Only expose ppoll on non-BSD targets

src/unix/mod.rs

@@ -721,12 +721,6 @@ extern {
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "poll$UNIX2003")]
     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
-    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
-               link_name = "ppoll$UNIX2003")]
-    pub fn ppoll(fds: *mut pollfd,
-                 nfds: nfds_t,
-                 timeout: *const timespec,
-                 sigmask: *const sigset_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
                link_name = "select$1050")]
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),

src/unix/notbsd/mod.rs

 use dox::mem;
+use ::{pollfd, timespec};
 
 pub type sa_family_t = u16;
 pub type pthread_key_t = ::c_uint;
@@ -841,6 +842,10 @@ extern {
                      linkpath: *const ::c_char) -> ::c_int;
     pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char,
                     flags: ::c_int) -> ::c_int;
+    pub fn ppoll(fds: *mut pollfd,
+                 nfds: nfds_t,
+                 timeout: *const timespec,
+                 sigmask: *const sigset_t) -> ::c_int;
     pub fn pthread_condattr_getclock(attr: *const pthread_condattr_t,
                                      clock_id: *mut clockid_t) -> ::c_int;
     pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,