Library folder does not exist. Consider setting up caching to speed up your workflow, if this is not your first build.

Assets/Samples is a symbolic link. Using symlinks in Unity projects may cause your project to become corrupted if you create multiple references to the same asset, use recursive symlinks or use symlinks to share assets between projects used with different versions of Unity. Make sure you know what you are doing.

Assets/Samples/Demo/Scripts/UIParticle_Demo.cs(11,24): warning CS0649: Field 'UIParticle_Demo.m_RootCanvas' is never assigned to, and will always have its default value null

Assets/Samples/Demo/Scripts/UIParticle_Demo_UIParticleController.cs(10,27): warning CS0649: Field 'UIParticle_Demo_UIParticleController.m_RootTransform' is never assigned to, and will always have its default value null

Assets/Samples/Demo/Scripts/UIElementDragger.cs(16,18): warning CS0649: Field 'UIElementDragger.m_UseCanvasScale' is never assigned to, and will always have its default value false

Assets/Samples/Demo/Scripts/UIElementDragger.cs(12,23): warning CS0649: Field 'UIElementDragger.m_CustomTarget' is never assigned to, and will always have its default value null

Assets/Samples/Demo/Scripts/UIElementDragger.cs(9,20): warning CS0649: Field 'UIElementDragger.m_Target' is never assigned to, and will always have its default value

Assets/Samples/Demo/Scripts/CopyItemOnStart.cs(14,21): warning CS0649: Field 'CopyItemOnStart.m_Count' is never assigned to, and will always have its default value 0

Assets/Samples/Demo/Scripts/CopyItemOnStart.cs(10,28): warning CS0649: Field 'CopyItemOnStart.m_Origin' is never assigned to, and will always have its default value null