Hi Wookey, I just managed to get it to compile on oneiric. I think I figured out the problem related to pthreads: I had to install libpthread-stubs0 libpthread-stubs0-dev for the current architecture, not the target architecture, which is a bit weird, but it works. The configure script would complain about missing pthreads stubs, which is why I installed it first with xapt, without success, but when I installed it for the current architecture, the configure script worked and FreeRDP built without linker errors.
I used your updated xapt package in oneiric to correctly fetch the stuff. Here are my updated notes: # bootstrap ubuntu oneiric sudo debootstrap oneiric oneiric-armel # chroot to new environment sudo chroot oneiric-armel # mount partitions mount -t proc proc /proc mount -t devpts none /dev/pts # export environment variables export LC_ALL=C # append "universe" after "main" in sources.list sed -i 's/main/main universe/' /etc/apt/sources.list # add source repository sudo echo "deb [arch=armel] http://ports.ubuntu.com/ oneiric main universe" >> /etc/apt/sources.list # update and install packages apt-get update apt-get install gcc-arm-linux-gnueabi libgcc1-armel-cross xapt wget wget http://wookware.org/software/repo/pool/main/e/emdebian-crush/xapt_2.2.16ubuntu1_all.deb dpkg -i xapt_2.2.16ubuntu1_all.deb sudo apt-get install libpthread-stubs0 libpthread-stubs0-dev sudo apt-get install libtool automake autoconf git pkg-config xapt -a armel -m libssl-dev libx11-dev libxv-dev libxkbfile-dev libxcursor-dev libasound2-dev libxcb1 libxcb1-dev libdirectfb-dev libc6 libc6-dev zlib1g zlib1g-dev libcups2-dev libpthread-stubs0 libpthread-stubs0-dev PKG_CONFIG_PATH=/usr/arm-linux-gnueabi/lib/pkgconfig ./configure --host=arm-linux-gnueabi I am now wondering if the same would work in natty. I'll have to give it a try, if it works, I won't have to update my pandaboard to oneiric. On Fri, Jun 24, 2011 at 5:49 AM, Wookey <woo...@wookware.org> wrote: > +++ Marc-André Moreau [2011-06-23 17:40 -0400]: > > [I wrote a response to this for 4hrs last night then my mail server > crashed and lost it all - <mutter>. trying agin...] > > > Hi, > > > > I am Marc-Andre from the FreeRDP project, an open source RDP client. I > want to > > work on optimizing FreeRDP for ARM using the NEON processor extensions. > > Welome > > > It is my first time cross-compiling, so thank you for your understanding. > > Welcome to the joyful world of cross-building :-) > > > I have asked some questions on IRC, and read various pages from the wiki, > but I > > haven't managed to successfully cross-compile FreeRDP yet. Compiling > directly > > on the pandaboard works, but it is atrociously slow. I have made a chroot > > environment following and adapting the instructions from the following > wiki > > page: > https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/UsingXdeb > > Nothing wrong with this method, and it is reliable, but I find it > quicker and easier to use multistrap and do: > multistrap -f > > > I have tried both xdeb and xapt, both causing problems. > > > xapt: > > > > I managed to fetch and convert packages with xapt, using the following > command: > > sudo xapt -a armel -k -b --suite natty --mirror http://ports.ubuntu.com/ > > libssl-dev libx11-dev libxv-dev libxkbfile-dev libxcursor-dev > libasound2-dev > > libxcb1 libxcb1-dev libdirectfb-dev libc6 libc6-dev zlib1g zlib1g-dev > > > > The problem is then that xapt will fail to install the converted > packages, > > saying the package architecture is different from the current > architecture, as > > well as missing dependencies. I worked around the problem with this ugly > hack: > > > > cd /var/lib/xapt/output/ > > sudo dpkg -i --force-all *.deb > > You are suffering from this problem: > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629595 which is > because we are in the middle of a transition to multiarch packages. > When xapt/dpkg-cross were written it was assumed that thay would > simply ignore multiarched packages. However in practice it turns out > that that's not the case and currently they need to be converted back > to old-style locations. that needs the -m option supplying to xapt. > The version in natty is too old to have option. > > So if you do sudo xapt -a armel -b libssl-dev libx11-dev libxv-dev \ > libxkbfile-dev libxcursor-dev libasound2-dev libxcb1 libxcb1-dev \ > libdirectfb-dev libc6 libc6-dev zlib1g zlib1g-dev libcups2-dev > > on a wheezy box/chroot then all that stuff get downloaded, converted > and installed correctly. > > > Following this, I could get the FreeRDP configure script to work, even > though > > it would fail to detect X11 properly: > > > > PKG_CONFIG_PATH=/usr/arm-linux-gnueabi/lib/pkgconfig ./configure --host= > > arm-linux-gnueabi --with-neon > > X11 is detected OK for me: > FreeRDP configure result: > > Cryptography : openssl > TLS : enabled > Sound : yes > Printer : no > CUnit : no > X11 : yes > DirectFB : no > > > > When trying to build after that, it will still fail to link in the end, > > complaining about missing libraries such as zlib, X11, crypto, etc. I > tried > > installing various packages more with xapt, but I couldn't get it to > work. > > If I do PKG_CONFIG_LIBDIR=/usr/arm-linux-gnueabi/lib/pkgconfig > dpkg-buildpackage -aarmel > > then it all builds OK (on wheezy), except that the printer support is > not found. The confiure script needs checking to find out why that's > failing. That path-setting shouldn't be neeed either but it's not > working without it, even with the cross-version of pkg-config > installed. Again, needs further investigation. > > You can work round the cups non-identificatin with > HAVE_CUPS=1 PKG_CONFIG_LIBDIR=/usr/arm-linux-gnueabi/lib/pkgconfig > dpkg-buildpackage -aarmel > > To get this working on natty you would need to get the current xapt, an > ubuntu port of which is available here: > > http://wookware.org/software/repo/ natty main > or just here: > > http://wookware.org/software/repo/pool/main/e/emdebian-crush/xapt_2.2.16ubuntu1_all.deb > > however there is then a link failure, when it tries to link the wrong > arch of libpthread.so: > /usr/lib/gcc/arm-linux-gnueabi/4.5.2/../../../../arm-linux-gnueabi/bin/ld: > skipping incompatible /usr/lib/x86_64-linux-gnu/libpthread.so when > searching for -lpthread > /usr/lib/x86_64-linux-gnu/libpthread.a: could not read symbols: File format > not recognized > collect2: ld returned 1 exit status > > Again - needs looking into. > > > xdeb: > > > > I tried the following: > > root@workstation:/# xdeb -a armel --prefer-apt libssl-dev libx11-dev > libxv-dev > > libxkbfile-dev libxcursor-dev libasound2-dev > >... > > No source package found: libssl-dev > > > > Or, alternatively, the following: > > root@workstation:/# xdeb -a armel --convert libssl-dev libx11-dev > libxv-dev > > libxkbfile-dev libxcursor-dev libasound2-dev > >.. > > IOError: [Errno 2] No such file or directory: './libssl-dev' > > > > Here is my sources.list file: > > root@workstation:/# cat /etc/apt/sources.list > > deb http://archive.ubuntu.com/ubuntu natty main universe > > deb-src http://archive.ubuntu.com/ubuntu natty main universe > > deb [arch=armel] http://ports.ubuntu.com/ natty main universe > > deb-src [arch=armel] http://ports.ubuntu.com/ natty main universe > > That looks OK (except the last line should be: > deb-src http://ports.ubuntu.com/ natty main universe > (It doesn't actually break anything - just makes no sense - Have I > left that in a doc somewhere?) > > So for xdeb you want this command: > > xdeb -a armel --prefer-apt --only-explicit freerdp > > On wheezy that dies quickly with a package conflict: > he following packages have unmet dependencies: > heimdal-dev : Conflicts: libkrb5-dev but 1.9.1+dfsg-1+b1 is to be > installed > libdb-dev : Depends: libdb5.1-dev but it is not going to be installed > Conflicts: libdb4.8-dev but 4.8.30-8 is to be installed > libdb4.8-dev : Conflicts: libdb-dev but 5.1.4 is to be installed > libkrb5-dev : Conflicts: heimdal-dev but 1.4.0-6 is to be installed > unixodbc-dev : Conflicts: libiodbc2-dev but 3.52.7-2 is to be installed > E: Broken packages > > Not sure what's going on there, but it's not much use. > > On natty things go much better and it downloads, crosses and builds a > load of stuff until falling over with : > > pkg-deb: building package libosmesa6-armel-cross' in > ./libosmesa6-armel-cross_7.10.2-0ubuntu2_all.deb'. > dpkg-cross: package libegl1-mesa-drivers doesn't provide any useful files. > Skipping. > > Which is due to this bug: > https://bugs.launchpad.net/ubuntu/+source/xdeb/+bug/731079 > (xdeb stops if it comes across a package it thought it should cross > which is in fact dpkg-cross 'NULL'). This is rather annoying and I > think I have a fix mostly-done but it's not merged yet - need to check > where that got to. You can fix it by adding the offending package to > the xdeb blacklist )that's how it currently expects to work): > so add libosmesa6 to /etc/xdeb/xdeb.conf in the 'blacklist' section. > > However after doing that it doesn't get much further before: > .:terminate called after throwing an instance of 'std::out_of_range' > > > I'm stuck at this point. Can anybody point me towards possible solution > paths > > on how to cross-compile FreeRDP for ARM, given the above information? > > So, the easiest way to get cross-building is to do it on a debian > wheezy machine/chroot where the tools and build work OK. As you want > to do neon dev then you may need to install a new-enough > cross-toolchain, which probably means a linaro one. > > I'll look into the natty build failures and see if we can get that > going for you. This is clearly a package that ought to cross OK. > > So, now you know why people native-build :-) there are an awful lot > fewer things to go wrong and the tools are much more mature. There is > plenty of work going on at the moment to improve the situation, and at > least your source package is farily well-behaved (many aren't). It > does look like it needs a couple of fixes though so a plain > dpkg-buildpackage -aarmel would work as expected. > > So, is a wheezy-based build sufficient for you for the time being? Or > do you have to have it building on natty to do useful dev? > > Wookey > -- > Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM > http://wookware.org/ >
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