wip: port some old std work

Author: lewisfm

library/Cargo.lock

@@ -327,6 +327,7 @@ dependencies = [
  "rustc-demangle",
  "std_detect",
  "unwind",
+ "vex-sdk",
  "wasi",
  "windows-targets 0.0.0",
 ]
@@ -389,6 +390,13 @@ dependencies = [
  "rustc-std-workspace-core",
 ]
 
+[[package]]
+name = "vex-sdk"
+version = "0.27.0"
+dependencies = [
+ "rustc-std-workspace-core",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"

library/Cargo.toml

@@ -59,3 +59,5 @@ rustflags = ["-Cpanic=abort"]
 rustc-std-workspace-core = { path = 'rustc-std-workspace-core' }
 rustc-std-workspace-alloc = { path = 'rustc-std-workspace-alloc' }
 rustc-std-workspace-std = { path = 'rustc-std-workspace-std' }
+
+vex-sdk = { path = "../../vex-sdk/packages/vex-sdk" }

library/std/Cargo.toml

@@ -84,6 +84,11 @@ wasi = { version = "0.11.0", features = [
 r-efi = { version = "5.2.0", features = ['rustc-dep-of-std'] }
 r-efi-alloc = { version = "2.0.0", features = ['rustc-dep-of-std'] }
 
+[target.'cfg(target_os = "vexos")'.dependencies]
+vex-sdk = { version = "0.27.0", features = [
+    'rustc-dep-of-std',
+], default-features = false }
+
 [features]
 backtrace = [
     'addr2line/rustc-dep-of-std',

library/std/build.rs

@@ -52,6 +52,7 @@ fn main() {
         || target_os == "rtems"
         || target_os == "nuttx"
         || target_os == "cygwin"
+        || target_os == "vexos"
 
         // See src/bootstrap/src/core/build_steps/synthetic_targets.rs
         || env::var("RUSTC_BOOTSTRAP_SYNTHETIC_TARGET").is_ok()

library/std/src/env.rs

@@ -1098,6 +1098,7 @@ pub mod consts {
     /// * `"redox"`
     /// * `"solaris"`
     /// * `"solid_asp3`
+    /// * `"vexos"`
     /// * `"vita"`
     /// * `"vxworks"`
     /// * `"xous"`
@@ -1148,6 +1149,7 @@ pub mod consts {
     ///
     /// <details><summary>Full list of possible values</summary>
     ///
+    /// * `"bin"`
     /// * `"exe"`
     /// * `"efi"`
     /// * `"js"`

library/std/src/sys/env_consts.rs

@@ -323,6 +323,17 @@ pub mod os {
     pub const EXE_EXTENSION: &str = "efi";
 }
 
+#[cfg(target_os = "vexos")]
+pub mod os {
+    pub const FAMILY: &str = "";
+    pub const OS: &str = "vexos";
+    pub const DLL_PREFIX: &str = "";
+    pub const DLL_SUFFIX: &str = "";
+    pub const DLL_EXTENSION: &str = "";
+    pub const EXE_SUFFIX: &str = ".bin";
+    pub const EXE_EXTENSION: &str = "bin";
+}
+
 #[cfg(target_os = "visionos")]
 pub mod os {
     pub const FAMILY: &str = "unix";

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

@@ -45,6 +45,10 @@ cfg_select! {
         mod trusty;
         pub use self::trusty::*;
     }
+    target_os = "vexos" => {
+        mod vexos;
+        pub use self::vexos::*;
+    }
     all(target_os = "wasi", target_env = "p2") => {
         mod wasip2;
         pub use self::wasip2::*;