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:
Bump PKGREVISION for libXaw API depends bump due to libXaw8 removal.

Log message:
Add DESTDIR support.

Log message:
Update to 0.3.1.
Improve COMMENT.
Change configure argument from --with-xawm to --with-xaw3d.
Add to BUILD_DEFS.

(NOTE: I am updating misc/siag also.)

Changelog has:

070830  Two patches from Pascal Terjan fixes buffer overflows
        in MwXFilesel.c and MwXFormat.c.
        Released 0.3.1.

040108  Added John Cwikla's XCC code. Prepended Mw to all files
        and external symbols. This adds "Color Contexts" which
        allow easy colour management with any visual. Anything
        within Mowitz that calls MwAllocColor or MwQueryColor
        will be rewritten to use color contexts instead.

030919  Cleaned up the code for release.
        Released 0.3.0.

030304  New widget in MwApplicationShell.c is subclassed from
        applicationShellWidgetClass, but has callbacks for
        OffiX and Xdnd drops.

030209  MwMenu.c: catch X errors in XGrabButton. Needed for OpenWindows,
        discovered by James B. Hiller <jhiller@visi.net>.
        Released 0.2.3.

030128  Changed malloc to MwMalloc, realloc to MwRealloc and
        free to MwFree in MwRudegrid.c.

Log message:
- fine grained X11 dependencies for packages which have either USE_IMAKE
  or USE_X11BASE set, but don't include mk/x11.buildlink3.mk directly or
  via buildlink3.mks
- introduce BUILDLINK_PREFIX.libXpm as alias for BUILDLINK_PREFIX.xpm
  in the !modular case
- fix some cases where the check for libX11 couldn't work at all by using
  C++ for compilation without including the proper headers

Verified using a full X11_TYPE=xorg bulk build without additional
breakage. Discussed with salo@, wiz@ and send to packages@ for feedback.

Log message:
Mechanically replace all includes of buildlink3.mk of the following
packages with the modular Xorg equivalent. Those are falling back
to the old location by default, so this commmit doesn't change
dependencies.

graphics/xpm ==> x11/libXpm
fonts/Xft2 ==> x11/libXft
x11/Xfixes ==> x11/libXfixes
x11/xcursor ==> x11/libXcursor
x11/Xrender ==> x11/libXrender
x11/Xrandr ==> libXrandr

Log message:
Change the format of BUILDLINK_ORDER to contain depth information as well,
and add a new helper target and script, "show-buildlink3", that outputs
a listing of the buildlink3.mk files included as well as the depth at
which they are included.

For example, "make show-buildlink3" in fonts/Xft2 displays:

	zlib
	fontconfig
	    iconv
	    zlib
	    freetype2
	    expat
	freetype2
	Xrender
	    renderproto

Log message:
Track information in a new variable BUILDLINK_ORDER that informs us
of the order in which buildlink3.mk files are (recursively) included
by a package Makefile.

Log message:
Sort entries -- no change to package.

Log message:
Aligned the last line of the buildlink3.mk files with the first line, so
that they look nicer.