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### 2.3 Optional configuration steps

On any platform, after installing the compiler you may wish to set some environment variables. The Free Pascal compiler recognizes the following variables :

- PPC_EXEC_PATH contains the directory where support files for the compiler can be found.
- PPC_CONFIG_PATH specifies an alternate path to find the fpc.cfg.
- PPC_ERROR_FILE specifies the path and name of the error-definition file.
- FPCDIR specifies the root directory of the Free Pascal installation. (e.g : C:\PP\BIN)

These locations are, however, set in the sample configuration file which is built at the end of the installation process, except for the PPC_CONFIG_PATH variable, which you must set if you didn’t install things in the default places.

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