[libvirt] [PATCH 3/3] m4: Check for rl_completion_quote_character

[Andrea Bolognani]

On Mon, 2018-01-15 at 10:26 +0100, Andrea Bolognani wrote:
> macOS has brew, though. I've kicked off a Travis build with this
> commit[1] included, let's see whether configure picks up readline
> installed from brew instead of the obsolete one available in the
> base system.

Nope, it still picks up the one shipped with the OS :/

> If it does, then we can omit your patch and... Document the version
> requirement somehow? If we used pkg-config to detect readline
> availability, that would be easy. Alas, readline only introduced
> pkg-config support relatively recently, so we can't do that.

So, one way to solve this once and for all would be to:

  * try looking up readline through pkg-config. If that works,
    then we already know we're compiling against a recent
    readline version and everything will work;

  * if readline's pkg-config file is not available, try linking
    against it the old way. This will succeed on oldish versions
    like the one shipped with CentOS but fail because of missing
    functions on macOS.

I could try cooking up something like the above, but I can never
seem to get it right the first couple of times when m4 is involved,
so in the interest of time - and not having to merge this patch you
hate ;) - would you mind looking into it yourself instead?

-- 
Andrea Bolognani / Red Hat / Virtualization