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7f3ffbc8c2
This commit goes through and updates various `#[cfg]` as appropriate to get the wasm64-unknown-unknown target behaving similarly to the wasm32-unknown-unknown target. Most of this is just updating various conditions for `target_arch = "wasm32"` to also account for `target_arch = "wasm64"` where appropriate. This commit also lists `wasm64` as an allow-listed architecture to not have the `restricted_std` feature enabled, enabling experimentation with `-Z build-std` externally. The main goal of this commit is to enable playing around with `wasm64-unknown-unknown` externally via `-Z build-std` in a way that's similar to the `wasm32-unknown-unknown` target. These targets are effectively the same and only differ in their pointer size, but wasm64 is much newer and has much less ecosystem/library support so it'll still take time to get wasm64 fully-fledged.
51 lines
1.9 KiB
Rust
51 lines
1.9 KiB
Rust
use std::env;
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fn main() {
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println!("cargo:rerun-if-changed=build.rs");
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let target = env::var("TARGET").expect("TARGET was not set");
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if target.contains("freebsd") {
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if env::var("RUST_STD_FREEBSD_12_ABI").is_ok() {
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println!("cargo:rustc-cfg=freebsd12");
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}
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} else if target.contains("linux")
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|| target.contains("netbsd")
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|| target.contains("dragonfly")
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|| target.contains("openbsd")
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|| target.contains("solaris")
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|| target.contains("illumos")
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|| target.contains("apple-darwin")
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|| target.contains("apple-ios")
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|| target.contains("uwp")
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|| target.contains("windows")
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|| target.contains("fuchsia")
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|| (target.contains("sgx") && target.contains("fortanix"))
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|| target.contains("hermit")
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|| target.contains("l4re")
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|| target.contains("redox")
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|| target.contains("haiku")
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|| target.contains("vxworks")
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|| target.contains("wasm32")
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|| target.contains("wasm64")
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|| target.contains("asmjs")
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|| target.contains("espidf")
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|| target.contains("solid")
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{
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// These platforms don't have any special requirements.
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} else {
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// This is for Cargo's build-std support, to mark std as unstable for
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// typically no_std platforms.
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// This covers:
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// - os=none ("bare metal" targets)
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// - mipsel-sony-psp
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// - nvptx64-nvidia-cuda
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// - arch=avr
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// - tvos (aarch64-apple-tvos, x86_64-apple-tvos)
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// - uefi (x86_64-unknown-uefi, i686-unknown-uefi)
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// - JSON targets
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// - Any new targets that have not been explicitly added above.
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println!("cargo:rustc-cfg=feature=\"restricted-std\"");
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}
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println!("cargo:rustc-env=STD_ENV_ARCH={}", env::var("CARGO_CFG_TARGET_ARCH").unwrap());
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println!("cargo:rustc-cfg=backtrace_in_libstd");
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}
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