most of the former options in makepkg.conf, and are described in detail
there:
BUILDENV=(fakeroot !distcc color !ccache)
OPTIONS=(strip !docs !libtool emptydirs)
Note that PKGBUILD specified options will always have final say. They will
now be specified as they are above, except using lowercase 'options' array.
* makepkg was fixed so options actually work as expected.