From 405c61d80251d8e80401aed2264d4bede218cb22 Mon Sep 17 00:00:00 2001
From: joerg <joerg>
Date: Fri, 20 Mar 2009 19:23:50 +0000
Subject: 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.

---
 devel/libusb/buildlink3.mk | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

(limited to 'devel/libusb')

diff --git a/devel/libusb/buildlink3.mk b/devel/libusb/buildlink3.mk
index 1ae02f3a66c..3d2758c0565 100644
--- a/devel/libusb/buildlink3.mk
+++ b/devel/libusb/buildlink3.mk
@@ -1,20 +1,13 @@
-# $NetBSD: buildlink3.mk,v 1.7 2006/07/08 23:10:46 jlam Exp $
+# $NetBSD: buildlink3.mk,v 1.8 2009/03/20 19:24:23 joerg Exp $
 
-BUILDLINK_DEPTH:=	${BUILDLINK_DEPTH}+
-LIBUSB_BUILDLINK3_MK:=	${LIBUSB_BUILDLINK3_MK}+
+BUILDLINK_TREE+=	libusb
 
-.if !empty(BUILDLINK_DEPTH:M+)
-BUILDLINK_DEPENDS+=	libusb
-.endif
+.if !defined(LIBUSB_BUILDLINK3_MK)
+LIBUSB_BUILDLINK3_MK:=
 
-BUILDLINK_PACKAGES:=	${BUILDLINK_PACKAGES:Nlibusb}
-BUILDLINK_PACKAGES+=	libusb
-BUILDLINK_ORDER:=	${BUILDLINK_ORDER} ${BUILDLINK_DEPTH}libusb
-
-.if !empty(LIBUSB_BUILDLINK3_MK:M+)
 BUILDLINK_API_DEPENDS.libusb+=	libusb>=0.1.7
 BUILDLINK_ABI_DEPENDS.libusb+=	libusb>=0.1.8nb2
 BUILDLINK_PKGSRCDIR.libusb?=	../../devel/libusb
-.endif	# LIBUSB_BUILDLINK3_MK
+.endif # LIBUSB_BUILDLINK3_MK
 
-BUILDLINK_DEPTH:=	${BUILDLINK_DEPTH:S/+$//}
+BUILDLINK_TREE+=	-libusb
-- 
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