How to build Qt on system without a GUI?

Pavel_47 · wrote on 24 Oct 2019, 14:43

You mean that the errors announce in the screenshot from previous message are still related to the xkbcommon issue ?
So I should ask xkbcommon developpers for makefile dedicated for RPi3. Correct ?
Let's say I got it, what next ? Where should I put xkbcommon built directory ... i.e. which location in ~/raspi/sysroot.
After all ... I wonder if someone already faced this issue ? Or this probles rose for the 1st time ? What about previous Qt releases ? There were no similar issues ?

SGaist · wrote on 24 Oct 2019, 15:09

It's a library that is now provided on all Linux flavours supported by the Qt project. Prior to that, it was bundled with Qt.

So what distribution are you running on your Pi ?

Pavel_47 · wrote on 24 Oct 2019, 15:42

Linux raspberrypi 4.9.77-v7+

SGaist · wrote on 24 Oct 2019, 15:47

That's the kernel running on your target.

Are you using Raspbian ? Another distribution ?

Pavel_47 · wrote on 24 Oct 2019, 15:53

Yes, I use raspbian "Jessie"

SGaist · wrote on 24 Oct 2019, 17:08

Then, AFAIR, you should have the library. So if it can't be found either:

it wasn't synchronized properly back to your host machine
the configure call has not been done from a clean state
it's not the correct library that was found

For the first point you have to sync the library as well as the symbolic links pointing to it or re-create them in your host copy of the sysroot.

Pavel_47 · 24 Oct 2019, 18:40

I did as you suggested:
(1) resync host wit RPi:
rsync -avz pi@raspberrypi.local:/lib sysroot
rsync -avz pi@raspberrypi.local:/usr/include sysroot/usr
rsync -avz pi@raspberrypi.local:/usr/lib sysroot/usr
rsync -avz pi@raspberrypi.local:/opt/vc sysroot/opt
(2) update symbolic names:
./sysroot-relativelinks.py sysroot
Then rebuild Qt (rather tried to rebuild).
Here is what I got:

This time it's different ... but still fails

Pablo J. Rogina · wrote on 24 Oct 2019, 18:40

@Pavel_47 two things please:

Your last screenshot doesn't seem to show exact error, I guess you should scroll up
stop posting screenshots, paste text instead (it's easier for others to comment back on any line of output for instance...)

Pavel_47 · wrote on 24 Oct 2019, 21:11

The log is huge.
I scrolled up a few hundred lines - nothing that indicatedŝ errors.
Concerning text instead of screenshots - Ok, I took note.

SGaist · wrote on 24 Oct 2019, 21:25

Run the build with only one process you'll have the error closer.

Pavel_47 · 25 Oct 2019, 10:18

Yes, with one core the the log is more verbose.
Here is what I got at the end:

rm -f libcomposeplatforminputcontextplugin.so
/home/pavel/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/home/pavel/raspi/sysroot -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,\$ORIGIN/../../lib -Wl,-rpath-link,/home/pavel/raspi/sysroot/opt/vc/lib -Wl,-rpath-link,/home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/home/pavel/raspi/sysroot/lib/arm-linux-gnueabihf -shared -o libcomposeplatforminputcontextplugin.so .obj/qcomposeplatforminputcontextmain.o .obj/qcomposeplatforminputcontext.o .obj/moc_qcomposeplatforminputcontext.o  -L=/opt/vc/lib /home/pavel/raspi/qtbase/lib/libQt5Gui.so /home/pavel/raspi/qtbase/lib/libQt5Core.so /home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libGLESv2.so -lpthread /home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so   
.obj/qcomposeplatforminputcontext.o: In function `QComposeInputContext::~QComposeInputContext()':
qcomposeplatforminputcontext.cpp:(.text+0x34): undefined reference to `xkb_compose_state_unref'
qcomposeplatforminputcontext.cpp:(.text+0x3c): undefined reference to `xkb_compose_table_unref'
.obj/qcomposeplatforminputcontext.o: In function `QComposeInputContext::reset()':
qcomposeplatforminputcontext.cpp:(.text+0x80): undefined reference to `xkb_compose_state_reset'
.obj/qcomposeplatforminputcontext.o: In function `QComposeInputContext::ensureInitialized()':
qcomposeplatforminputcontext.cpp:(.text+0x3bc): undefined reference to `xkb_compose_table_new_from_locale'
qcomposeplatforminputcontext.cpp:(.text+0x3d0): undefined reference to `xkb_compose_state_new'
.obj/qcomposeplatforminputcontext.o: In function `QComposeInputContext::filterEvent(QEvent const*)':
qcomposeplatforminputcontext.cpp:(.text+0x6ac): undefined reference to `xkb_compose_state_feed'
qcomposeplatforminputcontext.cpp:(.text+0x6b4): undefined reference to `xkb_compose_state_get_status'
qcomposeplatforminputcontext.cpp:(.text+0x6f8): undefined reference to `xkb_compose_state_get_utf8'
qcomposeplatforminputcontext.cpp:(.text+0x72c): undefined reference to `xkb_compose_state_get_utf8'
collect2: error: ld returned 1 exit status
Makefile:247: recipe for target '../../../../plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so' failed
make[4]: *** [../../../../plugins/platforminputcontexts/libcomposeplatforminputcontextplugin.so] Error 1
make[4]: Leaving directory '/home/pavel/raspi/qtbase/src/plugins/platforminputcontexts/compose'
Makefile:47: recipe for target 'sub-compose-make_first' failed
make[3]: *** [sub-compose-make_first] Error 2
make[3]: Leaving directory '/home/pavel/raspi/qtbase/src/plugins/platforminputcontexts'
Makefile:129: recipe for target 'sub-platforminputcontexts-make_first' failed
make[2]: *** [sub-platforminputcontexts-make_first] Error 2
make[2]: Leaving directory '/home/pavel/raspi/qtbase/src/plugins'
Makefile:778: recipe for target 'sub-plugins-make_first' failed
make[1]: *** [sub-plugins-make_first] Error 2
make[1]: Leaving directory '/home/pavel/raspi/qtbase/src'
Makefile:50: recipe for target 'sub-src-make_first' failed
make: *** [sub-src-make_first] Error 2

Seem that problem is still related to xkb staff ...

jsulm · wrote on 25 Oct 2019, 10:18

@Pavel_47 said in How to build Qt on system without a GUI?:

undefined reference to `xkb_compose_state_get_utf8'

You're not linking against xkb lib

Pavel_47 · 25 Oct 2019, 11:10

So, problems in Makefile ?

jsulm · wrote on 25 Oct 2019, 11:10

@Pavel_47 Try

file /home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so

and post the output here.

Pavel_47 · 25 Oct 2019, 12:04

here it is:

pavel@ALABAMA:~/raspi/qtbase$ file ~/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so
/home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so: symbolic link to libxkbcommon.so.0.0.0

jsulm · wrote on 25 Oct 2019, 12:04

@Pavel_47 Then please do

file /home/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so.0.0.0

Pavel_47 · 25 Oct 2019, 13:56

pavel@ALABAMA:~/raspi/qtbase$ file ~/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so.0.0.0
/home/pavel/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so.0.0.0: cannot open `/home/pavel/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so.0.0.0' (No such file or directory)

Pablo J. Rogina · 25 Oct 2019, 13:48

@Pavel_47 said in How to build Qt on system without a GUI?:

I've just checked libxkbcommon-dev and libxkbcommon-x11-dev on RPi.

So sync them to your sysroot in the host PC!

As on Ubuntu they are installed and are newest versions.

Forget about that, it doesn't matter.

For cross-compilation you need your libraries + headers installed properly in target device (RPi), then copy (synchronize) some folders from your target device into the sysroot folder in your host PC (with Ubuntu) and only then attempt to build (Qt framework, modules, your application).

Please take a look at this guide for cross-compiling Qt for RPi

Pavel_47 · wrote on 25 Oct 2019, 13:48

@Pablo-J-Rogina said in How to build Qt on system without a GUI?:

Please take a look at this guide for cross-compiling Qt for RPi

I proceeded exactly as described on the page you mentioned.
Sure I performed the resync with RPi

Pablo J. Rogina · wrote on 25 Oct 2019, 13:56

@Pavel_47 said in How to build Qt on system without a GUI?:

Sure I performed the resync with RPi

I'm not going to argue in contrary, so your next task is to figure out why even having rsync'd the file is missing from your sysroot folder...

/home/pavel/pavel/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libxkbcommon.so.0.0.0: cannot open