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GNU macro processor

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6. How to debug macros and input

When writing macros for m4, most of the time they woould not work as intended (as is the case with most programming languages). There is a little support for macro debugging in m4.

6.1 Displaying macro definitions  
6.2 Tracing macro calls  
6.3 Controlling debugging output  
6.4 Saving debugging output  


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