Add Arachne-pnr to prepare.

At the moment it expects wip/icestorm to be installed & is requires some files
to build correctly.
Will need to add buildlink support to wip/icestorm.

arachne-pnr-git/DESCR

@@ -0,0 +1,2 @@
+Arachne-pnr implements the place and route step of the hardware compilation
+process for FPGAs.

arachne-pnr-git/Makefile

@@ -0,0 +1,25 @@
+# $NetBSD$
+
+DISTNAME=	arachne-pnr-52e69ed
+CATEGORIES=	cross
+MASTER_SITES=	${MASTER_SITE_GITHUB:=cliffordwolf/}
+
+MAINTAINER=	pkgsrc-users@NetBSD.org
+HOMEPAGE=	https://github.com/cliffordwolf/
+COMMENT=	Place and route tool for FPGAs
+LICENSE=	mit
+
+USE_LANGUAGES+=		c++
+USE_TOOLS+= 		gmake
+LIBS+= 			-lm
+
+GIT_REPOSITORIES=	arachne-pnr
+GIT_REPO.arachne-pnr=	git://github.com/cseed/arachne-pnr.git
+GIT_REVISION.arachne-pnr=	52e69ed207342710080d85c7c639480e74a021d7
+WRKSRC=			${WRKDIR}/arachne-pnr
+MAKE_ENV+=		ICEBOX=${PREFIX}/share/icebox
+MAKE_ENV+=		DESTDIR=${DESTDIR}
+MAKE_ENV+= 		PREFIX=${PREFIX}
+
+.include "../../wip/mk/git-package.mk"
+.include "../../mk/bsd.pkg.mk"

arachne-pnr-git/PLIST

@@ -0,0 +1,4 @@
+@comment $NetBSD$
+bin/arachne-pnr
+share/arachne-pnr/chipdb-1k.bin
+share/arachne-pnr/chipdb-8k.bin

arachne-pnr-git/distinfo

@@ -0,0 +1,3 @@
+$NetBSD$
+
+SHA1 (patch-Makefile) = e5dda0f3de2cc5f1b6b8409485de47d43ae519b6

arachne-pnr-git/patches/patch-Makefile

@@ -0,0 +1,42 @@
+$NetBSD$
+
+Allow variables to be overridden and integrated into a build system. 
+
+--- Makefile.orig	2016-12-04 03:42:47.000000000 +0000
++++ Makefile
+@@ -13,8 +13,9 @@ SRC = src
+ CXXFLAGS = -I$(SRC) -std=c++11 -MD $(OPTDEBUGFLAGS) -Wall -Wshadow -Wsign-compare -Werror
+ LIBS = -lm
+ 
+-DESTDIR = /usr/local
+-ICEBOX = /usr/local/share/icebox
++DESTDIR ?= /usr/local
++ICEBOX ?= /usr/local/share/icebox
++PREFIX ?=
+ 
+ .PHONY: all
+ all: bin/arachne-pnr share/arachne-pnr/chipdb-1k.bin share/arachne-pnr/chipdb-8k.bin
+@@ -104,16 +105,16 @@ mxebin:
+ 
+ .PHONY: install
+ install: all
+-	mkdir -p $(DESTDIR)/bin
+-	cp bin/arachne-pnr $(DESTDIR)/bin/arachne-pnr
+-	mkdir -p $(DESTDIR)/share/arachne-pnr
+-	cp share/arachne-pnr/chipdb-1k.bin $(DESTDIR)/share/arachne-pnr/chipdb-1k.bin
+-	cp share/arachne-pnr/chipdb-8k.bin $(DESTDIR)/share/arachne-pnr/chipdb-8k.bin
++	mkdir -p $(DESTDIR)$(PREFIX)/bin
++	cp bin/arachne-pnr $(DESTDIR)$(PREFIX)/bin/arachne-pnr
++	mkdir -p $(DESTDIR)$(PREFIX)/share/arachne-pnr
++	cp share/arachne-pnr/chipdb-1k.bin $(DESTDIR)$(PREFIX)/share/arachne-pnr/chipdb-1k.bin
++	cp share/arachne-pnr/chipdb-8k.bin $(DESTDIR)$(PREFIX)/share/arachne-pnr/chipdb-8k.bin
+ 
+ .PHONY: uninstall
+ uninstall:
+-	rm -f $(DESTDIR)/bin/arachne-pnr
+-	rm -f $(DESTDIR)/bin/share/arachne-pnr/*.bin
++	rm -f $(DESTDIR)$(PREFIX)/bin/arachne-pnr
++	rm -f $(DESTDIR)$(PREFIX)/bin/share/arachne-pnr/*.bin
+ 
+ .PHONY: clean
+ clean: