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Editorial Team
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Asked: 2026-05-26T18:41:47+00:00

Our code base conditionally compiles code based on compile-time configs. CDT plugin in Eclipse

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Our code base conditionally compiles code based on compile-time configs. CDT plugin in Eclipse currently does not index compiled-out code, so I can’t jump to a function definition if it’s within #ifdef. How could I enable indexing to work?

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1 Answer

  1. Editorial Team

    You can’t assume that code would compile if the conditionals are ignored. In this light this feature cannot work (in the general case).

    I suggest using a build configuration that defines all the required symbols to compile all the blocks. Of course that means that instead of having

    #ifdef FEATURE_X
    code;
#else
    other code;
#endif

    you’ll have to use the more cumbersome

    #ifdef FEATURE_X
    code;
#endif
#ifdef FEATURE_Y
    other code;
#endif

    So you can let the indexer work with -DFEATURE_X -DFEATURE_Y. However, you can’t debug in such configuration, because both blocks would get executed as well

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