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Home/ Questions/Q 6744367
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T12:04:31+00:00 2026-05-26T12:04:31+00:00

Is there a preprocessor instruction to make a XCode build fail? (or pragma_mark or

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Is there a preprocessor instruction to make a XCode build fail? (or pragma_mark or something else)

For instance, I develop an application for 3 different environments including several web URL to fetch. So far I don’t know the URL that will be used for the production environment and I want to insert an instruction in my code to prevent an anticipated build from running with this environment.

My code looks like

#ifdef ENV1
...
#endif

#ifdef ENV2
...
#endif

#ifdef ENV3
#some_instruction_that_prevent_success_build
...
#endif

In other words, I want an instruction that acts as a blocking TODO.

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  1. Editorial Team
    Editorial Team
    2026-05-26T12:04:31+00:00Added an answer on May 26, 2026 at 12:04 pm

    The error preprocessor directive is what you’re after.

    #error "Danger, Will Robinson!"
    
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