Fork 0
Genode Packages collection https://git.sr.ht/~ehmry/genodepkgs/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

225 lines
7.3 KiB

2 years ago
`` ______ __ __
` / ____/__ ____ ____ ____/ /__ ____ / / ____ ______
/ / __/ _ \/ __ \/ __ \/ __ / _ \/ __ \/ / / __ `/ ___/
/ /_/ / __/ / / / /_/ / /_/ / __/ /_/ / , \ /_/ (__ )
2 years ago
` \____/\___/_/ /_/\____/\__,_/\___/ .___/_/ \_\_, /____/
`` /_/ /____/
3 years ago
[Genodepkgs](https://git.sr.ht/~ehmry/genodepkgs) is nexus of
[Nix](https://nixos.org/nix/) expressions related to the
[Genode OS framework](https://genode.org).
3 years ago
[Mailing list](https://lists.sr.ht/~ehmry/genodepkgs)
2 years ago
2 years ago
# Repository layout
- Native packages are at [packages](./packages/default.nix)
- Existing Nixpkgs packages are patched at [overlay](./overlay/default.nix)
2 years ago
- Tests are at [tests](./tests/default.nix)
2 years ago
- NixOS modules at [nixos-modules](./nixos-modules)
# Contributing
3 years ago
Patches can be submitted and issues reported via the
[mailing list](https://lists.sr.ht/~ehmry/genodepkgs). The mailing list is the
minimum viable mechanism for community development, and may be replaced later.
3 years ago
2 years ago
Issues may also be reported at the
[ticket tracker](https://todo.sr.ht/~ehmry/genodepkgs).
# Nix Flakes
This repository is structured as a Nix flake, which is an experimental extension
2 years ago
of Nix tooling. See https://www.tweag.io/posts/2020-05-25-flakes.html for an
2 years ago
introduction and tutorial.
2 years ago
## Build Caching
3 years ago
A binary cache is graciously provided by Cachix, the following link provides
instructions for enabling: https://app.cachix.org/cache/genodepkgs
## Building from flakes
$ git clone https://git.sr.ht/~ehmry/genodepkgs
$ cd genodepkgs
2 years ago
$ nix build .#checks.x86_64-linux.nova-x86
# View the log if the result is already cached:
2 years ago
$ nix log .#checks.x86_64-linux.nova-x86
# Packaging
Packaging is done using standard Nixpkgs methods, a `stdenv` is available for
cross-compilation. See [Solo5](./packages/solo5/default.nix) as an example.
2 years ago
## Cross-compiling Nixpkgs
Some existing packages from Nixpkgs can be built with little or no modification.
Nixpkgs is available at the path `.#legacyPackages.x86_64-linux-x86_64-genode`
(or `…-aarch64-genode`) and modifications to packages are made at an
[overlay](./overlay/default.nix). Some packages need patched, others require
additional features added to the Genode libc.
Packages that run on Linux as well as Genode should not be packaged here, those
should be added to Nixpkgs.
# Toolchain
The Genode Labs toolchain is available here only for Linux and in binary form.
However, an experimental LLVM cross-compiler is provided here. Bootstrapping GCC
has not been practical due to its recursive autotools build system.
2 years ago
The enter a shell with the toolchain:
2 years ago
nix shell .#legacyPackages.x86_64-linux-x86_64-genode.stdenv.cc
2 years ago
x86_64-unknown-genode-clang++ -v
3 years ago
# Tips and tricks
## How to build a Genode make target?
2 years ago
let flake = builtins.getFlake "genodepkgs";
in flake.packages.x86_64-linux-x86_64-genode.genodeSources.make "app/ping"
## How to build a Genode depot package?
2 years ago
let flake = builtins.getFlake "genodepkgs";
in flake.packages.x86_64-linux-x86_64-genode.genodeSources.depot "wifi_drv"
## How to add missing ports to a depot package?
The missing ports as indicated by a depot build failure must be added to
[targets.nix](./overlay/genode/targets.nix). To continue from the previous
example, this would be sufficient:
wifi_drv = { portInputs = [ dde_linux libc openssl ]; };
## How to add undefined ports?
Should a required port not be defined, it must be added to
[ports.nix](./overlay/genode/ports.nix). Initially it should be sufficient to
define the port as an empty attribute set, run the build again, and then add the
hash found in the successive build error.
To continue from the previous example:
dde_linux = { };
And after the reattempting the build a fixed-output hash should be produced,
this must now be added to the port definitions.
dde_linux = {
hash = "sha256-3G5Mprv9ZBNhDJRuVF6Nrkp3KbFaN10IKFq0OdyAY9M="; };
Should the port preparation fail do to missing utilities, these must be added to
the port definition using a `nativeBuildInputs` attribute.
3 years ago
Note that the hash checked into `ports.nix` is an *output hash*. The port hash
within the Genode source tree is an *explicit input hash* and the output of
the port preparation is non-deterministic.
## Enter an environment compatible with the Genode Labs build scripts
nix dev-shell genodepkgs
make -C build/x86_64 run/bomb
# Glossary
Some of terms that follow are necessary for understanding packaging methodology,
Others are simply introduced as an aid to the reader:
- *Upstream* - repositories packaged by expressions in this repository
- *Downstream* - repositories depending on this repository
- *OS ABI* - The binary interface to an operating system. In the case of Genode
this does not include kernel interfaces, as system calls are abstracted via
dynamically linked procedures.
- `localSystem` - the CPU and OS ABI pair used to evaluate and compile
packages. Genode cannot natively instantiate Nix derivations, therefore it
cannot be a `localSystem` ABI.
- `crossSystem` - the target CPU and OS ABI pair for packages. In the common
case the ABI will be Genode. In the case of tooling it may be the same as
`localSystem`. For software that runs bare-metal the CPU is significant but
ABI is irrelevant.
- `buildPlatform` - equivalent to `localSystem`.
- `hostPlatform` - the platform on which a package will execute.
- `targetPlatform` - the platform for which a package will produce artifacts.
This is only significant for software such as compilers. The respective
build, host, and target platform of a compiler that was built on a Solaris,
executes on Genode, and produces only Haiku binaries would be Solaris,
Genode, and Haiku.
- *Flake* - a code repository containing a `flake.nix` file describing
dependency repositories. The evaluation of flakes may only form ascyclic
graphs. Repositories packaged here may themselves contain a `flake.nix`
file that refers to this repository, but these repositories cannot be inputs
to the Genodepkgs flake.
- *Genode core* - Genode component of highest privilege. The core is located
conceptually at the bottom and root of the component tree. Core might be
directly above the kernel, or acting as the kernel. The role of core is a
subset of the role of the kernel in a monolithic system.
- *Lower* - lowering a subsystem is moving it closer to the Genode core
and increasing privilege.
- *Raise* - raising a subsystem is moving it further away from the Genode core
and decreasing privilege.
- *Package* - *undefined*
# Legal
2 years ago
This repository is published under MIT licensing consistent with Nixpkgs.
2 years ago
> Note: MIT license does not apply to the packages built by Nixpkgs,
> merely to the files in this repository (the Nix expressions, build
> scripts, NixOS modules, etc.). It also might not apply to patches
> included in Nixpkgs, which may be derivative works of the packages to
> which they apply. The aforementioned artifacts are all covered by the
> licenses of the respective packages.