From 2b219edb900e61b3cf147cf97d5b9878cb385e0e Mon Sep 17 00:00:00 2001
From: Patrick Balestra <patrickb@spotify.com>
Date: Wed, 20 Oct 2021 00:29:15 +0200
Subject: [PATCH] Apply patch from
 https://github.com/bazelbuild/bazel/pull/13870

---
 crosstool/BUILD.toolchains        |  4 ++++
 crosstool/cc_toolchain_config.bzl | 12 +++++++++++-
 crosstool/osx_archs.bzl           |  1 +
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/crosstool/BUILD.toolchains b/crosstool/BUILD.toolchains
index 0e9e321da9..b8021bed31 100644
--- a/crosstool/BUILD.toolchains
+++ b/crosstool/BUILD.toolchains
@@ -40,6 +40,10 @@ OSX_TOOLS_CONSTRAINTS = {
         "@platforms//os:ios",
         "@platforms//cpu:x86_64",
     ],
+    "ios_sim_arm64": [
+        "@platforms//os:ios",
+        "@platforms//cpu:aarch64",
+    ],
     "tvos_arm64": [
         "@platforms//os:ios",
         "@platforms//cpu:aarch64",
diff --git a/crosstool/cc_toolchain_config.bzl b/crosstool/cc_toolchain_config.bzl
index f3249bf8f0..86c74d6958 100644
--- a/crosstool/cc_toolchain_config.bzl
+++ b/crosstool/cc_toolchain_config.bzl
@@ -73,6 +73,8 @@ def _impl(ctx):
         target_system_name = "i386-apple-watchos"
     elif (ctx.attr.cpu == "ios_x86_64"):
         target_system_name = "x86_64-apple-ios"
+    elif (ctx.attr.cpu == "ios_sim_arm64"):
+        target_system_name = "arm64-apple-ios-simulator"
     elif (ctx.attr.cpu == "darwin_x86_64"):
         target_system_name = "x86_64-apple-macosx"
     elif (ctx.attr.cpu == "darwin_arm64"):
@@ -100,6 +102,8 @@ def _impl(ctx):
 
     host_system_name = "x86_64-apple-macosx"
     arch = ctx.attr.cpu.split("_", 1)[-1]
+    if ctx.attr.cpu == "ios_sim_arm64":
+        arch = "arm64"
 
     all_compile_actions = [
         ACTION_NAMES.c_compile,
@@ -735,6 +739,7 @@ def _impl(ctx):
         ctx.attr.cpu == "ios_armv7" or
         ctx.attr.cpu == "ios_i386" or
         ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64" or
         ctx.attr.cpu == "watchos_arm64_32" or
         ctx.attr.cpu == "watchos_armv7k" or
         ctx.attr.cpu == "watchos_i386" or
@@ -919,6 +924,7 @@ def _impl(ctx):
 
     if (ctx.attr.cpu == "ios_i386" or
         ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64" or
         ctx.attr.cpu == "tvos_x86_64" or
         ctx.attr.cpu == "watchos_i386" or
         ctx.attr.cpu == "watchos_x86_64"):
@@ -987,6 +993,7 @@ def _impl(ctx):
         ctx.attr.cpu == "ios_armv7" or
         ctx.attr.cpu == "ios_i386" or
         ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64" or
         ctx.attr.cpu == "tvos_arm64" or
         ctx.attr.cpu == "tvos_x86_64" or
         ctx.attr.cpu == "watchos_arm64_32" or
@@ -1220,7 +1227,8 @@ def _impl(ctx):
     )
 
     if (ctx.attr.cpu == "ios_i386" or
-        ctx.attr.cpu == "ios_x86_64"):
+        ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64"):
         version_min_feature = feature(
             name = "version_min",
             flag_sets = [
@@ -1747,6 +1755,7 @@ def _impl(ctx):
         ctx.attr.cpu == "ios_armv7" or
         ctx.attr.cpu == "ios_i386" or
         ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64" or
         ctx.attr.cpu == "tvos_arm64" or
         ctx.attr.cpu == "tvos_x86_64" or
         ctx.attr.cpu == "watchos_arm64_32" or
@@ -2830,6 +2839,7 @@ def _impl(ctx):
         ctx.attr.cpu == "ios_armv7" or
         ctx.attr.cpu == "ios_i386" or
         ctx.attr.cpu == "ios_x86_64" or
+        ctx.attr.cpu == "ios_sim_arm64" or
         ctx.attr.cpu == "tvos_arm64" or
         ctx.attr.cpu == "tvos_x86_64" or
         ctx.attr.cpu == "watchos_arm64_32" or
diff --git a/crosstool/osx_archs.bzl b/crosstool/osx_archs.bzl
index b44f094293..128c6eb513 100644
--- a/crosstool/osx_archs.bzl
+++ b/crosstool/osx_archs.bzl
@@ -20,6 +20,7 @@ OSX_TOOLS_NON_DEVICE_ARCHS = [
     "darwin_arm64e",
     "ios_i386",
     "ios_x86_64",
+    "ios_sim_arm64",
     "watchos_i386",
     "watchos_x86_64",
     "tvos_x86_64",