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Asked: 2026-06-03T22:55:23+00:00

Let us say in some part of the code that a macro has been

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Let us say in some part of the code that a macro has been defined. During compilation, I want to learn if it has been defined and is being used. How might I do this?

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1 Answer

  1. Editorial Team

    Check with #ifndef directive and throw an error with #error directive :

    #ifndef A_MUST_HAVE_MACRO
#error "A must have macro not defined"
#endif
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