Lit config attempt #3

Author: Sean Olszewski

Tests/Functional/lit.cfg

@@ -139,3 +139,8 @@ config.substitutions.append(('%{xctest_checker}', '%%{python} %s' % xctest_check
 
 # Add Python to run xctest_checker.py tests as part of XCTest tests
 config.substitutions.append( ('%{python}', pipes.quote(sys.executable)) )
+
+(run_cpu, run_vendor, run_os, run_vers) = re.match('([^-]+)-([^-]+)-([^0-9]+)(.*)', config.variant_triple).groups()
+
+if run_os != 'macosx' or run_vers >= 12:
+    config.available_features.add('concurrency_runtime')