More changes to support my OS

compiler/rustc_target/src/spec/base/mod.rs

@@ -21,6 +21,7 @@ pub(crate) mod msvc;
 pub(crate) mod netbsd;
 pub(crate) mod nto_qnx;
 pub(crate) mod openbsd;
+pub(crate) mod os;
 pub(crate) mod redox;
 pub(crate) mod solaris;
 pub(crate) mod solid;

compiler/rustc_target/src/spec/base/os.rs

@@ -0,0 +1,11 @@
+use crate::spec::{PanicStrategy, RelocModel, TargetOptions, crt_objects};
+
+pub(crate) fn opts() -> TargetOptions {
+    TargetOptions {
+        os: "os".into(),
+        relocation_model: RelocModel::Static,
+        panic_strategy: PanicStrategy::Abort,
+        pre_link_objects: crt_objects::pre_os(),
+        ..Default::default()
+    }
+}

compiler/rustc_target/src/spec/crt_objects.rs

@@ -122,3 +122,7 @@ pub(super) fn pre_wasi_self_contained() -> CrtObjects {
 pub(super) fn post_wasi_self_contained() -> CrtObjects {
     new(&[])
 }
+
+pub(super) fn pre_os() -> CrtObjects {
+    all("crt0.o")
+}

compiler/rustc_target/src/spec/mod.rs

@@ -1946,6 +1946,7 @@ supported_targets! {
     ("riscv32imafc-unknown-nuttx-elf", riscv32imafc_unknown_nuttx_elf),
     ("riscv64imac-unknown-nuttx-elf", riscv64imac_unknown_nuttx_elf),
     ("riscv64gc-unknown-nuttx-elf", riscv64gc_unknown_nuttx_elf),
+    ("x86_64-unknown-os", x86_64_unknown_os),
 
 }
 

compiler/rustc_target/src/spec/targets/x86_64_unknown_os.rs

@@ -0,0 +1,20 @@
+use crate::spec::{Target, TargetMetadata, base};
+
+pub(crate) fn target() -> Target {
+    let mut base = base::os::opts();
+    base.cpu = "x86-64".into();
+    Target {
+        llvm_target: "x86_64-unknown-none".into(),
+        metadata: TargetMetadata {
+            description: None,
+            tier: None,
+            host_tools: Some(false),
+            std: Some(true),
+        },
+        pointer_width: 64,
+        arch: "x86_64".into(),
+        data_layout:
+            "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
+        options: base,
+    }
+}

library/std/Cargo.toml

@@ -151,5 +151,5 @@ check-cfg = [
     # of declared features, we therefor expect any feature cfg
     'cfg(feature, values(any()))',
     # #[cfg(bootstrap)] rtems
-    'cfg(target_os, values("rtems"))',
+    'cfg(target_os, values("rtems", "os"))',
 ]

library/std/build.rs

@@ -56,6 +56,7 @@ fn main() {
         || target_os == "zkvm"
         || target_os == "rtems"
         || target_os == "nuttx"
+        || target_os == "os"
 
         // See src/bootstrap/src/core/build_steps/synthetic_targets.rs
         || env::var("RUSTC_BOOTSTRAP_SYNTHETIC_TARGET").is_ok()

library/std/src/sys/pal/mod.rs

@@ -61,6 +61,9 @@ cfg_if::cfg_if! {
     } else if #[cfg(target_os = "zkvm")] {
         mod zkvm;
         pub use self::zkvm::*;
+    } else if #[cfg(target_os = "os")] {
+        mod osstd;
+        pub use self::osstd::*;
     } else {
         mod unsupported;
         pub use self::unsupported::*;

library/std/src/sys/thread_local/mod.rs

@@ -28,6 +28,7 @@ cfg_if::cfg_if! {
         all(target_family = "wasm", not(target_feature = "atomics")),
         target_os = "uefi",
         target_os = "zkvm",
+        target_os = "os",
     ))] {
         mod statik;
         pub use statik::{EagerStorage, LazyStorage, thread_local_inner};