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Asked: 2026-05-23T11:43:04+00:00

I added .h/.cpp files with C functions to my Xcode project. How would I

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I added .h/.cpp files with C functions to my Xcode project. How would I call a C function in an objective-C function?

When I included the C file (#import “example.h”) in the app delegate header file it exploded with errors (could be that it treated the cpp file as objective-c) even though it compiles fine without being included/imported.

Thanks

Edit: Renaming all the files from m to mm fixed the issue. However I am getting a linker error when building (ld: duplicate symbol)… Better research this first. Thanks again all.

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1 Answer

  1. Editorial Team

    If you want to use C++ with your Objective-C module, change the file extension from .m to .mm.

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