Fix vxworks compilation errors

library/std/src/sys/unix/os.rs

@@ -85,11 +85,6 @@ pub fn errno() -> i32 {
     unsafe { libc::errnoGet() }
 }
 
-#[cfg(target_os = "vxworks")]
-pub fn set_errno(e: i32) {
-    unsafe { libc::errnoSet(e as c_int) };
-}
-
 #[cfg(target_os = "dragonfly")]
 pub fn errno() -> i32 {
     extern "C" {
@@ -642,7 +637,7 @@ pub fn getppid() -> u32 {
     unsafe { libc::getppid() as u32 }
 }
 
-#[cfg(target_env = "gnu")]
+#[cfg(all(target_env = "gnu", not(target_os = "vxworks")))]
 pub fn glibc_version() -> Option<(usize, usize)> {
     if let Some(Ok(version_str)) = glibc_version_cstr().map(CStr::to_str) {
         parse_glibc_version(version_str)
@@ -651,7 +646,7 @@ pub fn glibc_version() -> Option<(usize, usize)> {
     }
 }
 
-#[cfg(target_env = "gnu")]
+#[cfg(all(target_env = "gnu", not(target_os = "vxworks")))]
 fn glibc_version_cstr() -> Option<&'static CStr> {
     weak! {
         fn gnu_get_libc_version() -> *const libc::c_char
@@ -665,7 +660,7 @@ fn glibc_version_cstr() -> Option<&'static CStr> {
 
 // Returns Some((major, minor)) if the string is a valid "x.y" version,
 // ignoring any extra dot-separated parts. Otherwise return None.
-#[cfg(target_env = "gnu")]
+#[cfg(all(target_env = "gnu", not(target_os = "vxworks")))]
 fn parse_glibc_version(version: &str) -> Option<(usize, usize)> {
     let mut parsed_ints = version.split('.').map(str::parse::<usize>).fuse();
     match (parsed_ints.next(), parsed_ints.next()) {

library/std/src/sys/unix/process/process_common.rs

@@ -223,7 +223,7 @@ impl Command {
     pub fn get_groups(&self) -> Option<&[gid_t]> {
         self.groups.as_deref()
     }
-
+    #[allow(dead_code)]
     pub fn get_closures(&mut self) -> &mut Vec<Box<dyn FnMut() -> io::Result<()> + Send + Sync>> {
         &mut self.closures
     }

library/std/src/sys/unix/process/process_vxworks.rs

@@ -18,7 +18,7 @@ impl Command {
         needs_stdin: bool,
     ) -> io::Result<(Process, StdioPipes)> {
         use crate::sys::cvt_r;
-        const CLOEXEC_MSG_FOOTER: &'static [u8] = b"NOEX";
+        // const CLOEXEC_MSG_FOOTER: &'static [u8] = b"NOEX";
         let envp = self.capture_env();
 
         if self.saw_nul() {
@@ -196,6 +196,24 @@ impl ExitStatus {
     pub fn signal(&self) -> Option<i32> {
         if !self.exited() { Some(libc::WTERMSIG(self.0)) } else { None }
     }
+
+    pub fn core_dumped(&self) -> bool {
+        // This method is not yet properly implemented on VxWorks
+        false
+    }
+
+    pub fn stopped_signal(&self) -> Option<i32> {
+        if libc::WIFSTOPPED(self.0) { Some(libc::WSTOPSIG(self.0)) } else { None }
+    }
+
+    pub fn continued(&self) -> bool {
+        // This method is not yet properly implemented on VxWorks
+        false
+    }
+
+    pub fn into_raw(&self) -> c_int {
+        self.0
+    }
 }
 
 /// Converts a raw `c_int` to a type-safe `ExitStatus` by wrapping it without copying.