LLVM Linux Setup

Scripts to set up a fresh Linux OS for building LLVM Linux

Steps to setup the VM and run magic build scripts

1. Set up a fresh Ubuntu 14.04 VM
2. In VirtualBox, increase the VM’s allocated memory to 2MB
3. Resize the existing virtual disk to 20 GB as per this Gist
4. Yes, the cloning and building will use up more than vagrant’s default 8 GB
5. Copy xen-slicing-pq.hg and build scripts into vagrant

OPTIONS=`vagrant ssh-config | grep -v '^Host ' | awk -v ORS=' ' 'NF{print "-o " $1 "=" $2}'`
scp -r ${OPTIONS} /path/to/xen-slicing-pq.hg vagrant:~/
scp ${OPTIONS} /path/to/magic-build-script.sh vagrant:~/
scp ${OPTIONS} /path/to/increase_swap.sh vagrant:~/

1. Increases from 512 MB to 2 GB; otherwise LLVM build will fail at ~96% completion
2. vagrant ssh
3. sudo ./increase_swap.sh
4. sudo ./magic-build-script.sh
5. Will prompt for “Build LLVM Linux? 1) Y 2) N” after dependencies are installed and sources are cloned.
6. Clone buildroot. (make sync in /vagrant/llvmlinux will fail b/c the old repo address git.buildroot.net/git/buildroot.git has not been updated.)
7. cd /vagrant/llvmlinux/test/buildroot/src
8. git clone git://git.busybox.net/buildroot
9. Remove the patch below; it will fail to be applied and will block the rest of the build from progressing.
10. cd /vagrant/llvmlinux/targets/x86_64/patches
11. Open the text file series
12. Remove the line with correct-size_index-table-before-replacing-the-bootst.patch 1. Note: As of 26/06/2015, this patch is symlinked from targets/x86_64/patches/ to targets/arch/all/patches/, but the actual path is one level deeper under targets/arch/all/patches/ARCHIVE/.
13. Save and exit
14. To re-sync sources and rebuild:
15. cd /vagrant/llvmlinux/targets/x86_64
16. make sync-all
17. make