Auto merge of #3310 - inferiorhumanorgans:solaris-no-flock, r=JohnTitor

Don't include flock support on Solaris

This should disable the flock wrapper and related consts on Solaris, but leave them in place for OpenSolaris derivatives like Illumos which do have a BSD-esque flock.

src/unix/mod.rs

@@ -1067,7 +1067,11 @@ extern "C" {
     )]
     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char) -> *mut ::c_char;
 
-    pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
+    cfg_if! {
+        if #[cfg(not(target_os = "solaris"))] {
+            pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
+        }
+    }
 
     #[cfg_attr(target_os = "netbsd", link_name = "__times13")]
     pub fn times(buf: *mut ::tms) -> ::clock_t;

src/unix/solarish/illumos.rs

@@ -33,6 +33,11 @@ pub const TCP_KEEPCNT: ::c_int = 35;
 pub const TCP_KEEPINTVL: ::c_int = 36;
 pub const TCP_CONGESTION: ::c_int = 37;
 
+pub const LOCK_SH: ::c_int = 1;
+pub const LOCK_EX: ::c_int = 2;
+pub const LOCK_NB: ::c_int = 4;
+pub const LOCK_UN: ::c_int = 8;
+
 // These constants are correct for 64-bit programs or 32-bit programs that are
 // not using large-file mode.  If Rust ever supports anything other than 64-bit
 // compilation on illumos, this may require adjustment:

src/unix/solarish/mod.rs

@@ -1917,11 +1917,6 @@ pub const SHUT_RD: ::c_int = 0;
 pub const SHUT_WR: ::c_int = 1;
 pub const SHUT_RDWR: ::c_int = 2;
 
-pub const LOCK_SH: ::c_int = 1;
-pub const LOCK_EX: ::c_int = 2;
-pub const LOCK_NB: ::c_int = 4;
-pub const LOCK_UN: ::c_int = 8;
-
 pub const F_RDLCK: ::c_short = 1;
 pub const F_WRLCK: ::c_short = 2;
 pub const F_UNLCK: ::c_short = 3;