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Asked: 2026-06-03T21:20:26+00:00

I have a C++ codebase which is used by our Android project via JNI

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I have a C++ codebase which is used by our Android project via JNI (build scripts and such are all Android-specific). I need to update our Objective C project with it which is using an older version of the same library. Problem is that I have only the Objective C code but not the old C++ code and iOS makefiles (they were done by an external agency) – only a binary .a file. How can I generate such a static iOS lib from the JNI code, where to start? I’m reading this right now: http://www.clintharris.net/2009/iphone-app-shared-libraries/ and will update this post with more details if you are interested in helping.

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  1. Editorial Team

    Are you having specific problems in trying this? Assuming the code is cross platform and can run on iOS you simply need to either create a new makefile (Android’s are specialized) or drag the files in a new or existing XCode project.

    Apple’s Clang can compile (and you can certainly mix) C, C++ and Obj-C. If you need to for example mix Obj-C and C++ name your file .mm and go.

    Example Makefile (note: sloppy but should illustrate!):
    http://pastebin.com/ZyrsfT87

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