mirror of
https://github.com/serde-rs/json.git
synced 2025-10-02 15:26:00 +00:00
6e00729f1f
cfg(target_arch) refers to the target of the current code being compiled. In the case of the build script, that's the host architecture. Cargo provides a separate env variable to build scripts to determine the target arch of the library as opposed to the target arch of the build script.
16 lines
471 B
Rust
16 lines
471 B
Rust
use std::env;
|
|
|
|
fn main() {
|
|
// Decide ideal limb width for arithmetic in the float parser. Refer to
|
|
// src/lexical/math.rs for where this has an effect.
|
|
let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
|
|
match target_arch.as_str() {
|
|
"aarch64" | "mips64" | "powerpc64" | "x86_64" => {
|
|
println!("cargo:rustc-cfg=limb_width_64");
|
|
}
|
|
_ => {
|
|
println!("cargo:rustc-cfg=limb_width_32");
|
|
}
|
|
}
|
|
}
|