Alessandro Bono b6767d2eef meson: Decouple linux/dma-buf.h and libdrm checks ...

Currently dmabuf_dep is found when the following conditions are met:
 - linux/dma-buf.h is present;
 - libdrm is found.

This is because Linux dmabuf support requires drm_fourcc.h which is part
of libdrm.

However, dmabuf_dep is used for two purposes:
 - define HAVE_DMABUF to state dmabuf support;
 - ensure the presence of drm_fourcc.h for gdk and for the
   media-gstreamer module.

Decouple this, unconditionally check for libdrm and require it on
Linux. Then, use libdrm_dep only to state the drm_fourcc.h presence.

Given that now we unconditionally require libdrm on Linux, HAVE_DMABUF
depends only on the linux/dma-buf.h presence.

2024-02-16 14:01:44 +01:00

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