From ba032f8c983ec2a10d3ddfa31f0007b2b7b704a6 Mon Sep 17 00:00:00 2001
From: Tony Aiuto <aiuto@google.com>
Date: Mon, 26 Jun 2023 10:58:38 -0400
Subject: [PATCH] Add Apple visionos.

I'm not really satisified with this PR. The number of Apple specific platforms has grown to the point where we may want to refactor them. The question I would focus on is how various toolchain matches and select clauses go.

Do we see things like:

```
foo = select({
  ".../os:linux": A,
  ".../os:windows": B,
  ".../os:macos": C,
  ".../os:watchos": C,
  ".../os:visionos": C,
})
```

Where C is the same for all the apple platforms?

Or, do we see real distinctions across the various per-device OSes. Or a mix of both?
And, do we see the fanout of the Apple OSes done with a select_or wrapper, so users end up seeing the simple selection of just apple, linux, or windows, but we buried complexity elsewhere?
---
 os/BUILD | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/os/BUILD b/os/BUILD
index e0484ee..1d9fedb 100644
--- a/os/BUILD
+++ b/os/BUILD
@@ -82,6 +82,11 @@ constraint_value(
     constraint_setting = ":os",
 )
 
+constraint_value(
+    name = "visionos",
+    constraint_setting = ":os",
+)
+
 constraint_value(
     name = "qnx",
     constraint_setting = ":os",