachement ,and please let me what is the problem, and how to solve this

[jsulm]

@asha Did you read what @SGaist wrote?
You are NOT cross compiling!
You need to tell configure that you want to cross compile.
An example how to do this is here: https://www.raspberrypi.org/forums/viewtopic.php?t=204778

[Asha]

@jsulm yes I read,what @SGaist wrote,

So,I stopped that configure and again done the configure with my cross compiler ,the above screenshot is for cross compiler only that is "arm-linux-gnueabihf"

Please go through that oone...

[Pablo J. Rogina]

@asha said in can we change the compiler in qmake:

the above screenshot is for cross compiler only that is "arm-linux-gnueabihf"

Assuming that "beagle@beagle1" read from command prompt in that screenshot, it looks like you're working on your EMBEDDED DEVICE.

If so, then you are NOT cross-compiling, which whole purpose is by no means compiling in the target device.

You are supposed to only use the BBB device just to copy the cross-compiled Qt libraries and application (which are built in the host machine) and only run it there

[SGaist]

Did you check that you have libz in your sysroot ?

[Asha]

@sgaist ,I checked it in qt kit configuration ,And I am not finding libz in my sysroot..

[Asha]

@pablo-j-rogina Sir,
"beagle@beagle1" is my user name, where my target device name is debian@beaglebone.

I am not successed with make run only,so I am not understood this lines

"You are supposed to only use the BBB device just to copy the cross-compiled Qt libraries and application (which are built in the host machine) and only run it there"

while make running getting error some library files are missing ,Like

"error while loading shared libraries: libz.so.1: /home/beagle1/installQt/gcc-linaro-arm-linux-gnueabihf-4.8-2013.10_linux/bin/../libexec/gcc/arm-linux-gnueabihf4.8.2/cc1plus: error while loading shared libraries: libz.so.1: cannot open shared object file:
No such file or directory"....

[Asha]

One more thing ,

SELinux status is Disable in my system,

is this is issue?