new .tar.gz for each download. each new .tar.gz has a new gzip
timestamp, so the gz is different each download (the tar itself is
the same). this makes it impossible to match the checksum in distinfo,
so we pull it from a static file on MASTER_SITE_BACKUP instead,
as suggested by Thomas Klausner.
Problems found with existing distfile:
distfiles/libiconv-1.13-cp932.patch.gz
No changes made to the libiconv distinfo file.
Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden). All existing
SHA1 digests retained for now as an audit trail.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.
TECkit is a low-level toolkit intended to be used by other
applications that need to perform encoding conversions (e.g., when
importing legacy data into a Unicode-based application). The primary
component of the TECkit package is therefore a library that performs
conversions; this is the "TECkit engine". The engine relies on
mapping tables in a specific binary format (for which documentation is
available); there is a compiler that creates such tables from a
human-readable mapping description (a simple text file).
