(In reply to comment #8)
> Yeah, I'm aware there are some ABI issues on Arch Linux with Steam's bundled
> libgcc_s.so.

You can probably avoid the issues by moving away the bundled libraries.

(In reply to comment #9)
> Is standalone glamor officialy deprecated with xorg-server 1.16?

There's no reason to use glamor from the standalone tree with a version of
xserver which includes glamor.

> Are you going to do anything about users of 1.15

There are plans for backporting the glamor changes from xserver to the
standalone tree, but the details are still being worked out.

> or can indirect GLX be safely neglected? :)

GLX indirect rendering is never desirable for local clients.