vendor/libc++/libc++-trunk-r304149

1 files changed, 13 insertions, 0 deletions

diff --git a/utils/libcxx/test/config.py b/utils/libcxx/test/config.py
index 2118f9c7eb90..1bf2677a8509 100644
--- a/utils/libcxx/test/config.py
+++ b/utils/libcxx/test/config.py
@@ -142,6 +142,7 @@ class Configuration(object):
         self.configure_sanitizer()
         self.configure_coverage()
         self.configure_modules()
+        self.configure_coroutines()
         self.configure_substitutions()
         self.configure_features()
 
@@ -954,6 +955,18 @@ class Configuration(object):
             self.cxx.flags += ['-g', '--coverage']
             self.cxx.compile_flags += ['-O0']
 
+    def configure_coroutines(self):
+        if self.cxx.hasCompileFlag('-fcoroutines-ts'):
+            macros = self.cxx.dumpMacros(flags=['-fcoroutines-ts'])
+            if '__cpp_coroutines' not in macros:
+                self.lit_config.warning('-fcoroutines-ts is supported but '
+                    '__cpp_coroutines is not defined')
+            # Consider coroutines supported only when the feature test macro
+            # reflects a recent value.
+            val = macros['__cpp_coroutines'].replace('L', '')
+            if int(val) >= 201703:
+                self.config.available_features.add('fcoroutines-ts')
+
     def configure_modules(self):
         modules_flags = ['-fmodules']
         if platform.system() != 'Darwin':