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.
Remember .include "foo.mk" is looked for (first) in the directory that
contains the makefile being processed (like in C), so remove all the
${.PARSEDIR} and ../ sequences that just cause grief.
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
in their tests for built-in versions of the PAM implementations. The
MacOS X case now collapses nicely into the linux-pam case. Allow
pam.buildlink3.mk to use solaris-pam as an accepted PAM implementation.
It includes the correct buildlink3.mk file from either Linux-PAM
(security/PAM) or OpenPAM (security/openpam) and eventually will
support solaris-pam. pam.buildlink3.mk will:
* set PAMBASE to the base directory of the PAM files;
* set PAM_TYPE to the PAM implementation used.
There are two variables that can be used to tweak the selection of
the PAM implementation:
PAM_DEFAULT is a user-settable variable whose value is the default
PAM implementation to use.
PAM_ACCEPTED is a package-settable list of PAM implementations
that may be used by the package.
Modify most packages that include PAM/buildlink3.mk to include
pam.buildlink3.mk instead.
