-Latest Solus 4 and Steam client via the Software center
Issue started sometime a week or two ago. I've made a thread about it on the Steam Linux forum and got some feedback that I'll share here.
When "Use native runtime" is engaged in the Steam integration application the Steam client fails to load, saying:
steam
Running Steam on solus 4.0 64-bit
STEAM_RUNTIME is disabled by the user
Installing breakpad exception handler for appid(steam)/version(1562035213)
Installing breakpad exception handler for appid(steam)/version(1562035213)
Installing breakpad exception handler for appid(steam)/version(1562035213)
Failed to load steamui.so - dlerror(): /home/to/.local/share/Steam/ubuntu12_32/steamui.so: undefined symbol: SDL_RWclose
When Use native runtime is disengaged (and the Steam integration application has been closed) and I attempt to start the Steam client it starts and works. The only side effect is the Wine beige right-click menu it gets then.
Checking these system files for the missing symbol yields:
/usr/lib32/libSDL2-2.0.so.0
/usr/lib64/libSDL2-2.0.so.0
nm -C libSDL2-2.0.so.0 | grep RWclose : "No symbols."
Whereas the same search in the same named files in /.local/share/Steam/ubuntu12_32
and /.steam/ubuntu12_32 (and _64 folders) finds it.