Want to set up Qt5 for developing application in Wandboard

Mayur Gaikwad

Please see the new qmake.conf file

@#

qmake configuration for the Freescale iMX6 boards (single, dual and quad)

This mkspec is based and tested on the ltib-source-release 3.0.15

Building ltib including glib, gpu-drivers and what ever you want to use (e.g. dbus or fontconfig)

This mkspec is tested with a framebuffer (eglfs) configuration (not testes with X11)

A typical configure line looks like:

/home/tsenyk/qt5/qt5/configure -opensource -confirm-license -make libs -device imx6 \

-device-option CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-fsl-linux-gnueabi- \

-sysroot <path-to-your-ltib-install>/rootfs -no-gcc-sysroot \

-prefix /usr/local/Qt-5.0.0/Qt5-imx6-1

NOTE: currently ltib doesn't produce a proper staging/sysroot-filessystem.

If gcc's --sysroot is used, the toolchain doesn't find basic binaries (e.g. crt1.o),

therefore you have to pass -no-gcc-sysroot to configure if you pass -sysroot to configure!

include(../common/linux_device_pre.conf)

EGLFS_PLATFORM_HOOKS_SOURCES = $$PWD/qeglfshooks_imx6.cpp

QMAKE_INCDIR_OPENGL_ES2 += /usr/include/GLES2/
QMAKE_LIBDIR_OPENGL_ES2 += /usr/lib/i386-linux-gnu/

QMAKE_LIBS_EGL += -lEGL
QMAKE_LIBS_OPENGL_ES2 += -lGLESv2 -lEGL -lGAL
QMAKE_LIBS_OPENVG += -lOpenVG -lEGL -lGAL

QMAKE_LFLAGS += -Wl,-rpath-link,$$[QT_SYSROOT]/usr/lib

IMX6_CFLAGS = -march=armv7-a -mfpu=neon -DLINUX=1 -DEGL_API_FB=1
IMX6_CFLAGS_RELEASE = -O2 $$IMX6_CFLAGS
QMAKE_CFLAGS_RELEASE += $$IMX6_CFLAGS_RELEASE
QMAKE_CXXFLAGS_RELEASE += $$IMX6_CFLAGS_RELEASE
QMAKE_CFLAGS_DEBUG += $$IMX6_CFLAGS
QMAKE_CXXFLAGS_DEBUG += $$IMX6_CFLAGS

include(../common/linux_arm_device_post.conf)

load(qt_config)@

p3c0

Can you make sure those libraries are for ARM ? You can use file command for that.
eg.
@
file /usr/lib/i386-linux-gnu/libGLESv2.so
@

and post the output here

Mayur Gaikwad

No these files are not for ARM, its for Intel, see the o/p

msil@msil-ThinkCentre-Edge71:~/Qt5.3.1/5.3/Src/qtbase$ file /usr/lib/i386-linux-gnu/libGLESv2.so
/usr/lib/i386-linux-gnu/libGLESv2.so: symbolic link to `mesa-egl/libGLESv2.so'

msil@msil-ThinkCentre-Edge71:~/Qt5.3.1/5.3/Src/qtbase$ file /usr/lib/i386-linux-gnu/mesa-egl/libGLESv2.so
/usr/lib/i386-linux-gnu/mesa-egl/libGLESv2.so: symbolic link to `libGLESv2.so.2.0.0'

msil@msil-ThinkCentre-Edge71:~/Qt5.3.1/5.3/Src/qtbase$ file /usr/lib/i386-linux-gnu/mesa-egl/libGLESv2.so.2.0.0
/usr/lib/i386-linux-gnu/mesa-egl/libGLESv2.so.2.0.0: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, BuildID[sha1]=9a43029fd41b7b30967de0b2c1b43bcdd5316606, stripped

How to get corresponding ARM files?

p3c0

Can you again locate libGLESv2.so and check if there's other libraries and then running file command for each of them ?
But since you have apt-get install'd the drivers it should have downloaded the ARM versions of those libraries instead of Intel.
Is wandboard arm based for sure ?

Mayur Gaikwad

When I give locate libGLESv2.so then only a single file found which is for Intel version. No other file found.

i am not getting what you asked about Wandboard, can you plz elaborate?

p3c0

I said that since you have installed opengl es libraries using apt-get i think it should have downloaded arm compatible libraries and not intel
Can you
@
apt-get install libgles1-mesa libgles1-mesa-dev
apt-get install freeglut3 freeglut3-dev
@

and then see if you get arm based libraries

Mayur Gaikwad

Still I am not getting the libGLESv2.so file other than previous.

Can you tell from scratch how to setup Qt for my wandboard application?

I think there is some wrong at my end while doing all this thing.

Mayur Gaikwad

can I explain you in brief how i am started & how i reached at this stage in my project?

this will help you to know if i was wrong at some point during this progress.

p3c0

First we need to configure Qt before compiling, so during configuration process we get this OpenGL ES error, we have installed the libraries, found the paths of it's related header files and libraries and saved it to qmake.conf using those variables.
The problem i guess here is those libraries are Intel and not ARM and we need ARM compatible libraries since board is ARM based.

One way would be try repeating the whole process again to errors if any.

Well i think best would be to ask on their "forums":http://www.wandboard.org/index.php/forums, someone definitel must have done it for ubuntu and not yocto..

Mayur Gaikwad

Ok ,
Surely I will put the same problem at Wandboard forum. Lets see what is reply from that forum.

I will get back to you once they reply.

Thanks.

p3c0

Hi,

Just backtracked, since you are cross compiling, need to set the paths of OpenGL ES libs and headers to that of your toolchain. You toolchain must have those header files and the library too.

Mayur Gaikwad

As you said, can you tell me what are the OpenGL ES libraries & headers for Linaro toolchain (gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux) which i am using.

Also plz tell me where to set the paths of those files.

p3c0

The same that we searched earlier:
header - GLES2/gl2.h i.e GLES2/*
library - libGLESv2.so

It must be in the toolchain.

Mayur Gaikwad

Hi,

I have checked the header files & library files within the toolchain but its not there.

You can check it by downloading the toolchain from below link.

"https://releases.linaro.org/14.04/components/toolchain/binaries/gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux.tar.xz":http://

p3c0

Another possibility of those OpenGL libraries would be in the Ubuntu image that you have downloaded. Can you search for those in the Ubuntu that you have flashed on the board ?

Mayur Gaikwad

Hi,

I search at my end i got header file GLES2/gl2.h at multiple when i put command "file path/GLES2/gl2.h" then at every path it gives C source file in ASCII format.
Also I got only one libGLESv2.so library which is Compatible to Intel.

Can i search libGLESv2.so file for ARM on Internet & download it & copy to my toolchain?

is it OK?

p3c0

bq. Can i search libGLESv2.so file for ARM on Internet & download it & copy to my toolchain?

Not sure if that would work.

But did you search if it is in the Ubuntu OS that you flashed on the board ?
It surely must be there.
And if it's there you will need to compile Qt in that environment so that it picks up the ARM compatible OpenGL libraries.

Mayur Gaikwad

Yes, the library libGLESv2.so is avilable at the location /usr/lib/i386-linux-gnu/mesa-egl & it is with Ubuntu OS. So how can I generate ARM compatible library with this.

Can you provide steps?

p3c0

Lets clarify few things

Where are you compiling Qt ? on the WandBoard or on your development machine ?
Where is this above library on the WandBoard or your machine ?

Mayur Gaikwad

Hi,

Right now I am compiling code in Qt which is installed on my desktop PC. i haven't port Qt on wandboard.
The above path which i mentioned is on system directory. thats means its in my PC rootfs.