Log message:
Simply and speed up buildlink3.mk files and processing.
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.

Log message:
Don't leak rpath references to the work directory. Bump revision.

Log message:
Mark some packages as not for bulk building on HPUX.

Log message:
USE_DESTDIR is not supposed to be set by package Makefiles.

Log message:
Gauche supports DESTDIR nicely; enable full DESTDIR.

Log message:
Convert to use PLIST_VARS instead of manually passing "@comment "
through PLIST_SUBST to the plist module.

Log message:
When including a builtin.mk file, you need to guard it with CHECK_BUILTIN.*
settings so that the builtin.mk can be safely included by the buildlink3
framework later on.

Log message:
Add a missing @dirrm

Log message:
Try to fix iconv breakage when USE_BUILTIN.iconv=no

Log message:
Update to Gauche-0.8.13.

pkgsrc changes
- DESTDIR support
- use libtool
- make iconv work
- fix a PLIST error
- close PR pkg/37897

Upstream changes
- Sorry, too many to list here