bug#29931: 27.0.50; Slightly suboptimal build behavior on macOS

[Alan Third]

On Tue, Jan 02, 2018 at 08:19:00PM +0000, Alan Third wrote:
> I’m not sure how portable this test needs to be since it should only
> run on darwin:
> 
>     if test "${opsys}" = darwin && test -z "${MAKEINFO}" && \
>        test -x /usr/local/opt/texinfo/bin/makeinfo; then

I’ve done some investigation and come up with a version that uses
autoconfig macros.

I also looked into macports and it seems it always includes everything
you’ve installed, unlike homebrew, so we shouldn’t run into this issue
with it.

-- 
Alan Third

0001-Fix-build-issues-on-macOS-bug-29931.patch
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