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A dictionary containing name/value pairs is returned. If an optional dictionary is passed in as the second argument, it is used instead of a new dictionary. r Nz"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)z \$\(([A-Za-z][A-Za-z0-9_]*)\)z\${([A-Za-z][A-Za-z0-9_]*)}�errors�surrogateescape�#� � r z$$�$�CFLAGS�LDFLAGS�CPPFLAGSTF�PY_r )re rf rg )�re�compile�open� readlines� startswith�strip�match�group�replace�int� ValueError�listr< �len�tuple�search�start�strr) r6 �end�remover= � isinstance�update)�filenamerJ ri � _variable_rx� _findvar1_rx� _findvar2_rx�done�notdone�f�lines�line�m�n�v�tmpv� variables�renamed_variablesrF rB �m1�m2�found�item�after�kr! r! r" �_parse_makefile� s� ! 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