From 010309bff92dbcbbc0755e344f0647ffd3e36ee4 Mon Sep 17 00:00:00 2001
From: Brian Smith <brian@briansmith.org>
Date: Thu, 20 Jun 2024 13:38:11 -0700
Subject: [PATCH] Add *-apple-{visionos,watchos} support; CI: build
 tvOS,visionOS,watchOS.

---
 .github/workflows/ci.yml  | 26 +++++++++++++++++++++++++-
 Cargo.toml                |  3 +++
 mk/install-build-tools.sh |  9 ++++++++-
 src/rand.rs               |  2 ++
 4 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f7b30b0df..c4c814e8f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -164,8 +164,11 @@ jobs:
           - # Default
 
         target:
-          - aarch64-apple-ios
           - aarch64-apple-darwin
+          - aarch64-apple-ios
+          # - aarch64-apple-tvos      Tier 3; handled below
+          # - aarch64-apple-visionos  Tier 3; handled below
+          # - aarch64-apple-watchos   Tier 3; handled below
           - aarch64-linux-android
           - aarch64-pc-windows-msvc
           - aarch64-unknown-linux-gnu
@@ -205,6 +208,27 @@ jobs:
             # TODO: Run in the emulator.
             cargo_options: --no-run
 
+          - target: aarch64-apple-tvos
+            host_os: macos-14
+            rust_channel: nightly
+            mode: --release
+            # TODO: Run in the emulator.
+            cargo_options: --no-run -Z build-std
+
+          - target: aarch64-apple-visionos
+            host_os: macos-14
+            rust_channel: nightly
+            mode: --release
+            # TODO: Run in the emulator.
+            cargo_options: --no-run -Z build-std
+
+          - target: aarch64-apple-watchos
+            host_os: macos-14
+            rust_channel: nightly
+            mode: --release
+            # TODO: Run in the emulator.
+            cargo_options: --no-run -Z build-std
+
           - target: aarch64-linux-android
             host_os: ubuntu-22.04
             # TODO: https://github.com/briansmith/ring/issues/486
diff --git a/Cargo.toml b/Cargo.toml
index 0898ddd1af..ff07c26b8e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -176,6 +176,9 @@ libc = { version = "0.2.148", default-features = false }
 [build-dependencies]
 cc = { version = "1.0.83", default-features = false }
 
+[target.'cfg(any(target_os = "visionos"))'.build-dependencies]
+cc = { version = "1.0.94", default-features = false }
+
 [features]
 # These features are documented in the top-level module's documentation.
 default = ["alloc", "dev_urandom_fallback"]
diff --git a/mk/install-build-tools.sh b/mk/install-build-tools.sh
index 81fd9ed1ba..1018d3b8c0 100755
--- a/mk/install-build-tools.sh
+++ b/mk/install-build-tools.sh
@@ -68,6 +68,11 @@ case ${target-} in
 esac
 
 case ${target-} in
+aarch64-apple-tvos | aarch64-apple-tvos-sim | \
+aarch64-apple-visionos | aarch64-apple-visionos-sim | \
+aarch64-apple-watchos | aarch64-apple-watchos-sim)
+  build_std=1
+  ;;
 aarch64-unknown-linux-gnu)
   # Clang is needed for code coverage.
   use_clang=1
@@ -214,7 +219,9 @@ esac
 
 rustup toolchain install --no-self-update --profile=minimal ${toolchain}
 if [ -n "${target-}" ]; then
-  rustup target add --toolchain=${toolchain} ${target}
+  if [ -z "${build_std-}" ]; then
+    rustup target add --toolchain=${toolchain} ${target}
+  fi
 fi
 if [ -n "${RING_COVERAGE-}" ]; then
   rustup toolchain install --profile=minimal ${toolchain} --component llvm-tools-preview
diff --git a/src/rand.rs b/src/rand.rs
index 0d55635a00..683ee22fbe 100644
--- a/src/rand.rs
+++ b/src/rand.rs
@@ -140,6 +140,8 @@ impl crate::sealed::Sealed for SystemRandom {}
     target_os = "redox",
     target_os = "solaris",
     target_os = "tvos",
+    target_os = "visionos",
+    target_os = "watchos",
     target_os = "vita",
     target_os = "windows",
     all(