b30e183cd8
The build host (Ubuntu 192.168.58.8) has no internet access to crates.io mirrors, so crc32fast is vendored next to vendor/ethercrab and patched in via [patch.crates-io]. Binary is linked with rust-lld (no cross gcc).
28 lines
867 B
Rust
28 lines
867 B
Rust
use std::{env, process::Command};
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fn main() {
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if let Some(minor_version) = minor_rustc_version() {
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// rustc 1.80 stabilized ARM CRC32 intrinsics:
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// https://doc.rust-lang.org/nightly/core/arch/aarch64/fn.__crc32d.html
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if minor_version >= 80 {
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println!("cargo:rustc-cfg=stable_arm_crc32_intrinsics");
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println!("cargo:rustc-check-cfg=cfg(stable_arm_crc32_intrinsics)");
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}
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}
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}
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fn minor_rustc_version() -> Option<u32> {
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Command::new(env::var_os("RUSTC")?)
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.arg("--version")
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.output()
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.ok()
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.and_then(|output| {
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std::str::from_utf8(&output.stdout).ok().and_then(|output| {
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output
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.split('.')
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.nth(1)
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.and_then(|minor_version| minor_version.parse().ok())
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})
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})
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}
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