bug#17438: xrandr linking problem on OS X

[Glenn Morris]

Glenn Morris wrote:

> Yes; you can see config.log in the latest hydra build.
>
>   pkg-config --exists --print-errors "xrandr > 1.2.2"
>
> returns 0, and
>
>   pkg-config --libs "xrandr > 1.2.2"
>
> seems to return "".

Whereas in the latest emacs-24 branch config.log we see:

    configure:14504: checking for xrandr >= 1.2.2
    Package randrproto was not found in the pkg-config search path.
    Perhaps you should add the directory containing `randrproto.pc'
    to the PKG_CONFIG_PATH environment variable
    Package 'randrproto', required by 'Xrandr', not found
    configure:14516: result: no