From 75fb5bb7e7604eb9547fecf17d31c5f8f7bc55fd 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.

---
 lang/swi-prolog-lite/buildlink3.mk | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

(limited to 'lang/swi-prolog-lite')

diff --git a/lang/swi-prolog-lite/buildlink3.mk b/lang/swi-prolog-lite/buildlink3.mk
index aa9e87ddba8..1e5235e5889 100644
--- a/lang/swi-prolog-lite/buildlink3.mk
+++ b/lang/swi-prolog-lite/buildlink3.mk
@@ -1,22 +1,15 @@
-# $NetBSD: buildlink3.mk,v 1.5 2006/07/08 23:10:56 jlam Exp $
+# $NetBSD: buildlink3.mk,v 1.6 2009/03/20 19:24:53 joerg Exp $
 
-BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH}+
-SWI_PROLOG_LITE_BUILDLINK3_MK:=	${SWI_PROLOG_LITE_BUILDLINK3_MK}+
+BUILDLINK_TREE+=	swi-prolog-lite
 
-.if !empty(BUILDLINK_DEPTH:M+)
-BUILDLINK_DEPENDS+=	swi-prolog-lite
-.endif
+.if !defined(SWI_PROLOG_LITE_BUILDLINK3_MK)
+SWI_PROLOG_LITE_BUILDLINK3_MK:=
 
-BUILDLINK_PACKAGES:=	${BUILDLINK_PACKAGES:Nswi-prolog-lite}
-BUILDLINK_PACKAGES+=	swi-prolog-lite
-BUILDLINK_ORDER:=	${BUILDLINK_ORDER} ${BUILDLINK_DEPTH}swi-prolog-lite
-
-.if !empty(SWI_PROLOG_LITE_BUILDLINK3_MK:M+)
 BUILDLINK_API_DEPENDS.swi-prolog-lite+=	swi-prolog-lite>=5.2.9
 BUILDLINK_PKGSRCDIR.swi-prolog-lite?=	../../lang/swi-prolog-lite
-.endif	# SWI_PROLOG_LITE_BUILDLINK3_MK
 
 .include "../../devel/ncurses/buildlink3.mk"
 .include "../../devel/readline/buildlink3.mk"
+.endif # SWI_PROLOG_LITE_BUILDLINK3_MK
 
-BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH:S/+$//}
+BUILDLINK_TREE+=	-swi-prolog-lite
-- 
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