Add illumos OS tag

- Adds `illumos` to the `Target.Os.Tag` enum. A new function,
  `isSolarish` has been added that returns true if the tag is either
  Solaris or Illumos. This matches the naming convention found in Rust's
  `libc` crate[1].
- Add the tag wherever `.solaris` is being checked against.
- Check for the C pre-processor macro `__illumos__` in CMake to set the
  proper target tuple. Illumos distros patch their compilers to have
  this in the "built-in" set (verified with `echo | cc -dM -E -`).

  Alternatively you could check the output of `uname -o`.

Right now, both Solaris and Illumos import from `c/solaris.zig`. In the
future it may be worth putting the shared ABI bits in a base file, and
mixing that in with specific `c/solaris.zig`/`c/illumos.zig` files.

[1]: https://github.com/rust-lang/libc/tree/6e02a329a2a27f6887ea86952f389ca11e06448c/src/unix/solarish

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
index 74f8e98df4..5ede51022d 100644
--- a/lib/std/Thread.zig
+++ b/lib/std/Thread.zig
@@ -43,7 +43,7 @@ pub const max_name_len = switch (target.os.tag) {
     .freebsd => 15,
     .openbsd => 23,
     .dragonfly => 1023,
-    .solaris => 31,
+    .solaris, .illumos => 31,
     else => 0,
 };
 
@@ -123,7 +123,7 @@ pub fn setName(self: Thread, name: []const u8) SetNameError!void {
                 else => |e| return os.unexpectedErrno(e),
             }
         },
-        .netbsd, .solaris => if (use_pthreads) {
+        .netbsd, .solaris, .illumos => if (use_pthreads) {
             const err = std.c.pthread_setname_np(self.getHandle(), name_with_terminator.ptr, null);
             switch (err) {
                 .SUCCESS => return,
@@ -229,7 +229,7 @@ pub fn getName(self: Thread, buffer_ptr: *[max_name_len:0]u8) GetNameError!?[]co
                 else => |e| return os.unexpectedErrno(e),
             }
         },
-        .netbsd, .solaris => if (use_pthreads) {
+        .netbsd, .solaris, .illumos => if (use_pthreads) {
             const err = std.c.pthread_getname_np(self.getHandle(), buffer.ptr, max_name_len + 1);
             switch (err) {
                 .SUCCESS => return std.mem.sliceTo(buffer, 0),
@@ -636,7 +636,7 @@ const PosixThreadImpl = struct {
                 };
                 return @as(usize, @intCast(count));
             },
-            .solaris => {
+            .solaris, .illumos => {
                 // The "proper" way to get the cpu count would be to query
                 // /dev/kstat via ioctls, and traverse a linked list for each
                 // cpu.