Hi
I recently bought a Beaglebone Black, with the LCD4 cape as I want to start
learning about ARM development and embedded linux.
The board has worked for be flawlessly and I easily now have the board with
Qt4-embedded running on the built in Angstrom distro. The videos by Derek
Molloy were very helpfull, though they seem a bit out of date now.
Anyway over the last several weeks of weekends and some weekday nights,
what has been causing me pain is trying to setup an anstrom sdk and
cross-compiling toolchain, but I'm almost there, I just have a weird Qt
linking issue.
As a background, I'm doing this all on a Debian Virtual machine because the
Angstrom 2012.12 setup doesn't work in my normal Fedora 19 (relies of some
deprecated functionality that was removed in one program in F19).
To setup my tool chain I did these commands:
mkdir angstrom_beaglebone
cd angstrom_beaglebone
git clone git://github.com/Angstrom-distribution/setup-scripts.git
cd setup-scripts
MACHINE=beaglebone ./oebb.sh config beaglebone MACHINE=beaglebone ./oebb.sh
update MACHINE=beaglebone ./oebb.sh bitbake virtual/kernel
MACHINE=beaglebone ./oebb.sh bitbake systemd-image
MACHINE=beaglebone ./oebb.sh bitbake meta-toolchain
Then I found out about meta-toolchain-qte, so I then ran:
MACHINE=beaglebone ./oebb.sh bitbake meta-toolchain-qte
Then I installed the SDK:
cd
~/angstrom_beaglebone/setup-scripts/build/tmp-angstrom_v2012_12-eglibc/deploy/sdk
sudo ./angstrom-eglibc-i686-armv7a-vfp-neon-toolchain-qte-v2012.12.sh
Installed into default place, but had some permissions issues so in
/usr/local
ran:
sudo chmod -R 777 oecore.i686
finally I've added this into my .bashrc:
source
/usr/local/oecore-i686/environment-setup-armv7a-vfp-neon-angstrom-linux-gnueabi
Now for the test project, which is based on Derek's video though slightly
tweaked.
I've installed the Qt5.1.1 SDK and am using the QtCreator 2.8.1 from that,
though using the 4.8.1 that comes with the sdk.
Here's my .pro file:
#-------------------------------------------------
#
# Project created by QtCreator 2013-10-05T14:41:31
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = qttest
TEMPLATE = app
target.files = qttest
target.path = /home/root
INSTALLS += target
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
QMAKE_CXXFLAGS += -Wno-psabi
I've set the kit to use the adk's GCC and the sdk's qmake2 file.
Now, release build works great. I have it setup for deploying onto the BBB
and that works fine. The release build qmake's, compiles, links, deploys
and runs great on the BBB.
I'm having trouble with debug mode, qmake2 runs fine, and it compiles, but
I get this issue when I think it tries to link:
arm-angstrom-linux-gnueabi-g++ -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
-Wl,-rpath-link,/usr/local/oecore-i686/sysroots/armv7a-vfp-neon-angstrom-linux-gnueabi//usr/lib
-o qttest main.o mainwindow.o moc_mainwindow.o
-L/usr/local/oecore-i686/sysroots/armv7a-vfp-neon-angstrom-linux-gnueabi//usr/lib
-lQtGuiE -lQtNetworkE -lQtCoreE -lpthread
{ test -n "" && DESTDIR="" || DESTDIR=.; } && test $(gdb --version | sed -e
's,[^0-9]\+\([0-9]\)\.\([0-9]\).*,\1\2,;q') -gt 72 && gdb --nx --batch
--quiet -ex 'set confirm off' -ex "save gdb-index $DESTDIR" -ex quit
'qttest' && test -f qttest.gdb-index && objcopy --add-section
'.gdb_index=qttest.gdb-index' --set-section-flags '.gdb_index=readonly'
'qttest' 'qttest' && rm -f qttest.gdb-index || true
Traceback (most recent call last):
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/site.py",
line 569, in <module>
main()
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/site.py",
line 551, in main
known_paths = addusersitepackages(known_paths)
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/site.py",
line 278, in addusersitepackages
user_site = getusersitepackages()
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/site.py",
line 253, in getusersitepackages
user_base = getuserbase() # this will also set USER_BASE
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/site.py",
line 242, in getuserbase
from sysconfig import get_config_var
File
"/usr/local/oecore-i686/sysroots/i686-angstromsdk-linux/usr/lib/python2.7/sysconfig.py",
line 10, in <module>
'stdlib': '{base}/'+sys.lib+'/python{py_version_short}',
AttributeError: 'module' object has no attribute 'lib'
/bin/sh: line 0: test: -gt: unary operator expected
After weeks trying to get this all working and I feel I'm almost there, I'm
kinda stuck, any ideas as to what I'm doing wrong?
Thanks!
srg
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