===============dry run============
	printing [perl_output_newline]
***perl_output_newline
	calling  [c_output_newline]
###c_output_newline
	printing [perl_output]
	calling  [c_output]
***perl_output###c_output
=============test_global==========
	printing [perl_output_newline]
	calling  [c_output_newline]
	printing [perl_output]
	calling  [c_output]
test_global buffer:
(***perl_output_newline\n***perl_output)