Fix warnings when compiling stdlib with --test

src/libstd/sys/unix/mod.rs

@@ -45,7 +45,7 @@ pub mod thread_local;
 pub mod time;
 pub mod stdio;
 
-#[cfg(not(target_os = "nacl"))]
+#[cfg(not(any(target_os = "nacl", test)))]
 pub fn init() {
     use libc::signal;
     // By default, some platforms will send a *signal* when an EPIPE error
@@ -59,7 +59,8 @@ pub fn init() {
         assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != !0);
     }
 }
-#[cfg(target_os = "nacl")]
+
+#[cfg(all(target_os = "nacl", not(test)))]
 pub fn init() { }
 
 pub fn decode_error_kind(errno: i32) -> ErrorKind {

src/libstd/sys/unix/process.rs

@@ -462,8 +462,7 @@ mod tests {
     use mem;
     use ptr;
     use libc;
-    use slice;
-    use sys::{self, cvt, pipe};
+    use sys::{self, cvt};
 
     macro_rules! t {
         ($e:expr) => {
@@ -482,6 +481,8 @@ mod tests {
 
     #[cfg(target_os = "android")]
     unsafe fn sigaddset(set: *mut libc::sigset_t, signum: libc::c_int) -> libc::c_int {
+        use slice;
+
         let raw = slice::from_raw_parts_mut(set as *mut u8, mem::size_of::<libc::sigset_t>());
         let bit = (signum - 1) as usize;
         raw[bit / 8] |= 1 << (bit % 8);

src/libstd/sys/unix/stack_overflow.rs

@@ -7,11 +7,13 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
+#![cfg_attr(test, allow(dead_code))]
 
 use libc;
 use self::imp::{make_handler, drop_handler};
 
-pub use self::imp::{init, cleanup};
+pub use self::imp::cleanup;
+pub use self::imp::init;
 
 pub struct Handler {
     _data: *mut libc::c_void
@@ -40,12 +42,11 @@ impl Drop for Handler {
           target_os = "openbsd"))]
 mod imp {
     use super::Handler;
-    use sys_common::util::report_overflow;
     use mem;
     use ptr;
+    use libc::{sigaltstack, SIGSTKSZ};
     use libc::{sigaction, SIGBUS, SIG_DFL,
-               SA_SIGINFO, SA_ONSTACK, sigaltstack,
-               SIGSTKSZ, sighandler_t};
+               SA_SIGINFO, SA_ONSTACK, sighandler_t};
     use libc;
     use libc::{mmap, munmap};
     use libc::{SIGSEGV, PROT_READ, PROT_WRITE, MAP_PRIVATE, MAP_ANON};
@@ -94,6 +95,8 @@ mod imp {
     unsafe extern fn signal_handler(signum: libc::c_int,
                                     info: *mut libc::siginfo_t,
                                     _data: *mut libc::c_void) {
+        use sys_common::util::report_overflow;
+
         let guard = thread_info::stack_guard().unwrap_or(0);
         let addr = siginfo_si_addr(info) as usize;