mirror of
https://github.com/rust-lang/rust
synced 2024-07-08 21:42:29 +00:00
f9457fb809
The libc crate is already responsible for linking in the appropriate libraries, and std doing the same thing results in duplicated library names on the linker command line. Removing this duplication slightly reduces linker time, and makes it simpler to adjust the set or order of linked libraries in one place (such as to add static linking support).
92 lines
3.9 KiB
Rust
92 lines
3.9 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("linux") {
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if target.contains("android") {
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println!("cargo:rustc-link-lib=dl");
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println!("cargo:rustc-link-lib=log");
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println!("cargo:rustc-link-lib=gcc");
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}
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} else if target.contains("freebsd") {
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println!("cargo:rustc-link-lib=execinfo");
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println!("cargo:rustc-link-lib=pthread");
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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("netbsd") {
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println!("cargo:rustc-link-lib=pthread");
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println!("cargo:rustc-link-lib=rt");
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} else if target.contains("dragonfly") || target.contains("openbsd") {
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println!("cargo:rustc-link-lib=pthread");
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} else if target.contains("solaris") {
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println!("cargo:rustc-link-lib=socket");
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println!("cargo:rustc-link-lib=posix4");
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println!("cargo:rustc-link-lib=pthread");
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println!("cargo:rustc-link-lib=resolv");
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} else if target.contains("illumos") {
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println!("cargo:rustc-link-lib=socket");
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println!("cargo:rustc-link-lib=posix4");
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println!("cargo:rustc-link-lib=pthread");
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println!("cargo:rustc-link-lib=resolv");
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println!("cargo:rustc-link-lib=nsl");
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// Use libumem for the (malloc-compatible) allocator
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println!("cargo:rustc-link-lib=umem");
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} else if target.contains("apple-darwin") {
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println!("cargo:rustc-link-lib=System");
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// res_init and friends require -lresolv on macOS/iOS.
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// See #41582 and http://blog.achernya.com/2013/03/os-x-has-silly-libsystem.html
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println!("cargo:rustc-link-lib=resolv");
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} else if target.contains("apple-ios") {
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println!("cargo:rustc-link-lib=System");
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println!("cargo:rustc-link-lib=objc");
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println!("cargo:rustc-link-lib=framework=Security");
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println!("cargo:rustc-link-lib=framework=Foundation");
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println!("cargo:rustc-link-lib=resolv");
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} else if target.contains("uwp") {
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println!("cargo:rustc-link-lib=ws2_32");
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// For BCryptGenRandom
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println!("cargo:rustc-link-lib=bcrypt");
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} else if target.contains("windows") {
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println!("cargo:rustc-link-lib=advapi32");
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println!("cargo:rustc-link-lib=ws2_32");
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println!("cargo:rustc-link-lib=userenv");
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} else if target.contains("fuchsia") {
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println!("cargo:rustc-link-lib=zircon");
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println!("cargo:rustc-link-lib=fdio");
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} else if target.contains("cloudabi") {
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if cfg!(feature = "backtrace") {
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println!("cargo:rustc-link-lib=unwind");
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}
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println!("cargo:rustc-link-lib=c");
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println!("cargo:rustc-link-lib=compiler_rt");
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} else if (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("asmjs")
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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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