Move stdout/err flush into sys

src/libstd/io/stdio.rs

@@ -81,16 +81,10 @@ impl Read for StdinRaw {
 }
 impl Write for StdoutRaw {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
-    #[cfg(not(target_os = "redox"))]
-    fn flush(&mut self) -> io::Result<()> { Ok(()) }
-    #[cfg(target_os = "redox")]
     fn flush(&mut self) -> io::Result<()> { self.0.flush() }
 }
 impl Write for StderrRaw {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
-    #[cfg(not(target_os = "redox"))]
-    fn flush(&mut self) -> io::Result<()> { Ok(()) }
-    #[cfg(target_os = "redox")]
     fn flush(&mut self) -> io::Result<()> { self.0.flush() }
 }
 

src/libstd/sys/redox/stdio.rs

@@ -73,7 +73,7 @@ impl io::Write for Stderr {
     }
 
     fn flush(&mut self) -> io::Result<()> {
-        cvt(syscall::fsync(2)).and(Ok(()))
+        Stderr::flush(self)
     }
 }
 

src/libstd/sys/unix/stdio.rs

@@ -43,6 +43,10 @@ impl Stdout {
         fd.into_raw();
         ret
     }
+
+    pub fn flush(&self) -> io::Result<()> {
+        Ok(())
+    }
 }
 
 impl Stderr {
@@ -54,6 +58,10 @@ impl Stderr {
         fd.into_raw();
         ret
     }
+
+    pub fn flush(&self) -> io::Result<()> {
+        Ok(())
+    }
 }
 
 // FIXME: right now this raw stderr handle is used in a few places because
@@ -63,7 +71,10 @@ impl io::Write for Stderr {
     fn write(&mut self, data: &[u8]) -> io::Result<usize> {
         Stderr::write(self, data)
     }
-    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+    
+    fn flush(&mut self) -> io::Result<()> {
+        Stderr::flush(self)
+    }
 }
 
 pub const EBADF_ERR: i32 = ::libc::EBADF as i32;

src/libstd/sys/windows/stdio.rs

@@ -156,6 +156,10 @@ impl Stdout {
     pub fn write(&self, data: &[u8]) -> io::Result<usize> {
         write(&self.0, data)
     }
+
+    pub fn flush(&self) -> io::Result<()> {
+        Ok(())
+    }
 }
 
 impl Stderr {
@@ -166,6 +170,10 @@ impl Stderr {
     pub fn write(&self, data: &[u8]) -> io::Result<usize> {
         write(&self.0, data)
     }
+
+    pub fn flush(&self) -> io::Result<()> {
+        Ok(())
+    }
 }
 
 // FIXME: right now this raw stderr handle is used in a few places because
@@ -175,7 +183,10 @@ impl io::Write for Stderr {
     fn write(&mut self, data: &[u8]) -> io::Result<usize> {
         Stderr::write(self, data)
     }
-    fn flush(&mut self) -> io::Result<()> { Ok(()) }
+    
+    fn flush(&mut self) -> io::Result<()> {
+        Stderr::flush(self)
+    }
 }
 
 impl NoClose {