### 4.6 `polyorb.gpr`

This section describes how to build your program using project files. An alternative method, using `polyorb-config`, is described in the following section. `polyorb-config` is intended primarily for Unix-like systems. The project-file method will work on all supported systems.

To build your application, create a project file as usual. Import the `polyorb.gpr` project by putting `with "polyorb";` in your project file.

Set the ADA_PROJECT_PATH environment variable to point to the directory containing `polyorb.gpr`, which is `<prefix>/lib/gnat`. If SOAP is being used, ADA_PROJECT_PATH must also be set so we can find `xmlada.gpr`.

If your project file is `my_proj.gpr`, you can build it by saying:

      $ gnatmake -P my_proj

See the GNAT User’s Guide and the GNAT Reference Manual for more information on project files.