53 lines
1.9 KiB
Rust
53 lines
1.9 KiB
Rust
//! This build script copies the `memory.x` file from the crate root into
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//! a directory where the linker can always find it at build time.
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//! For many projects this is optional, as the linker always searches the
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//! project root directory -- wherever `Cargo.toml` is. However, if you
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//! are using a workspace or have a more complicated build setup, this
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//! build script becomes required. Additionally, by requesting that
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//! Cargo re-run the build script whenever `memory.x` is changed,
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//! updating `memory.x` ensures a rebuild of the application with the
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//! new memory settings.
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use std::env;
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use std::fs::File;
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use std::io::Write;
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use std::path::PathBuf;
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enum Target {
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Pico,
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Pico2,
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}
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fn main() {
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let target = match env::var("TARGET").unwrap().as_str() {
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"thumbv6m-none-eabi" => Target::Pico,
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"thumbv8m.main-none-eabihf" => Target::Pico2,
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t => panic!("Unsupported target : {}", t),
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};
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// Put `memory.x` in our output directory and ensure it's
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// on the linker search path.
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let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
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File::create(out.join("memory.x"))
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.unwrap()
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.write_all(match target {
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Target::Pico => include_bytes!("memory_rp2040.x"),
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Target::Pico2 => include_bytes!("memory_rp235x.x"),
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})
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.unwrap();
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println!("cargo:rustc-link-search={}", out.display());
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// By default, Cargo will re-run a build script whenever
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// any file in the project changes. By specifying `memory.x`
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// here, we ensure the build script is only re-run when
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// `memory.x` is changed.
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println!("cargo:rerun-if-changed=memory.x");
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println!("cargo:rustc-link-arg-bins=--nmagic");
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println!("cargo:rustc-link-arg-bins=-Tlink.x");
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if let Target::Pico = target {
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println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
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}
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println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
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}
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