Auto merge of #851 - mneumann:dragonfly-several-fixes, r=alexcrichton

Several fixes for DragonFly

With these changes in place, crate "nix" works (with some patches applied).

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -174,6 +174,7 @@ pub const RAND_MAX: ::c_int = 0x7fff_ffff;
 pub const PTHREAD_STACK_MIN: ::size_t = 16384;
 pub const SIGSTKSZ: ::size_t = 40960;
 pub const MADV_INVAL: ::c_int = 10;
+pub const MADV_SETMAP: ::c_int = 11;
 pub const O_CLOEXEC: ::c_int = 0x00020000;
 pub const O_DIRECTORY: ::c_int = 0x08000000;
 pub const F_GETLK: ::c_int = 7;
@@ -713,6 +714,9 @@ pub const _SC_V7_LPBIG_OFFBIG: ::c_int = 125;
 pub const _SC_THREAD_ROBUST_PRIO_INHERIT: ::c_int = 126;
 pub const _SC_THREAD_ROBUST_PRIO_PROTECT: ::c_int = 127;
 
+pub const WCONTINUED: ::c_int = 4;
+pub const WSTOPPED: ::c_int = 0o177;
+
 extern {
     pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -861,6 +861,9 @@ extern {
     pub fn msgsnd(msqid: ::c_int, msgp: *const ::c_void, msgsz: ::size_t,
         msgflg: ::c_int) -> ::c_int;
     pub fn cfmakesane(termios: *mut ::termios);
+    pub fn fexecve(fd: ::c_int, argv: *const *const ::c_char,
+                   envp: *const *const ::c_char)
+                   -> ::c_int;
 }
 
 cfg_if! {

src/unix/bsd/freebsdlike/mod.rs

@@ -1105,9 +1105,6 @@ extern {
                  timeout: *const ::timespec,
                  sigmask: *const sigset_t) -> ::c_int;
     pub fn settimeofday(tv: *const ::timeval, tz: *const ::timezone) -> ::c_int;
-    pub fn fexecve(fd: ::c_int, argv: *const *const ::c_char,
-                   envp: *const *const ::c_char)
-                   -> ::c_int;
 }
 
 cfg_if! {