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#### 38.4.3 PKG_ADD and PKG_DEL Directives

If the package contains files called `PKG_ADD` or `PKG_DEL` the commands in these files will be executed when the package is added or removed from the users path. In some situations such files are a bit cumbersome to maintain, so the package manager supports automatic creation of such files. If a source file in the package contains a `PKG_ADD` or `PKG_DEL` directive they will be added to either the `PKG_ADD` or `PKG_DEL` files.

In `m`-files a `PKG_ADD` directive looks like this

    ## PKG_ADD: some_octave_command

Such lines should be added before the `function` keyword. In C++ files a `PKG_ADD` directive looks like this

    // PKG_ADD: some_octave_command

In both cases `some_octave_command` should be replaced by the command that should be placed in the `PKG_ADD` file. `PKG_DEL` directives work in the same way, except the `PKG_ADD` keyword is replaced with `PKG_DEL` and the commands get added to the `PKG_DEL` file.