forked from M-Labs/kirdy
61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
Markdown
# Building Rust embedded firmware on BSD
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Using the Rust stable compiler from the BSD ports is mostly a matter of removing the arbitrary limitations that have been built into the Rust toolchain.
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Get rid of the "nightly toolchain" check in cargo-xbuild:
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```
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diff --git a/src/lib.rs b/src/lib.rs
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index 204ad8f..9c61e39 100644
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--- a/src/lib.rs
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+++ b/src/lib.rs
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@@ -157,28 +157,11 @@ pub fn build(args: Args, command_name: &str, crate_config: Option<Config>) -> Re
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})
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})?;
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- // We can't build sysroot with stable or beta due to unstable features
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let sysroot = rustc::sysroot(verbose)?;
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- let src = match meta.channel {
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- Channel::Dev => rustc::Src::from_env().ok_or(anyhow!(
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+ let src = rustc::Src::from_env().ok_or(anyhow!(
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"The XARGO_RUST_SRC env variable must be set and point to the \
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- Rust source directory when working with the 'dev' channel",
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- ))?,
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- Channel::Nightly => {
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- if let Some(src) = rustc::Src::from_env() {
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- src
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- } else {
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- sysroot.src()?
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- }
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- }
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- Channel::Stable | Channel::Beta => {
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- bail!(
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- "The sysroot can't be built for the {:?} channel. \
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- Switch to nightly.",
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- meta.channel
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- );
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- }
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- };
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+ Rust source directory",
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+ ))?;
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let cmode = if let Some(triple) = args.target() {
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if triple == meta.host {
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```
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Run ``cargo install --path .`` to install the modified cargo-xbuild
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Get a copy of the Rust sources that corresponds to the installed compiler binary, and set up the environment accordingly:
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```
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> rustc --version
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rustc 1.72.1 (d5c2e9c34 2023-09-13) (built from a source tarball)
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> git clone --depth=1 --recurse-submodules --shallow-submodules https://github.com/rust-lang/rust --branch 1.72.1
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> export XARGO_RUST_SRC=`pwd`/rust/library
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```
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Disable other arbitrary checks in the Rust compiler:
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```
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> export RUSTC_BOOTSTRAP=1
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```
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And you can now simply run ``cargo xbuild`` to build the firmware.
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