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Asked: 2026-05-12T16:19:22+00:00

I have a .h file which is used almost throughout the source code (in

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I have a .h file which is used almost throughout the source code (in my case, it is just one directory with. .cc and .h files). Basically, I keep two versions of .h file: one with some debugging info for code analysis and the regular one. The debugging version has only one extra macro and extern function declaration. I switch pretty regularly between two versions. However, this causes a 20 minute recompilation.

How would you recommend to avoid this issue of recompilation? Perhaps to set some flags, create different tree? what are the common solutions and how to embed them?

The new .h file contains:

extern  void (foo)(/*some params*/);

/***extra stuff****/
#define foo(...) ( /*call_some_function*/) , foo())
/*some_functions*_for_debugging/

As, you can see that will ensue a recompilation. I build with gcc on Linux AS 3

Thanks

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1 Answer

  1. Editorial Team

    To avoid the issue with an external function , you could leave the prototype in both versions, it doesn’t harm being there, if not used. But with the macro no chance, you can forget it, it needs recompilation for code replacements.

    I would make intensive use of precompiled headers to fasten recompilation (as it cannot be avoided). GCC and Precompiled-Headers. For other compilers use your favorite search engine. Any modern compiler should support this feature, for large scale projects it’s inevitable you have to use it otherwise you’ll be really unproductive.

    Beside this, if you have enough disk space, I would check out two working copies. Each of them compiled with different settings. You would have to commit and update each time to transfer changes to the other working copy but it’ll take for sure less than 20mins 😉

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