## Developer and Packager Notes

## Using pkg-config to determine paths

Developers or packagers of PKCS#11 modules need to install various files into specific locations so that p11-kit will recognize and load the module correctly.

You should use `pkg-config` as described below to determine configuration paths. p11-kit installs a `pkg-config` file called `p11-kit-1.pc`. This file contains all the information about the various paths that p11-kit looks for files at.

### Path to place module configuration

As described in the module configuration documentation, each PKCS#11 module should install a config file describing that module. These config files should be installed to a specific directory which can be determined by running:

    $ pkg-config p11-kit-1 --variable p11_system_config_modules
    /etc/pkcs11/modules

### Default path for modules with relative paths

If a module configuration contains a relative path in its `module:` setting, then that module will be loaded from the default module path. This path can be determined by running:

    $ pkg-config p11-kit-1 --variable p11_module_path
    /usr/lib64/pkcs11