View source for CSSU-thumb toolchain setup (gcc4.7.2-linaro)

This document describes how to setup the CSSU-thumb toolchain (gcc4.7.2-linaro) in scratchbox.


''GCC 4.7.2 does '''not''' produce thumb binaries by default, you should pass -mthumb if you want thumb resulting executables! without -mthumb it produces regular ARM ELFs''


1. You need to have [http://wiki.maemo.org/Documentation/Maemo_5_Final_SDK_Installation ScratchBox] environment already set up.

2. Download [http://maemo.merlin1991.at/cssu/develdebs/gcc-4.7.2_fremantle_armel/linaro-4.7-2012.07-fremantle-armv7a.tar.bz2 gcc-4.7.2-linaro toolchain] and extract it under /scratchbox/compilers (may need root privileges for extracting there)
 tar xvf linaro-4.7-2012.07-fremantle-armv7a.tar.bz2

3. Create new ScratchBox target FREMANTLE_ARMEL_GCC472

- Login to ScratchBox 

 $ /scratchbox/login

- Create new ScratchBox target

 [sbox->:~]sb-conf st FREMANTLE_ARMEL_GCC472 -c linaro-4.7-2012.07-fremantle-armv7a -d qemu:perl:debian-etch:doctools:svn:git -t qemu-arm-sb

replace debian-etch with debian-squeeze if you use ScratchBox Hathor release 

 [sbox->:~]sb-conf se FREMANTLE_ARMEL_GCC472

 [sbox-FREMANTLE_ARMEL_GCC472: ~] > sb-conf rs maemo-sdk-rootstrap_5.0_20.2010.36-2_armel.tgz

 [sbox-FREMANTLE_ARMEL_GCC472: ~] > sb-conf in -edL

 [sbox-FREMANTLE_ARMEL_GCC472: ~] > dpkg -i /scratchbox/compilers/linaro-4.7-2012.07-fremantle-armv7a/packages/libfakeroot_1.14.4-0+sb1_armel.deb

 [sbox-FREMANTLE_ARMEL_GCC472: ~] > apt-get update
 [sbox-FREMANTLE_ARMEL_GCC472: ~] > fakeroot apt-get install maemo-sdk-debug

- Accept [http://tablets-dev.nokia.com/eula/index.php Maemo5 SDK EULA] and copy the URL. Add nokia-binaries repository URL to /etc/apt/sources.list 

 [sbox-FREMANTLE_ARMEL_GCC472: ~] >apt-get update
 [sbox-FREMANTLE_ARMEL_GCC472: ~] >fakeroot apt-get install nokia-binaries nokia-apps

 [sbox-FREMANTLE_ARMEL_GCC472: ~] >rm -rf /targets/FREMANTLE_ARMEL_GCC472/opt
 [sbox-FREMANTLE_ARMEL_GCC472: ~] >mkdir /targets/FREMANTLE_ARMEL_GCC472/opt

- Download ScratchBox errata dependency provider package [http://maemo.merlin1991.at/cssu/develdebs/gcc-4.7.2_fremantle_armel/sb-thumb-errata-provider_0.1-1_armel.deb sb-thumb-errata-provider_0.1-1_armel.deb] and install it

 dpkg -i sb-thumb-errata-provider_0.1-1_armel.deb

- Add CSSU-testing and CSSU-thumb repos to your /etc/apt/sources.list

 echo "deb http://repository.maemo.org/community-testing/ fremantle free non-free" >> /etc/apt/sources.list
 echo "deb-src http://repository.maemo.org/community-testing/ fremantle free" >> /etc/apt/sources.list

 echo "deb http://maemo.merlin1991.at/cssu/community-thumb/ fremantle free non-free" >> /etc/apt/sources.list
 echo "deb-src http://maemo.merlin1991.at/cssu/community-thumb/ fremantle free" >> /etc/apt/sources.list

Remove unneeded package maemo-core-debug
 apt-get remove maemo-core-debug

Upgrade your target to latest CSSU-thumb

 [sbox-FREMANTLE_ARMEL_GCC472: ~] >apt-get update
 [sbox-FREMANTLE_ARMEL_GCC472: ~] >fakeroot apt-get upgrade

'''IF ERROR''' When you now get an error the next step will show how to solve this, otherwise go to the step where libstdc++6 get installed.

 Errors were encountered while processing: /var/cache/apt/archives/libssl0.9.8-dbg_0.9.8zh-1+maemo1+0m5+0cssu0_armel.deb

'''IF ERROR''' Solve it with otherwise go next step.

 fakeroot apt-get -f install

'''IF ERROR''' Next errors will pop up.

 Sub-process dpkg returned an error code (1)
 Setting up libgtk2.0-0 (2:2.14.7-1maemo34+0cssu2+thumb0) ...
 qemu: uncaught target signal 11 (Segmentation fault) - core dumped
 dpkg: error processing libgtk2.0-0 (--configure):
 subprocess installed post-installation script returned error exit status 126

'''IF ERROR''' Solve it by editing following file:

 vi /var/lib/dpkg/info/libgtk2.0-0.postinst

'''IF ERROR''' The command in the postinst script could not run, so we will comment out the following lines.

 #if [ "$1" = configure ]; then
 #   Regenerate theme caches which may need updating after gtk changes
 #  if command -v hildon-theme-recache-all >/dev/null 2>&1; then
 #    hildon-theme-recache-all
 #  fi
 #fi

'''IF ERROR''' There is another script which fails.

 vi /var/lib/dpkg/info/libgtk2.0-bin.postinst

'''IF ERROR''' So we will comment out the following lines.

 #/usr/sbin/update-gtk-immodules
 #/usr/sbin/update-gdkpixbuf-loaders

'''IF ERROR''' Now fix it.

 fakeroot apt-get -f install

Download and install [http://maemo.merlin1991.at/cssu/develdebs/gcc-4.7.2_fremantle_armel/packages/libstdc%2b%2b6-dev_4.7.2-0%2bcssu0_armel.deb libstdc++6-dev_4.7.2-0+cssu0_armel.deb]
 dpkg -i libstdc++6-dev_4.7.2-0+cssu0_armel.deb

''It can complain about libstdc++6 on system is 4.2.1-4maemo13+0m5.''


Create FREMANTLE_ARMEL_GCC472.environment in your /targets directory

 echo "export DEB_BUILD_OPTIONS=maemo-launcher,thumb,vfp" > /targets/FREMANTLE_ARMEL_GCC472.environment
 echo "export PIXMAN_DISABLE=arm-neon" >> /targets/FREMANTLE_ARMEL_GCC472.environment

Your target should be ok at that point. Make sure to reenter the target, so updated FREMANTLE_ARMEL_GCC472.environment to take effect

 fakeroot apt-get -f install

''can fix that by installing the proper libstdc++6 afterwards.''


Interesting new flags can be: <nowiki>-mfpu=neon -ftree-vectorize -fgraphite -lto</nowiki>

The compiler will give the following warning:
 /scratchbox/compilers/linaro-4.7-2012.07-fremantle-armv7a/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.2/../../../../arm-none-linux-gnueabi/bin/ld: BFD (GNU Binutils) 2.22 assertion fail ../../../sources/binutils-2.22/bfd/elf32-arm.c:11467
These warnings can be ignored. For some reason, the linker thinks that the object is hardfp, but as it is softfp the assertion fails.

'''ERROR ON UPGRADE''' A note I made.

 fakeroot apt-get upgrade
 fakeroot apt-get install libcurl3
 fakeroot apt-get install ke-recv
 fakeroot apt-get install obexd

'''ERROR ON UPGRADE''' To install this clock-ui we need another resource.

 echo "deb http://maemo.muarf.org/apt-mirror/mirror/downloads.maemo.nokia.com/fremantle/ssu/mr0 ./" >> /etc/apt/sources.list

 fakeroot apt-get install clock-ui



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