Consider using the libdecor module from the runtime

KDE runtime version **6.9** (based on the freedesktop runtime version **24.08**) appears to provide the **libdecor** module.

In most cases, you don't need to build this module separately, unless your project requires a specific version or a custom configuration.

**Related manifest file:**

https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/blob/release/24.08/elements/components/libdecor.bst

**Other modules provided by the Freedesktop 24.08**

https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/blob/release/24.08/elements/platform.bst

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It also appears to provide the **gamemode** module with a different settings.

https://gitlab.com/freedesktop-sdk/freedesktop-sdk/-/blob/release/24.08/elements/components/gamemode-base.bst