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.
Mozilla's SpiderMonkey. I wish I knew about this sooner! I've tried
this out with elinks, and the javsascript support seems more reliable.
Thanks, OSSP! I vote for killing spidermonkey once we verify all packages
using it build with this.
Local modifications:
--Only build fdlibm into libjs if necessary. This follows
in the spirit of lang/spidermonkey, though someone with more
knowledge of this probably will want to change the list of
platforms in the Makefile.
--Following the aforementioned change, link the library against
-lm (and list -lm in js-config, etc.) only if required.
--Use pkgsrc-provided installation tools instead of shtool.
--Apply fix for __VA_COPY_USE_CPP.
Blurb (DESCR):
OSSP js is a stand-alone distribution of the JavaScript (JS)
programming language reference implementation from Mozilla -- aka
"JSRef" or "SpiderMonkey". This distribution provides a smart,
stand-alone and portable distribution of Mozilla JavaScript through a
GNU autotools-based build environment. Additionally,
the C API in "libjs" contains both the JavaScript engine and the
required Sun math library ("fdlibm") and with all internal symbols
carefully protected under the "js" namespace. Finally, a js-config(1)
utility and a pkg-config(1) specification is provided to allow
applications to easily build with the JavaScript C API.
OSSP js was created because for OSSP and similar pedantic C coding
projects a smart, stand-alone, portable, clean, powerful and
robust scripting language engine is required. JavaScript is a
great programming language and Mozilla JavaScript "SpiderMonkey"
definitely is an acceptable clean, powerful and robust implementation.
Unfortunately there is just a stand-alone distribution released from
time to time by Mozilla and it is far away from really being smart,
stand-alone and portable. OSSP js combines the best from two worlds:
the 1:1 repackaged JavaScript code base from Mozilla with the GNU
autotools-based build environment as always used by OSSP. Additionally,
this package provides stdio-based file object support and does not depend
upon the Mozilla NSPR library.
