[Libreoffice] configure.in monstrosity

[Tomáš Chvátal]

Hi guys,

I was editing the configure.in file in order to fix one tiny bug and
found out it is horrible scarry place.

It would be really nice if that huge file would be split into several
separate parts per-use.

So I would like to propose slow cleanup/splitting to have simple
configure.ac with
platform check, and then i would move each configure option and
switches into per feature
macros in m4/.

This way we could easily overview all the options, and it would also
improve the readability.

What do you think about this?

Cheers

Tom