type "sudo pacman -S sdl2" and then install the library
yeah I tried similar commands
this is what I'm getting:
______________________
Total Installed size:
Net Upgrade Size:
3.64 MiB
0.00 MiB
:: Proceed with installation? [Y/n] Y
(1/1) checking keys in keyring
HET 100%
(1/1) checking package integrity
HAH 100%
error: sdl2: signature from "Sven-Hendrik Haase <sh@lutzhaase.com>" is unknown trust
:: File /var/cache/pacman/pkg/sd2-2.0.20-1-x86_64.pkg.tar.zst is corrupted (invalid or corru
pted package (PGP signature)).
Do you want to delete it? [Y/n] y
error: failed to commit transaction (invalid or corrupted package (PG signature))
Errors occurred, no packages were upgraded.
(1) (deckesteamdeck ~)$
Thanks @Shahroz. I got it working. The Steam Deck has a read only mode by default for the system files. https://help.steampowered.com/en/faqs/view/671A-4453-E8D2-323C and they warn installing via pacman may be overwritten in future Steam OS updates.
But running the Windows version via Proton works beautifully. Appreciate the help.