From df1619b815208e51de1c3ccc3dee1eae4214fb1d Mon Sep 17 00:00:00 2001
From: Eric Miotto <1094986+edymtt@users.noreply.github.com>
Date: Wed, 31 Jan 2024 08:37:47 -0800
Subject: [PATCH] CMake: run `generate_xcode.txt` only for the host platform

Currently the test assumes that when we are testing for macOS we are
targeting the host architecture (since we need to reuse existing build
products to contain the test time) -- however there are some Apple
internal configuration in which that's not the case.

Addresses rdar://118337598
---
 test/lit.cfg                                    | 11 +++++++++--
 validation-test/BuildSystem/generate_xcode.test |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/test/lit.cfg b/test/lit.cfg
index 2543db274b6da..5d4467f14d5c5 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -399,6 +399,15 @@ if run_vers.endswith('-simulator'):
 else:
     run_environment=''
 
+# Parse the host triple
+(host_cpu, host_vendor, host_os, host_vers) = re.match('([^-]+)-([^-]+)-([^0-9-]+)(.*)', config.host_triple).groups()
+
+if f"{host_cpu}-{host_vendor}-{host_os}" == f"{run_cpu}-{run_vendor}-{run_os}":
+    # Ignore the version on purpose, to account for scenario
+    # in which the compiler has a different deployment target
+    # than the standard library
+    config.available_features.add('target-same-as-host')
+
 target_arch = run_cpu
 if run_os == 'openbsd' and run_cpu == 'amd64':
    target_arch = run_cpu
@@ -581,8 +590,6 @@ else:
             config.swift_driver_test_options,
         )
     )
-    # Parse the host triple.
-    (host_cpu, host_vendor, host_os, host_vers) = re.match('([^-]+)-([^-]+)-([^0-9-]+)(.*)', config.host_triple).groups()
     toolchain_lib_dir = make_path(config.swift_lib_dir, 'swift', host_os)
     config.host_build_swift = (
         "%s -target %s -g %s -I %s -L %s %s" % (
diff --git a/validation-test/BuildSystem/generate_xcode.test b/validation-test/BuildSystem/generate_xcode.test
index d1192a18430ff..ab234a60356a9 100644
--- a/validation-test/BuildSystem/generate_xcode.test
+++ b/validation-test/BuildSystem/generate_xcode.test
@@ -15,3 +15,4 @@
 
 # REQUIRES: standalone_build
 # REQUIRES: OS=macosx
+# REQUIRES: target-same-as-host