Jelly-Bean pre-built images for FMs are now available for download at https://android-build.linaro.org/builds/~linaro-android/vexpress-rtsm-jb-gcc... Also available on the download page are the instructions to use JB prebuilt images for FMs.
To reproduce JB images for FMs, download linaro_android_build_cmds.sh from the "Downloads" section
$ wget http://snapshots.linaro.org/android/~linaro-android/vexpress-rtsm-jb-gcc47-a... $ chmod +x linaro_android_build_cmds.sh
Run: $ ./linaro_android_build_cmds.sh
To rebuild things, you can look in the script to see how things got built. In it you'll see that you can basically:
export TARGET_PRODUCT=vexpress_rtsm export TARGET_SIMULATOR=false export CPUS=`grep -c processor /proc/cpuinfo` export TARGET_TOOLS_PREFIX=android-toolchain-eabi/bin/arm-linux-androideabi- . build/envsetup.sh make -j${CPUS} boottarball systemtarball userdatatarball
Regards, Amit Pundir