Fix python ext build on kokoro (#4527)

1 files changed, 2 insertions, 0 deletions

diff --git a/python/setup.py b/python/setup.py
index bdae6913..9a328cb5 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -206,6 +206,8 @@ if __name__ == '__main__':
       v = float('.'.join(v.split('.')[:2]))
       if v >= 10.12:
         extra_compile_args.append('-std=c++11')
+    elif os.getenv('KOKORO_BUILD_NUMBER') or os.getenv('KOKORO_BUILD_ID'):
+        extra_compile_args.append('-std=c++11')
 
     if warnings_as_errors in sys.argv:
       extra_compile_args.append('-Werror')