Remove some actually unsupported termios iflags on redox

Author: coolreader18

CHANGELOG.md

@@ -13,6 +13,10 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Removed
 
+- Removed a couple of termios constants on redox that were never actually
+  supported.
+  (#[1483](https://github.com/nix-rust/nix/pull/1483))
+
 ## [0.20.0] - 20 February 2021
 ### Added
 

Cargo.toml

@@ -31,7 +31,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { version = "0.2.82", features = [ "extra_traits" ] }
+libc = { version = "0.2.99", features = [ "extra_traits" ] }
 bitflags = ">= 1.1.0, < 1.3.0"
 cfg-if = "1.0"
 

src/sys/termios.rs

@@ -569,7 +569,9 @@ libc_bitflags! {
         ICRNL;
         IXON;
         IXOFF;
+        #[cfg(not(target_os = "redox"))]
         IXANY;
+        #[cfg(not(target_os = "redox"))]
         IMAXBEL;
         #[cfg(any(target_os = "android", target_os = "linux", target_os = "macos"))]
         IUTF8;