Cross compile from Ubuntu Desktop to Raspberry Pi 2
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Hey there!
I'm using:
PC: Ubuntu Desktop 16.04 (64-bit) with Qt Creator 5.8
Raspberry Pi 2: Raspbian Jessie Lite
My main goal - develop simple Qt application on my desktop PC and compile it for Raspberry Pi 2 which has 7" LCD connected.I used this tutorial https://wiki.qt.io/RaspberryPi2EGLFS but instead of 5.6 I used 5.8 branch, so basically step 7 was "git clone git://code.qt.io/qt/qtbase.git -b 5.8" and in the end no errors appeared.
I then used this tutorial https://www.ics.com/blog/configuring-qt-creator-raspberry-pi starting from step 6 to create some test application. This application is compiling without any errors on my Ubuntu Desktop, but when I choose to build it for Raspberry Pi, I get this error on make action:
/home/janisk/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libicui18n.so.52: undefined reference to `__cxa_throw_bad_array_new_length@CXXABI_1.3.8'I found this topic https://forum.qt.io/topic/64086/libqt5core-so-undefined-reference-to-__cxa_throw_bad_array_new_length-cxxabi_1-3-8/6 with similar error, but I already have that -spec devices suggested in Build settings for Raspberry Pi: qmake /home/janisk/Qt/testing/widgettest/widgettest.pro -spec devices/linux-rasp-pi2-g++ && /usr/bin/make qmake_all
First question: do I need to point to 64-bit compiler and debugger on my Build&Run Raspberry Pi Kit? Or should it be 32-bit since Raspberry Pi is 32-bit?
Second question: what does that error mean in the first place? -
@JanisK It doesn't matter whether the compiler itself is 32bit or 64bit, it just needs to generate 32bit ARM binaries.
Regarding the error: looks like some library is missing.
Try:ldd /home/janisk/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libicui18n.so.52 -
@jsulm - thanks for the reply.
I tried to run ldd /home/janisk/raspi/sysroot/usr/lib/arm-linux-gnueabihf/libicui18n.so.52 and got this:
not a dynamic executableBut I tried with version 5.7 instead of 5.8 (git clone git://code.qt.io/qt/qtbase.git -b 5.7) and then the rest commands from tutorial, and everything works in 5.7 with no problems.
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I have the same problem too.
Qt Creator compile any example:
libicui18n.so.52: undefined reference to `__cxa_throw_bad_array_new_length@CXXABI_1.3.8'Raspberry Pi2,2017-01-11-raspbian-jessie.zip,Qt 5.8.0
I don know how to solve it.
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@peterlin82 Check the dependencies for libicui18n.so.52 using ldd, looks like a library is missing.
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In Raspberry Pi 2
ldd /usr/lib/arm-linux-gnueabihf/libicui18n.so.52linux-vdso.so.1 (0x7ee13000)
/usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76dc6000)
libicuuc.so.52 => /usr/lib/arm-linux-gnueabihf/libicuuc.so.52 (0x76c66000)
libicudata.so.52 => /usr/lib/arm-linux-gnueabihf/libicudata.so.52 (0x755e9000)
libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x755d6000)
libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x754fa000)
libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x7547f000)
libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x75451000)
libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x75310000)
/lib/ld-linux-armhf.so.3 (0x54b69000) -
Hey!
I have the same error when i try to compile qt 5.8 for raspberry pi 3.
i get the same results as @peterlin82 and @JanisK when trying the ldd /usr/lib/arm-linux-gnueabihf/libicui18n.so.52 on RPI 3 and on Ubuntu.
I'm not sure what to tell of it, don't get any obvious errors what i can see.
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@Fifkie @JanisK Not sure it will help: https://github.com/raspberrypi/tools/issues/41
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I also got the same error when cross compile Qt samples for Raspberry Pi 3 on Ubuntu 16.04 (64-bit). I'm using Qt Creator 5.8.
I got this error on both Raspbian 1.1 and Ubuntu Mate 16.04.2.
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I managed to cross compile Qt 5.8 for the Raspberry Pi 3 (latest Raspbian) with the xbomber tip from this post (at the end): https://github.com/raspberrypi/tools/issues/50
Was following the EGLFS guide ( https://wiki.qt.io/RaspberryPi2EGLFS ) on a Linux Mint 17.3 x64 virtual machine.
I used the linux-rasp-pi2-g++ device configuration and the arm-rpi-4.9.3-linux-gnueabihf toolchain.
Used the Qt 5.8 source tar.gz without the qtserialbus and qtwebengine -
@hubaiz Looking promising!
I just wonder, the second script, is there anything else i need to change than the path to tools and sysroot when targeting qt5.8 and raspberry 3?i changed the paths and ran the script in qtbase but got errors.
Running configuration tests... Checking for valid makespec... + cd /home/christian/raspi/qtbase/config.tests/common/verifyspec && /home/christian/raspi/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared console" "QMAKE_CFLAGS += --sysroot=/home/christian/raspi/sysroot" "QMAKE_CXXFLAGS += --sysroot=/home/christian/raspi/sysroot" "QMAKE_LFLAGS += --sysroot=/home/christian/raspi/sysroot" -early "CONFIG += cross_compile" /home/christian/raspi/qtbase/config.tests/common/verifyspec + cd /home/christian/raspi/qtbase/config.tests/common/verifyspec && MAKEFLAGS= /usr/bin/make clean && MAKEFLAGS= /usr/bin/make > rm -f verifyspec.o > rm -f *~ core *.core > /home/christian/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf-g++ -c -pipe -marm -mfpu=vfp -mtune=arm1176jzf-s -march=armv6zk -mabi=aapcs-linux -mfloat-abi=hard --sysroot=/home/christian/raspi/sysroot --sysroot=/home/christian/raspi/sysroot -O2 -std=gnu++11 -Wall -W -fPIC -I. -I/home/christian/raspi/qtbase/mkspecs/devices/linux-rasp-pi-g++ -o verifyspec.o verifyspec.cpp > cp: cannot stat 'home/christian/raspi/sysroot/usr/lib/arm-linux-gnueabihf/crt*': No such file or directory > /home/christian/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf-g++ -Wl,-rpath-link,/home/christian/raspi/sysroot/opt/vc/lib -Wl,-rpath-link,/home/christian/raspi/sysroot/usr/lib/ -Wl,-rpath-link,/home/christian/raspi/sysroot/lib/ -mfloat-abi=hard --sysroot=/home/christian/raspi/sysroot --sysroot=/home/christian/raspi/sysroot -Wl,-O1 -o verifyspec verifyspec.o > cp: cannot stat 'home/christian/raspi/sysroot/usr/lib/arm-linux-gnueabihf/crt*': No such file or directory > /home/christian/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.9.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crt1.o: No such file or directory > /home/christian/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.9.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find crti.o: No such file or directory > /home/christian/raspi/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.9.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lm > collect2: error: ld returned 1 exit status > Makefile:65: recipe for target 'verifyspec' failed > make: *** [verifyspec] Error 1 Note: Also available for Linux: linux-clang linux-kcc linux-icc linux-cxx ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.Got any idea whats wrong?
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I ran into this a few weeks ago when upgrading from Qt 5.7 to 5.8 and following the wiki's instructions. I added
-skip qtwebengine -no-icuwhen I ran./configurebecause I don't need those features in my app and it worked fine after that. -
@StoatPatronus Did you put it in the script? I get an error when i try to run it:
ERROR: Unknown command line option '-skip'.Have tried to put in the beginning and in the end of the script, but i guess as long it doesn't know what it is that does not matter.
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@jsulm Sure!
It's this script:
#!/bin/sh ./configure -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/home/marco/Qt/5.3/tools-master/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /home/marco/Qt/5.3/sysroot -opensource -confirm-license -optimized-qmake -reduce-exports -release -make libs -prefix /usr/local/qt5pi -hostprefix /usr/local/qt5pi -vWith the "-skip qtwebengine -no-icu" added. I've tried right in the beginning after ./configure, in the end and after "-opensource". Neither worked.
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I was having the same issue and reconfigured with just the -no-icu flag and everything worked fine (I use qtwebengine in my app) my config string is as follows...
./configure -release -opengl es2 -device linux-rasp-pi2-g++ -device-option CROSS_COMPILE=~/raspi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot ~/raspi/sysroot -opensource -confirm-license -prefix /usr/local/qt5pi -extprefix ~/raspi/qt5pi -no-icu -hostprefix ~/raspi/qt5 -v
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@Fifkie Here's my command line, please replace the {{ stuff in brackets }} with the paths for your system:
./configure -release -opengl es2 -device linux-rasp-pi2-g++ -device-option CROSS_COMPILE={{pi_folder}}/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot {{pi_folder}}/sysroot -opensource -confirm-license -skip qtwebengine -no-icu -make libs -prefix /usr/local/qt5pi -extprefix {{pi_folder}}/qt5pi -hostprefix {{pi_folder}}/qt5One thing I noticed in the config string you posted is it looks like Qt 5.3 (
/home/marco/Qt/5.3/...etc) which I haven't tried - I only tried with 5.8. -
@StoatPatronus Now as i review the script i posted, i must have just copied that from the tut, not from the script i use because there are several things not matching. But I got Kukkimonsuta's tutorial working for me so i got it working now. For anyone else looking for a solution just follow the steps at https://github.com/Kukkimonsuta/rpi-buildqt . Only thing i had to change was with one of the scripts i got an error that it didn't have the permission to sync one folder from the RPI. So in the sync script i just added
--exclude 'vnc'in the rsync under "== Copy /usr/lib =="
That's because it wouldn't sync the vnc-folder.
