Rusticl¶
Rusticl is an OpenCL implementation on top of Gallium drivers.
Enabling¶
In order to use Rusticl on any platform the environment variable
RUSTICL_ENABLE
has to be used. Rusticl does not advertise devices
for any driver by default yet as doing so can impact system stability until
remaining core issues are ironed out.
Building¶
To build Rusticl you need to satisfy the following build dependencies:
rustc
rustfmt
(highly recommended, but only required for CI builds or when authoring patches)bindgen
LLVM built with
libclc
and-DLLVM_ENABLE_DUMP=ON
.SPIRV-LLVM-Translator for a
libLLVMSPIRVLib.so
matching your version of LLVM, i.e. if you’re using LLVM 15 (libLLVM.so.15
), then you need alibLLVMSPIRVLib.so.15
.
The minimum versions to build Rusticl are:
Rust: 1.76
Meson: 1.4.0
Bindgen: 0.65.0
LLVM: 15.0.0
Clang: 15.0.0 Updating clang requires a rebuilt of mesa and rusticl if and only if the value of
CLANG_RESOURCE_DIR
changes. It is defined throughclang/Config/config.h
.SPIRV-Tools: any version (recommended: v2022.3)
Afterwards you only need to add -Dgallium-rusticl=true -Dllvm=enabled
-Drust_std=2021
to your build options.
Most of the code related to Mesa’s C code lives inside /mesa
, with
the occasional use of enums, structs or constants through the code base.
If you need help ping karolherbst
either in #dri-devel
or
#rusticl
on OFTC.
Contributing¶
The minimum configuration you need to start developing with rust
is RUSTC=clippy-driver meson configure -Dgallium-rusticl=true
-Dllvm=enabled -Drust_std=2021
. In addition you probably want to enable
any device drivers on your platform. Some device drivers as well as some
features are locked behind flags during runtime. See
Rusticl environment variables for
more info.
All patches that are potentially conformance breaking and also patches that add new features should be ran against the appropriate conformance tests.
Also, make sure the formatting is in order before submitting code. That
can easily be done via git ls-files */{lib,main}.rs | xargs rustfmt
.
When submitting Merge Requests or filing bugs related to Rusticl, make
sure to add the Rusticl
label so people subscribed to that Label get
pinged.
Known issues¶
One issue you might come across is, that the Rust edition meson sets is
not right. This is a known meson bug and in order to
fix it, simply run meson configure $your_build_dir -Drust_std=2021