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Add support for i586-unknown-netbsd as target.

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This restricts instructions to those offered by Pentium,
to support e.g. AMD Geode.

There is already an entry for this target in the NetBSD
platform support page at

  src/doc/rustc/src/platform-support/netbsd.md

...so this should forestall its removal.

Additional fixes are needed for some vendored modules, this
is the changes in the rust compiler core itself.
This commit is contained in:
Havard Eidnes 2023-10-25 15:23:34 +00:00
parent eb03d40a9c
commit 6642b4b1e2
3 changed files with 29 additions and 0 deletions
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6
compiler/rustc_llvm/build.rs
View File

@ -258,6 +258,12 @@ fn main() {
{
println!("cargo:rustc-link-lib=z");
} else if target.contains("netbsd") {
// Building for i586 or i686, we need -latomic for 64-bit atomics
if target.starts_with("i586")
|| target.starts_with("i686")
{
println!("cargo:rustc-link-lib=atomic");
}
println!("cargo:rustc-link-lib=z");
println!("cargo:rustc-link-lib=execinfo");
}

22
compiler/rustc_target/src/spec/i586_unknown_netbsd.rs Normal file
View File

@ -0,0 +1,22 @@
use crate::spec::{Cc, Lld, LinkerFlavor, StackProbeType, Target, TargetOptions};
pub fn target() -> Target {
let mut base = super::netbsd_base::opts();
base.cpu = "pentium".into();
base.max_atomic_width = Some(64);
base.pre_link_args
.entry(LinkerFlavor::Gnu(Cc::Yes, Lld::No))
.or_default()
.push("-m32".into());
base.stack_probes = StackProbeType::Call;
Target {
llvm_target: "i586-unknown-netbsdelf".into(),
pointer_width: 32,
data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
f64:32:64-f80:32-n8:16:32-S128"
.into(),
arch: "x86".into(),
options: TargetOptions { mcount: "__mcount".into(), ..base },
}
}

1
compiler/rustc_target/src/spec/mod.rs
View File

@ -1426,6 +1426,7 @@ fn $module() {
("aarch64_be-unknown-netbsd", aarch64_be_unknown_netbsd),
("armv6-unknown-netbsd-eabihf", armv6_unknown_netbsd_eabihf),
("armv7-unknown-netbsd-eabihf", armv7_unknown_netbsd_eabihf),
("i586-unknown-netbsd", i586_unknown_netbsd),
("i686-unknown-netbsd", i686_unknown_netbsd),
("powerpc-unknown-netbsd", powerpc_unknown_netbsd),
("riscv64gc-unknown-netbsd", riscv64gc_unknown_netbsd),