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To create a dynamic library so that we could reuse all the custom math functions for other programs, we will split the function declaration into libmydymath.h. Then, we place the functions for circle in mydymath1.c and the power functions in mydymath2.c.
Note: You can have many C program file with just one header file such as lib.h, lib1.c, lib2.c. Create C Dynamic Library in Xcode To create dynamic library in Xcode, please fellow the procedure: On the ' Welcome to Xcode' page, select 'Create a new Xcode project'. Library Naming Convention The naming convention of a library package must be prefix with lib follow by the name of the library and the file must end with.dylib. Therefore a typical library should be named as libmydymath.dylib. However, you can ignore the prefix and the extension when using Xcode.
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In this case, the library name mydymath is alright. Then select the file location of your project. Click Create. Once the project is created you will notice that the target is automatically name libmydymath.dylib.
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Method 2 is much cleaner if your dynamic library is very large. If your library implementation is not big, first method is good enough.
The additional build phase step in method 2 is to copy the dynamic library and place the file together with the application binary file so that when the application runs, it could find the dynamic library. If you intend to place the dynamic library at /usr/lib, please refer to the Xcode user guide. Please note that this example does not involved in multiple versions of the same library. I've also not cover the actual packaging and distribution of the dynamic library itself.
My final word is dynamic library implementation is a very complex subject, please conduct more research.
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