Cross-compiling QT/embedded
QT/Embedded for the TS-7290
It has been a major pain to get a proper version of QT/embedded working on the TS-7290. The blog at automon was quite helpful.
Yes, you want TSLIB, otherwise the cursor does not follow where you touch the screen.
Warning: For eabi, you MUST use -mfloat-abi=soft or else you either get compiler segfaults, or "illegal instruction" errors when trying to run the code. See: [1] and [2]
Prerequisites
You first need a decent (i.e. correctly build) cross compiler. For OABI I used binutils-2.18 with gcc 4.1.2. For EABI I used binutils-2.20 and gcc-4.3.2 (same version as the Lenny eabi uses).
OABI
To make binutils, get the source, untar it, create a "build-arm-linux-gnu" subdirectory and execute:
../configure --target=arm-linux-gnu --prefix=/net/home/maurik/cross-compile/arm-linux-gnu --with-sysroot=/net/home/maurik/cross-compile/arm-linux-gnu --with-local-prefix=/net/home/maurik/cross-compile/arm-linux-gnu --disable-nls --with-gcc --with-gnu-as --with-gnu-ld make make install
To make your compiler, get the sources, untar, create "build-arm-linux-gnu" subdir and execute:
../configure --target=arm-linux-gnu --prefix=/net/home/maurik/cross-compile/arm-linux-gnu --with-sysroot=/net/home/maurik/cross-compile/arm-linux-gnu --with-local-prefix=/net/home/maurik/cross-compile/arm-linux-gnu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-shared --enable-c99 --enable-long-long --enable-languages=c,c++ make make install
NOTE: YOU MUST MAKE THESE ON AN i386 TYPE MACHINE. On the x86_64 you get a different puppy which may not work. (didn't for me....)
EABI
To make binutils, get the source, untar it, create a "build-arm-linux-gnu" subdirectory and execute:
../configure --target=arm-linux-gnueabi --prefix=/net/home/maurik/cross-compile/arm-linux-gnueabi --with-sysroot=/net/home/maurik/cross-compile/arm-linux-gnueabi --with-local-prefix=/net/home/maurik/cross-compile/arm-linux-gnueabi --with-gcc --with-gnu-as --with-gnu-ld make make install
To make your compiler, get the sources, untar, create "build-arm-linux-gnu" subdir and execute:
../configure --target=arm-linux-gnueabi --prefix=/net/home/maurik/cross-compile/arm-linux-gnueabi --with-sysroot=/net/home/maurik/cross-compile/arm-linux-gnueabi --with-local-prefix=/net/home/maurik/cross-compile/arm-linux-gnueabi --enable-shared --enable-threads=posix --enable-nls --without-included-gettext --enable-clocale=gnu --enable-symvers=gnu --enable-languages=c,c++ --enable-shared --enable-c99 --with-system-zlib --enable-mpfr --disable-libssp CCFLAGS=-m32 make make install
NOTE: YOU MUST MAKE THESE ON AN i386 TYPE MACHINE. On the x86_64 you get a different puppy which may not work. (didn't for me). However, the cross compiler executed fine on the x86_64 systems.
Other prereq's
You also need to make a copy of the ARM boards system libraries and include files. For either OABI or EABI, boot your board and create a tar file of the system:
cd / tar czf /net/home/maurik/tmp/arm_libs.tgz /usr/lib /usr/include /lib
You can exclude the /lib/modules and other junk, but why bother. Expand this tar file in the appropriate sysroot (/net/home/maurik/cross-compile/arm-linux-gnueabi)
Now: very important you need to fix up all the links in .../usr/lib that point to /lib and instead should point to ../../lib
TSLIB
Get the TSLIB from SVN: (svn co svn://svn.berlios.de/tslib/trunk/tslib tslib ) or get it from http://prdownload.berlios.de/tslib/tslib-1.0.tar.bz2
You need a patch, since the TS board does not give pressure info: http://projects.linuxtogo.org/pipermail/openembedded-commits/2009-July/029934.html (I hand edited this in, instead of using the patch.)
Now run:
./autogen.sh ./configure CC=arm-linux-gcc CXX=arm-linux-g++ PLUGIN_DIR=/net/home/maurik/cross-compile/arm-linux-gnu/usr/local/plugin -prefix=/net/home/maurik/cross-compile/arm-linux-gnu/usr/local -host=arm-linux OR ./configure CC=arm-linux-gcc CXX=arm-linux-g++ PLUGIN_DIR=/net/home/maurik/cross-compile/arm-linux-gnueabi/plugin -prefix=/net/home/maurik/cross-compile/arm-linux-gnueabi/ -host=arm-linux make make install
And on the arm board, in the tslib directory run
./configure make make install export TSLIB_CONFFILE=/usr/local/etc/ts.conf export TSLIB_CALIBFILE=/etc/pointercal export TSLIB_CONSOLEDEVICE=none export TSLIB_TSEVENTTYPE=H3600 export TSLIB_FBDEVICE=/dev/fb0 export TSLIB_TSDEVICE=/dev/input/event0 export TSLIB_PLUGINDIR=/usr/local/lib/ts
Then run /usr/local/bin/ts_calib, and follow directions. Presto!
Building the Qt/embedded
Now comes the tough stuff. I got the QT 4.5.2 and the QT 4.6 embedded distributions. They both work on OABI. Instructions here are for 4.6
Modifications required
Color Fix
First, the colors will be all wrong unless we force them to the correct configuration. Edit the file src/gui/embedded/qscreenlinuxfb_qws.cpp and before the line that says
grayscale = vinfo.grayscale;
add the following lines:
diff qscreenlinuxfb_qws.cpp qscreenlinuxfb_qws.cpp.~1~ 321,323d320 < // HACK Force the green length to 6: < vinfo.green.length=6;
Startup Fix
Got an "segmentation violation" on startup? You have two choices, one is to add -debug to the config and get a slow build. The other is to edit the file src/gui/embedded/qscreenlinuxfb_qws.cpp and avoid the call to useOffscreen():
taro:embedded> diff qscreenlinuxfb_qws.cpp qscreenlinuxfb_qws.cpp.~2~ 427c427 < canaccel = false; // useOffscreen(); --- > canaccel = useOffscreen();
mkspec changes
For the OABI, the mkspec/qws/linux-arm-g++/qmake.conf file reads:
# # qmake configuration for building with arm-linux-g++ #
include(../../common/g++.conf) include(../../common/linux.conf) include(../../common/qws.conf)
# modifications to g++.conf QMAKE_CC = arm-linux-gnu-gcc QMAKE_CXX = arm-linux-gnu-g++ QMAKE_LINK = arm-linux-gnu-g++ QMAKE_LINK_SHLIB = arm-linux-gnu-g++
# modifications to linux.conf QMAKE_AR = arm-linux-gnu-ar cqs QMAKE_OBJCOPY = arm-linux-gnu-objcopy QMAKE_STRIP = arm-linux-gnu-strip
# For tslib
QMAKE_INCDIR += /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/include QMAKE_LIBDIR += /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/lib QMAKE_LIBS += -lts load(qt_config)
and for EABI it reads:
# # qmake configuration for building with arm-linux-gnug++ #
include(../../common/g++.conf) include(../../common/linux.conf) include(../../common/qws.conf)
# modifications to g++.conf QMAKE_CFLAGS += -mcpu=ep9312 -mfpu=maverick -mfloat-abi=soft QMAKE_CXXFLAGS += -mcpu=ep9312 -mfpu=maverick -mfloat-abi=soft #QMAKE_LDFLAGS += -m32
QMAKE_CC = arm-linux-gnueabi-gcc QMAKE_CXX = arm-linux-gnueabi-g++ QMAKE_LINK = arm-linux-gnueabi-g++ QMAKE_LINK_SHLIB = arm-linux-gnueabi-g++
# modifications to linux.conf QMAKE_AR = arm-linux-gnueabi-ar cqs QMAKE_OBJCOPY = arm-linux-gnueabi-objcopy QMAKE_STRIP = arm-linux-gnueabi-strip QMAKE_INCDIR += /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/include QMAKE_LIBDIR += /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/lib QMAKE_LIBS += -lts -ldl -lz QMAKE_LIBS_THREAD = -lpthread -ldl -lrt -lz load(qt_config)
Building Qt
First, if you want a separate build directory, put it in "parralel" of the qt-everywhere-xxx directory (at the same level) rather than below it, which gives errors.
OABI
tar xzf qt-everywhere-opensource-src-4.6.0.tar.gz mkdir build-qt-arm-linux-gnu-4.6 cd build-qt-arm-linux-gnu-4.6 export PATH=/net/home/maurik/cross-compile/arm-linux-gnu/bin:$PATH ../qt-everywhere-opensource-src-4.6.0/configure -opensource -confirm-license -embedded arm -platform linux-g++-32 -xplatform qws/linux-arm-g++ -no-qvfb -depths all -prefix /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/Qt4.6 -no-webkit -no-script -no-javascript-jit -no-scripttools -qt-mouse-tslib -no-rpath make -j 6 make install
If you are lucky. That is it!
EABI
mkdir build-qt-arm-linux-gnueabi-4.6 cd build-qt-arm-linux-gnueabi-4.6 export PATH=/net/home/maurik/cross-compile/arm-linux-gnueabi/bin:$PATH ../qt-everywhere-opensource-src-4.6.0/configure -opensource -confirm-license -embedded arm -platform linux-g++-32 -xplatform qws/linux-arm-g++ -no-qvfb -depths all -prefix /net/home/maurik/cross-compile/arm-linux-gnu/usr/local/Qt4.6 -no-webkit -no-script -no-javascript-jit -no-scripttools -qt-mouse-tslib -no-rpath make -j 6 make install
Testing
Set the LD_LIBRARY_PATH to the Qt libraries, and set:
export QTDIR=<path to /usr/local/Qt4.6> export QWS_MOUSE_PROTO="tslib" export TSLIB_CONFFILE=/usr/local/etc/ts.conf export TSLIB_CALIBFILE=/etc/pointercal export TSLIB_CONSOLEDEVICE=none export TSLIB_TSEVENTTYPE=H3600 export TSLIB_FBDEVICE=/dev/fb0 export TSLIB_TSDEVICE=/dev/input/event0 export TSLIB_PLUGINDIR=/usr/local/lib/ts
Then run one of the examples:
$QTDIR/examples/widgets/analogclock/analogclock -qws
You may get an error if you don't have write permissions to /dev/fb0, or /dev/tty0. You could also get a an error about now owning the Qt data directory (when you are root and access over nfs with root_squash on).
and run any of the example or demo programs.
