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EiffelStudio

# Using libraries

There are two kinds of libraries in Eiffel: precompiled Eiffel libraries and C libraries.

To use an Eiffel precompiled library:

- Open the Project Settings dialog.
- Add a new precompile group to your target.
- You must recompile your project from scratch for the changes to take effect.

Note: You can only use one precompiled library at a time in a project. To use more than one, you should precompile all the libraries you want to use together in a single precompiled library.

To use a C library:

- Open the Project Settings dialog.
- Add an include external for the directory where the header files needed to use the library are.
- Add an object external for each object file needed to use the library. These files can be either library files (.lib, .a, etc) or object files (.obj, .o, etc)
- Click OK.
- You must recompile your project for the changes to take effect.

See Also
Creating libraries
Adding classes and clusters from Eiffel libraries without precompiling the library
Making C calls in Eiffel