Can't crosscompile Odroid XU3 with Qt 5.5 [SOLVED]

BlackMamba

Hello,
I am following https://wiki.qt.io/ODROID-XU3 and I am trying to build qt with crosscompiling on my Odroid XU3 lite board.
The issue is that at the

make -j10

it doesn't find the headers which are located at sysroot/usr/include on the odroid.
For example I have this kind of errors :

/home/Odroid/Code/qt5.5/qtbase/src/corelib/tools/qbytearray.cpp:48:19 : fatal error : zconf.h No such file or directory

A dirty way would be to copy the headers and the .so form the Odroid System in the qt repository but I don't think it's the good approach.

Do you guys have any idea why it doesn't find the headers located at sysroot/usr/include on the odroid?

jgnoss

Some problem on cross compile may be, that the gcc on your host has different configuration than on your odroid.
means different search path

type
g++ -E -x c++ - -v < /dev/null

on both machines, your host and on your odroid
then compare the lines starting from

#include "..." search starts here:
#include <...> search starts here:

you'll notice they are diferent
and there is the problem

what you can do is

cd to [qtsrc]/qtbase/mkspecs/devices/
to let the original untouched
make a copy of
linux-odroid-xu3-g++/
example:
cp -R linux-odroid-xu3-g++ my_linux-odroid-xu3-g++
cd into my_linux-odroid-xu3-g++
and with your favorit editor and open qmake.conf
add the lines you got from "g++ -E -x c++ - -v < /dev/null" on your odroid as include and libs

example:
if you got a line like
/usr/include/arm-linux-gnueabihf/c++/4.8

add it to your my_linux-odroid-xu3-g++/qmake.conf like

QMAKE_INCDIR += $$[QT_SYSROOT]/usr/include/arm-linux-gnueabihf/c++/4.8

if you got a line like

/usr/lib/gcc/arm-linux-gnueabihf/4.8/include-fixed

add it to your my_linux-odroid-xu3-g++/qmake.conf like

QMAKE_LIBDIR += $$[QT_SYSROOT]/usr/lib/gcc/arm-linux-gnueabihf/4.8/include-fixed

whatch the difference in lib or include in the path

then run the configure and change parameter -device to your new device file like
-device my_linux-odroid-xu3-g++

Ju

jgnoss

I forgot:

the command
g++ -E -x c++ - -v < /dev/null

has to reflect your cross compiler on the host system

in my case
on the odroid is
g++ -E -x c++ - -v < /dev/null

on the host is

/usr/bin/arm-linux-gnueabihf-g++

BlackMamba

Thank you so much jgnoss :)

I did exactly what you saidI just changed two things :

-device linux-myodroid-xu3 because I have the feeling it expects linux-[something]. I had device not found error otherwise.
I replaced $[QT_SYSROOT] with the absolute path : /home/odroid/Code/Odroid/sysroot . Otherwise I had the same error as before it wan't finding the .h files.

It is still compiling for now. So far no error. Maybe I will have other errors but for sure the build already went further this particular error.

I had been stuck on that for 2 weeks, many many thanks !

jgnoss

ohh sorry, yes that's right
it should be
linux-someplatform_something

I just wrote that out of my head not thinking in the device name convention

and the $[QT_SYSROOT] prefix has to have two $ signs
$$[QT_SYSROOT]

works for me

jgnoss

ahh here it comes, i should learn about the right syntax of the forum editor

another time he eat the second $ sign in front of the variable name

BlackMamba

haha oki :)
Thanks !

BlackMamba

After hours of compilation, I have these errors :
I didn't find much on these on the web :(

/home/odroid/Code/Odroid/sysroot/usr/include/c++/4.9/bits/stl_vector.h:803: error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/home/odroid/Code/Odroid/sysroot/usr/include/c++/4.9/bits/stl_vector.h:803: error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/home/odroid/Code/Odroid/sysroot/usr/include/c++/4.9/bits/stl_bvector.h:788: error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'
/home/odroid/Code/Odroid/sysroot/usr/include/c++/4.9/bits/stl_bvector.h:788: error: undefined reference to 'std::__throw_out_of_range_fmt(char const*, ...)'

Any idea?

BlackMamba

I am trying with gcc/g++ 4.8 instead of 4.9, we will see if it changes something.

BlackMamba

Doens't work, I am done with that :(