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Linux: Fix PRIME detection on Steam

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To avoid trying to do PRIME detection on fake `libGL.so` as used by e.g.
Renderdoc or Primus, we skip detection if there's a `libGL.so` in
`LD_LIBRARY_PATH`... and our luck is that Steam defines it and includes
system paths too, thus the actual system `libGL`... 🤦

So if we detect Steam, we skip this check.

Co-authored-by: Hein-Pieter van Braam-Stewart <hp@tmm.cx>
This commit is contained in:
Rémi Verschelde 2021-03-08 15:42:07 +01:00
parent 26d1b30d35
commit ae850177a3
1 changed files with 4 additions and 1 deletions
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5
platform/linuxbsd/display_server_x11.cpp
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@ -4030,7 +4030,10 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
use_prime = 0;
}
if (getenv("LD_LIBRARY_PATH")) {
// Some tools use fake libGL libraries and have them override the real one using
// LD_LIBRARY_PATH, so we skip them. *But* Steam also sets LD_LIBRARY_PATH for its
// runtime and includes system `/lib` and `/lib64`... so ignore Steam.
if (use_prime == -1 && getenv("LD_LIBRARY_PATH") && !getenv("STEAM_RUNTIME_LIBRARY_PATH")) {
String ld_library_path(getenv("LD_LIBRARY_PATH"));
Vector<String> libraries = ld_library_path.split(":");