[interop] update import-foundation-with-indexing.swift to only run on SDK with fixed CF_OPTIONS

Author: hyp

test/Interop/Cxx/stdlib/import-foundation-with-indexing.swift

@@ -3,6 +3,7 @@
 // RUN: ls %t/v5/units | %FileCheck %s
 
 // REQUIRES: OS=macosx
+// REQUIRES: cxx-interop-fixed-cf_options
 
 import Foundation
 

test/Interop/lit.local.cfg

@@ -9,6 +9,22 @@ def get_target_os():
 clang_compile_opt = '-I' + config.swiftlib_dir + ' '
 clang_opt = clang_compile_opt
 
+is_cf_options_interop_updated = True
+
+if config.variant_sdk and config.variant_sdk != "":
+    # Check if CF_OPTIONS macro has been updated to be imported into Swift in C++ mode correctly.
+    cf_avail_path = os.path.join(config.variant_sdk, 'System', 'Library', 'Frameworks', 'CoreFoundation.framework', 'Versions', 'A', 'Headers', 'CFAvailability.h')
+    if os.path.exists(cf_avail_path):
+        with open(cf_avail_path, 'r') as file:
+            contents = file.read()
+            import re
+            regex = r'^#define CF_OPTIONS\(_type, _name\) _type _name; enum __CF_OPTIONS_ATTRIBUTES'
+            if re.search(regex, contents, re.MULTILINE):
+                is_cf_options_interop_updated = False
+
+if is_cf_options_interop_updated:
+    config.available_features.add('cxx-interop-fixed-cf_options')
+
 if get_target_os() in ['windows-msvc']:
     config.substitutions.insert(0, ('%target-abi', 'WIN'))
     # Clang should build object files with link settings equivalent to -libc MD