Talk:RaspberryPi2EGLFS

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I got this error in make step


qeglfsbrcmintegration.cpp:35:22: fatal error: bcm_host.h: No such file or directory

#include <bcm_host.h>


compilation terminated.

make[6]: *** [.obj/qeglfsbrcmintegration.o] Error 1

make[6]: Leaving directory `/home/hamed/raspi/qtbase/src/plugins/platforms/eglfs/deviceintegration/eglfs_brcm'

make[5]: *** [sub-eglfs_brcm-make_first] Error 2

make[5]: Leaving directory `/home/hamed/raspi/qtbase/src/plugins/platforms/eglfs/deviceintegration'

make[4]: *** [sub-deviceintegration-make_first-ordered] Error 2

make[4]: Leaving directory `/home/hamed/raspi/qtbase/src/plugins/platforms/eglfs'

make[3]: *** [sub-eglfs-make_first] Error 2

make[3]: Leaving directory `/home/hamed/raspi/qtbase/src/plugins/platforms'

make[2]: *** [sub-platforms-make_first] Error 2

make[2]: Leaving directory `/home/hamed/raspi/qtbase/src/plugins'

make[1]: *** [sub-plugins-make_first] Error 2

make[1]: Leaving directory `/home/hamed/raspi/qtbase/src'

make: *** [sub-src-make_first] Error 2

hamed@hamed-PC ~/raspi/qtbase $

I edited this topic to add the solution to this error (fatal error: bcm_host.h: No such file or directory)

to solve this problem just add these lines

INCLUDEPATH += $[QT_SYSROOT]/opt/vc/include

INCLUDEPATH += $[QT_SYSROOT]/opt/vc/include/interface/vcos

INCLUDEPATH += $[QT_SYSROOT]/opt/vc/include/interface/vcos/pthreads

INCLUDEPATH += $[QT_SYSROOT]/opt/vc/include/interface/vmcs_host/linux

to these two files: "qtbase/mkspecs/devices/linux-rasp-pi-g++/qmake.conf"

and:

"qtbase/mkspecs/devices/linux-rasp-pi2-g++/qmake.conf"

after save the files repeat these two steps "configure" and "make"

the refrence is this thread



Different error in the make step http://stackoverflow.com/questions/34685488/qt-5-6-cross-compile-for-raspberry-pi-with-eglfs

QT Serial Port install in cross-compile environment

I am attempting to adapt the instructions linked here: Qt Serial Port to this cross-compile environment. The Qt Serial Port page suggests that Qt Serial Port is included in Qt5, however I cannot seem to find it. Has it been removed? I am running QT 5.4.2. on my host system.

If I have to install Qt Serial Port, then I am not sure how to successfully install it in this cross-compile environment. Can anyone help with this? Thank you!

Prerequisites to run cross compile tools on fresh Ubuntu/Debian x64

To run the tools on a host running Ubuntu / Debian x64, the following libraries are necessary:

$ sudo apt-get install lib32stdc++6 lib32z1 lib32ncurses5

Otherwise, errors like this might occur:

arm-linux-gnueabihf-g++: Command not found

or

arm-linux-gnueabihf-g++: Kommando nicht gefunden

--Woehrl.biz (talk) 08:06, 26 April 2016 (UTC)

X C Bindings

I had to add the following parameter to the configure command:

-qt-xcb

Otherwise the following error is shown:

The test for linking against libxcb and support libraries failed!
 You might need to install dependency packages, or pass -qt-xcb.
 See src/plugins/platforms/xcb/README.

--Woehrl.biz (talk) 09:42, 26 April 2016 (UTC)

Illegal instruction

I just set up a fresh Ubuntu 14.04 and RPiZero Raspbian.

I followed this tutorial and everything worked (after using the discussion page fixes) except for the example.

I built the example without errors, deployed it, set up the libraries, etc.

When I run the example on the Pi I simply get "Illegal Instruction". Nothing else.

I turned on logging and don't see the log output anywhere that I can find.

EDIT: I don't know if you just want me to delete this. I found the problem. I was building for the pi2 and trying to run it on the pi zero. Sorry about that. I am new to this stuff. I figured out how to build for pi 1 / zero and now everything works. This is awesome!!!

libinput not detected by configure script

Hi. In this excellent tutorial it is said that one must make sure that libinput is set to "yes" in configure's summary report.

I have libinput installed, and the library files and headers are in the sysroot path as required. Yet configure does not detect it. Even when I add the -libinput argument to the configure command line.

The test widget however compiles and runs fine on my Pi2.

Is libinput really required, and why?

Thanks!

could not find or load the Qt platform plugin "eglfs"

After following the tutorial, when running qopenglwidget I get the following error:

This application failed to start because it could not find or load the Qt platform plugin "eglfs" in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, xcb.

Reinstalling the application may fix this problem. Aborted

Since we are going to build Qt5 for Pi, I don't really get why one must INSTALL certain modules of Qt BEFORE the build?

Initial

Hi.

I just tried this tutorial on a Raspberry Pi 3, and encountered the following problem:

pi@raspberrypi:~ $ sudo apt-get build-dep libqt5gui5
Reading package lists... Done
Building dependency tree
Reading state information... Done
Picking 'qtbase-opensource-src' as source package instead of 'libqt5gui5'
The following packages have unmet dependencies:
libgles2-mesa-dev : Depends: libegl1-mesa-dev but it is not going to be installed
libopenvg1-mesa-dev : Depends: libegl1-mesa-dev but it is not going to be installed
E: Build-dependencies for libqt5gui5 could not be satisfied.

Any hints?

Thanks, OJ

Greetings to all from Argentina. I'm trying to install this OpenGL accelerator I have a compilation with lots of errors how can I upload the text file with the screen output? They are many pages of text.

Thank you very much.

small fix to the relativelink fixing script

The script relinks also systemd files pointing to /dev/null. Although this does not break anything currently, here is a fix Copy the following and paste to shell in the directory where the sysroot-relativelinks.py is

patch <<'EOF'
*** sysroot-relativelinks.py~	Fri Apr 28 09:50:57 2017
--- sysroot-relativelinks.py	Fri Apr 28 10:56:27 2017
***************
*** 18,23 ****
--- 18,25 ----
          return
      if link.startswith(topdir):
          return
+     if link.startswith("/dev/"):
+         return
      #print("Replacing %s with %s for %s" % (link, topdir+link, filep))
      print("Replacing %s with %s for %s" % (link, os.path.relpath(topdir+link, subdir), filep))
      os.unlink(filep)
EOF

Ansible Roles/Playbooks Based on this Article

I used the instructions here to make Ansible playbooks that perform most of the same steps. The playbooks can set up a Pi, set up a development computer, and then deploy Qt to the Pi. Repo is https://bitbucket.org/johnwoltman/build_qt_for_pi_with_ansible

Minor improvement to step 8

You can combine all 5 commands into one like this:

rsync -avzR pi@raspberrypi.local:/lib :/usr/include :/usr/lib :/opt/vc sysroot

Note that -R preserves the path names and that rsync creates the ./sysroot directory for us.