[BRLTTY] Build brltty with support for espeak-ng

[Dave Mielke]

[quoted lines by Tage Johansson on 2019/12/13 at 23:31 +0100]

>I'm using 1.50, but I tried with both 1.49.2 and the latest development
>version 1.51-dev. But None of them were better.

So I guess it's a bug that's never been fixed (or maybe even known about).

>I don't know why it is working worse for me than some others, but I think it
>may depend on the fact that I'm using an arm architecture.

Remember that it also happens for me (so on x86_64) right after a reboot. I've
been trying to think of what might be different between starting brltty as part
of a system boot versus starting it interactively. So far, I have no ideas.

>What functions are brltty calling from espeak-ng? 

espeak_Synth() to speak, and espeak_Cancel() to mute.

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