Cleaner c_char cfg logic

src/libstd/ffi/c_str.rs

@@ -37,11 +37,10 @@
 ///
 /// A `CString` is created from either a byte slice or a byte vector. After
 /// being created, a `CString` predominately inherits all of its methods from
-/// the `Deref` implementation to `[os::raw::c_char]`. Note that the underlying
-/// array is represented as an array of `os::raw::c_char` as opposed to `u8`. A
-/// `u8` slice can be obtained with the `as_bytes` method.  Slices produced from
-/// a `CString` do *not* contain the trailing nul terminator unless otherwise
-/// specified.
+/// the `Deref` implementation to `[c_char]`. Note that the underlying array
+/// is represented as an array of `c_char` as opposed to `u8`. A `u8` slice
+/// can be obtained with the `as_bytes` method.  Slices produced from a `CString`
+/// do *not* contain the trailing nul terminator unless otherwise specified.
 ///
 /// # Examples
 ///

src/libstd/os/raw.rs

@@ -12,13 +12,13 @@
 
 #![stable(feature = "raw_os", since = "1.1.0")]
 
-#[cfg(all(not(target_os = "ios"), not(target_os = "macos"),
-          any(target_arch = "aarch64", target_arch = "arm",
-              target_os = "android")))]
+#[cfg(any(target_os = "android",
+          all(target_os = "linux", any(target_arch = "aarch64",
+                                       target_arch = "arm"))))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = u8;
-#[cfg(any(target_os = "ios", target_os = "macos",
-          not(any(target_arch = "aarch64", target_arch = "arm",
-                  target_os = "android"))))]
+#[cfg(not(any(target_os = "android",
+              all(target_os = "linux", any(target_arch = "aarch64",
+                                           target_arch = "arm")))))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = i8;
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_schar = i8;
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_uchar = u8;