Comment # 3
on bug 103575
from Adam Jackson
(In reply to Hi-Angel from comment #2) > (In reply to Adam Jackson from comment #1) > > Mesa doesn't implement EGL_EXT_device_enumeration yet, so this isn't > > entirely surprising. > > Then, shouldn't I be getting either linking or calling errors? If your libEGL is from libglvnd then no. glvnd has explicit support for QueryDevicesEXT because it has to aggregate the results from all installed vendor libraries. Which means eglGetProcAddress will return the glvnd frontend function, even if no vendors support the extension. That's arguably a bug in glvnd. It should at minimum return an error if it enumerates zero devices, I think. But I think your code is already in error in calling eglQueryDevicesEXT without checking that EGL_EXT_device_enumeration is in the client extension string (it certainly isn't on my machine, which does use libglvnd).
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