Fix poll API for MacOS and BSD

Signed-off-by: David Henningsson <diwic@ubuntu.com>

Author: diwic

src/unix/bsd/mod.rs

@@ -6,6 +6,7 @@ pub type blkcnt_t = i64;
 pub type socklen_t = u32;
 pub type sa_family_t = u8;
 pub type pthread_t = ::uintptr_t;
+pub type nfds_t = ::c_uint;
 
 s! {
     pub struct sockaddr {

src/unix/mod.rs

@@ -10,7 +10,6 @@ pub type in_addr_t = u32;
 pub type in_port_t = u16;
 pub type sighandler_t = ::size_t;
 pub type cc_t = ::c_uchar;
-pub type nfds_t = ::c_ulong;
 
 pub enum DIR {}
 
@@ -562,6 +561,8 @@ extern {
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "recvmsg$UNIX2003")]
     pub fn recvmsg(fd: ::c_int, msg: *mut msghdr, flags: ::c_int) -> ::ssize_t;
+    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
+               link_name = "poll$UNIX2003")]
     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
 }
 

src/unix/notbsd/android/mod.rs

@@ -22,6 +22,7 @@ pub type sigset_t = c_ulong;
 pub type time64_t = i64;
 pub type fsfilcnt_t = ::c_ulong;
 pub type fsblkcnt_t = ::c_ulong;
+pub type nfds_t = ::c_uint;
 
 s! {
     pub struct stat {

src/unix/notbsd/linux/mod.rs

@@ -14,6 +14,7 @@ pub type fsfilcnt_t = ::c_ulong;
 pub type key_t = ::c_int;
 pub type shmatt_t = ::c_ulong;
 pub type mqd_t = ::c_int;
+pub type nfds_t = ::c_ulong;
 
 pub enum fpos64_t {} // TODO: fill this out with a struct