Switch to `#pragma once` and reimplement `ATTRIBUTE_UNUSED` macro (!51) · Merge requests · libvirt / libvirt-php

Two things happening here. The first is to switch our header files to more modern #pragma once, and the other is to not rely on libxml2 to provide ATTRIBUTE_UNUSED macro, but to declare it ourselves.

Switch to #pragma once and reimplement ATTRIBUTE_UNUSED macro

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Switch to `#pragma once` and reimplement `ATTRIBUTE_UNUSED` macro