I got much further by switching to Vagrant precise32 and installing the dependencies from the BSP guide. Now it's stopped the build here:
ERROR: Function failed: do_validate_branches (see /home/vagrant/galileo_build/meta-clanton_v1.0.0/yocto_build/tmp/work/clanton-poky-linux-uclibc/linux-yocto-clanton/3.8-r0/temp/log.do_validate_branches.27492 for further information)
ERROR: Logfile of failure stored in: /home/vagrant/galileo_build/meta-clanton_v1.0.0/yocto_build/tmp/work/clanton-poky-linux-uclibc/linux-yocto-clanton/3.8-r0/temp/log.do_validate_branches.27492
Log data follows:
| DEBUG: Executing shell function do_validate_branches
| ERROR: Function failed: do_validate_branches (see /home/vagrant/galileo_build/meta-clanton_v1.0.0/yocto_build/tmp/work/clanton-poky-linux-uclibc/linux-yocto-clanton/3.8-r0/temp/log.do_validate_branches.27492 for further information)
ERROR: Task 236 (/home/vagrant/galileo_build/meta-clanton_v1.0.0/meta-clanton-bsp/recipes-kernel/linux/linux-yocto-clanton_3.8.bb, do_validate_branches) failed with exit code '1'
NOTE: Tasks Summary: Attempted 919 tasks of which 725 didn't need to be rerun and 1 failed.
This log message:
suggests me it may be resource exhaustion on your VM, I saw such things in the past when builds were failing with mysterious errors just because of that. Adding resources to the VM or decreasing amount of threads and tasks in the local.conf always helped for such errors.
Default compilation settings in the yocto_build/conf/local.conf are rather aggressive and require something like at least 2 vCPU VM with 4GB vRAM (at least that's the config which worked for me and e.g. 2GB vRAM were failing). The easiest way to fix this type of errors is to tweak two variables in local.conf:
BB_NUMBER_THREADS = "12"
PARALLEL_MAKE = "-j 14"
The above are defaults, the rule of thumb is to set 2 threads and make processes per vCPU, that is a safe conservative setting. With such settings 2GB vRAM worked fine for me, AFAIR.
As far as dependencies are concerned - the BSP Build Guide has them all, I didn't need anything else after carefully installing all what's mentioned there.
BTW, a while ago I've created a VM image, which has all the necessary prerequisites installed and checked to compile fine, check this thread out, maybe it will be of use for you: Linux VM pre-configured for Galileo BSP building - released