These notes will set up a cross-compiling environment for Rust projects using only prebuilt Fedora RPMs with no emulation. While this works, it is unsupported and will leave the system RPM database in an odd state that could result in packages getting out of sync. It should only be used as a temporary measure if at all.
The example commands use aarch64 as the target architecure.
This script is a Tectonic installer for local development and testing. It creates a cluster of virtual machines on the same host that runs the script. All files, processes, and any other virtual resources that are created during its execution should be automatically removed on exit.
The first lines in the script list every command dependency, which can be
| #!/bin/bash -e | |
| # Select which Docker version to use on CoreOS with torcx. | |
| # Specify the available Docker version to enable. | |
| version=17.09 | |
| # Create modifiable torcx paths if they don't exist already. | |
| mkdir -p /etc/torcx/profiles /var/lib/torcx/store | |
| # Download the torcx manifest file for the currently running OS version. |
| #!/bin/bash -ex | |
| # Test IPSec with a tunnel between two containers. | |
| # Provide /proc/net/pfkey since af_key.ko apparently isn't autoloaded. | |
| sudo modprobe af_key | |
| # Start and prepare the containers. | |
| for host in left right | |
| do | |
| docker run \ |
| { | |
| "ignition": { "version": "2.0.0" }, | |
| "systemd": { | |
| "units": [ | |
| { | |
| "name": "auto-update-kmods.service", | |
| "enable": true, | |
| "contents": "[Unit]\nDescription=Install custom kernel modules\nAfter=lib-modules.mount network-online.target\nRequires=lib-modules.mount network-online.target\nConditionPathExists=!/opt/modules/%v\nConditionPathExistsGlob=/lib/modules/auto-update-kmods.d/*.sh\n\n[Service]\nType=oneshot\nExecStart=/bin/bash -ex /lib/modules/auto-update-kmods.sh\n\n[Install]\nWantedBy=multi-user.target\n" | |
| }, | |
| { |
| #!/bin/bash -e | |
| # Build a CentOS system with the configuration file from CoreOS. | |
| config_url='https://raw.githubusercontent.com/coreos/coreos-overlay/master/app-emulation/wa-linux-agent/files/waagent.conf' | |
| mirrorlist='http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os' | |
| mirror=$( | |
| IFS=$'\n' urls=($(curl --location --silent "$mirrorlist")) | |
| echo "${urls[$((RANDOM % ${#urls[@]}))]}" | |
| ) |
| /* cc -o noodel -lseccomp noodel.c */ | |
| #include <seccomp.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <unistd.h> | |
| int | |
| main (int argc, char *argv[]) | |
| { | |
| scmp_filter_ctx ctx; |
| #cloud-config | |
| hostname: "set-this" | |
| coreos: | |
| update: | |
| reboot-strategy: "off" | |
| units: | |
| - name: "default.target" | |
| command: "start" |
| [Unit] | |
| Description=Start the local Fedora installation in a container | |
| [email protected] [email protected] \ | |
| boot.mount mnt-fedora.mount opt.mount | |
| [email protected] [email protected] | |
| Requires=mnt-fedora.mount | |
| Wants=boot.mount opt.mount | |
| [Service] | |
| Delegate=yes |