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-rwxr-xr-xci/build_appveyor.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ci/build_appveyor.py b/ci/build_appveyor.py
index 56b4d4b..66c2e31 100755
--- a/ci/build_appveyor.py
+++ b/ci/build_appveyor.py
@@ -118,7 +118,7 @@ def _parse_args(argv=None):
parser = argparse.ArgumentParser(description='Build a CMake project on AppVeyor')
parser.add_argument('--install', metavar='DIR', dest='install_dir',
help='install directory')
- parser.add_argument('cmake_args', nargs='*', metavar='CMAKE_ARG',
+ parser.add_argument('cmake_args', nargs='*', metavar='CMAKE_ARG', default=(),
help='additional CMake arguments, to be passed verbatim')
return parser.parse_args(argv)