m4: Debugging

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1 7 How to debug macros and input
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1 When writing macros for 'm4', they often do not work as intended on the
1 first try (as is the case with most programming languages).
1 Fortunately, there is support for macro debugging in 'm4'.
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Menu

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· Dumpdef                     Displaying macro definitions
· Trace                       Tracing macro calls
· Debug Levels                Controlling debugging output
· Debug Output                Saving debugging output
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