Support random file of AIX

src/lib.rs

@@ -209,7 +209,7 @@ pub use crate::error::Error;
 // The function MUST NOT ever write uninitialized bytes into `dest`,
 // regardless of what value it returns.
 cfg_if! {
-    if #[cfg(any(target_os = "haiku", target_os = "redox"))] {
+    if #[cfg(any(target_os = "haiku", target_os = "redox", target_os = "aix"))] {
         mod util_libc;
         #[path = "use_file.rs"] mod imp;
     } else if #[cfg(any(target_os = "android", target_os = "linux"))] {

src/use_file.rs

@@ -25,6 +25,7 @@ use core::{
 #[cfg(any(target_os = "solaris", target_os = "illumos"))]
 const FILE_PATH: &str = "/dev/random\0";
 #[cfg(any(
+    target_os = "aix",
     target_os = "android",
     target_os = "linux",
     target_os = "redox",

src/util_libc.rs

@@ -32,6 +32,8 @@ cfg_if! {
             fn __errno() -> *mut libc::c_int;
         }
         use __errno as errno_location;
+    } else if #[cfg(target_os = "aix")] {
+        use libc::_Errno as errno_location;
     }
 }