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.

---
 graphics/exiv2/buildlink3.mk | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

(limited to 'graphics/exiv2')

diff --git a/graphics/exiv2/buildlink3.mk b/graphics/exiv2/buildlink3.mk
index 50444b50c9e..c5253dde7eb 100644
--- a/graphics/exiv2/buildlink3.mk
+++ b/graphics/exiv2/buildlink3.mk
@@ -1,21 +1,14 @@
-# $NetBSD: buildlink3.mk,v 1.8 2009/01/07 01:07:51 gdt Exp $
+# $NetBSD: buildlink3.mk,v 1.9 2009/03/20 19:24:38 joerg Exp $
 
-BUILDLINK_DEPTH:=	${BUILDLINK_DEPTH}+
-EXIV2_BUILDLINK3_MK:=	${EXIV2_BUILDLINK3_MK}+
+BUILDLINK_TREE+=	exiv2
 
-.if ${BUILDLINK_DEPTH} == "+"
-BUILDLINK_DEPENDS+=	exiv2
-.endif
+.if !defined(EXIV2_BUILDLINK3_MK)
+EXIV2_BUILDLINK3_MK:=
 
-BUILDLINK_PACKAGES:=	${BUILDLINK_PACKAGES:Nexiv2}
-BUILDLINK_PACKAGES+=	exiv2
-BUILDLINK_ORDER:=	${BUILDLINK_ORDER} ${BUILDLINK_DEPTH}exiv2
-
-.if ${EXIV2_BUILDLINK3_MK} == "+"
 # 0.18 changes the signature of printTag
 BUILDLINK_API_DEPENDS.exiv2+=	exiv2>=0.18
 BUILDLINK_ABI_DEPENDS.exiv2+=	exiv2>=0.18
 BUILDLINK_PKGSRCDIR.exiv2?=	../../graphics/exiv2
-.endif	# EXIV2_BUILDLINK3_MK
+.endif # EXIV2_BUILDLINK3_MK
 
-BUILDLINK_DEPTH:=	${BUILDLINK_DEPTH:S/+$//}
+BUILDLINK_TREE+=	-exiv2
-- 
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