[Windows] Glutin loads an unrelated libEGL.dll from the other app

[syrel]

Hi 😃

A glutin based app was crashing for one of the users on Windows 10.
While debugging it, we noticed that there were unrelated library loads:

C:\Program Files\OtherUserApp\bin\pc-win64\libEGL.dll
C:\Program Files\OtherUserApp\bin\pc-win64\libGLESv2.dll

The flow which causes this load is:
build_headless (glutin_sys) -> new_headless -> EGL lazy static -> LoadLibrary

In new_headless, if no windowed sharing was specified, it tries to load libEGL.dll from the load path, which in user's case was in PATH from another program, and it led to a crash later on.

The library is defined here:

glutin/glutin/src/api/egl/mod.rs

Line 93 in 33aec60

let paths = vec!["libEGL.dll", "atioglxx.dll"];

Windows guides suggest that when performing a dynamic loading we should search dynamic libraries within the app (relative) and/or rely on absolute paths for safety (https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order).

Would it be possible to update library path in egl/mod.rs to relative within the glutin app?

Thank you 👍