- Don't run autoreconf, but run some of the autotools from pre-configure
instead. Autoreconf runs autoheader which replaces a handmade config
header.
- Remove options. DEBUG only adds -g which is already handled by
WITH_DEBUG. DERIV and R12 don't have any impact. They are enabled by
default upstream and the port Makefile never passed --disable-* when the
options are disabled. Reasons to remove these options: the only port
(science/mpqc) that depends on this port requires the options to be
enabled, no additional dependencies and no significant additional build
time or disk space.