calls to avoid build errors in the future.
  "ERROR: Make sure '#' in rule 't_POUND' is escaped with '\#'")
ERROR: test_concatenation (__main__.CPPTests.test_concatenation)
PermissionError: [Errno 13] Permission denied
ERROR: test_deadloop_macro (__main__.CPPTests.test_deadloop_macro)
PermissionError: [Errno 13] Permission denied
ERROR: test_index_error (__main__.CPPTests.test_index_error)
  File "/home/udu/aports/main/py3-ply/src/ply-3.11/test/testcpp.py", line 91, in test_index_error
PermissionError: [Errno 13] Permission denied
FAILED (errors=3)
>>> ERROR: py3-ply: check failed