Is media-libs/libsdl2[alsa] dependency neccessary?

[fpemud]

I found that these packages depend on media-libs/libsdl2[alsa] when trying to install and my system is using media-libs/libsdl2[pipewire,-alsa].

AFAIK, alsa/pulseaudio/pipewire/oss are different sound backends of libsdl2. Application should not aware of the difference.

Is there any particular reason why this dependency is needed?

Can this dependency be optimized?

[tx00100xt]

It's just that when I wrote ebuilds, it all started with rewriting sam-sam-tse-1_beta1-r1.ebuild, which is included in portage.
https://gitweb.gentoo.org/repo/gentoo.git/tree/games-fps/serious-sam-tse/serious-sam-tse-1_beta1-r1.ebuild

Is there any particular reason why this dependency is needed?

There was no specific reason to add the flag.

Can this dependency be optimized?

Of Course.I'll just remove this dependency.

[tx00100xt]

Ready. Removed unnecessary dependencies. Updated IUSE.

UPD:
Found another bug related to the patch for the new version 1.10.5.
Fixed. 72baaa5 42db012
I checked the building of all versions 1.10.4, 1.10.5, 9999. Now everything is fine.