Before starting please see Update for Constant Chars.

D-ISAM is probably best deployed as a framework, which may be created as follows.

1. Start a new Framework project in the IDE.
2. Add your D-ISAM headers, and make sure they are set Public under Target Membership in the File Inspector.
3. Add your D-ISAM source, at least the contents of the base folder, and any other modules you need.
4. In the Framework header (created automatically) #include "isbase.h", or the D-ISAM headers of your choice.

You can use an existing D-ISAM library, including an evaluation library, in place of step 3.

Once built and installed, your D-ISAM framework may be imported into any project by adding the installation directory to Framework Search Paths under Search Paths in Build Options, and optionally, if your installation employs rpath, to Runpath Search Paths under Linking.

Installation is not required if all of your application projects share the same build directory as your D-ISAM framework.

See Creating a Framework and Installing your Framework for the full details.

D-ISAM can also be linked directly into an application by means of the Bridging Header.

This file should include the disam header(s) of your choice.

You may simply add the disam headers directly to your project, or add the disam header directory to the list of User Header Search Paths, in your project Build Settings under Search Paths, in which case you should also set Always Search User Paths to Yes.

You can now copy or link your disam source files directly into your project, or copy or link an existing disam library – including an evaluation library.

You may also wish to see Building D-ISAM in Xcode from the command line.