Provide BSD-style Makefile for the device tree compiler (dtc).

Note it is not connected to the build hierarchy yet.

Sponsored by:	The FreeBSD Foundation

gnu/usr.bin/dtc/Makefile

@@ -0,0 +1,51 @@
+# $FreeBSD$
+
+.include <bsd.own.mk>
+
+DTCDIR=	${.CURDIR}/../../../contrib/dtc
+LIBFDTDIR= ${.CURDIR}/../../../sys/contrib/libfdt
+.PATH: ${DTCDIR} ${LIBFDTDIR} ${DTCDIR}/tests
+
+PROG=	dtc
+
+SRCS=	dtc.c checks.c fstree.c livetree.c treesource.c data.c \
+	flattree.c srcpos.c util.c \
+	fdt.c fdt_ro.c fdt_rw.c fdt_strerror.c \
+	fdt_sw.c fdt_wip.c $(DTCDIR)/version_gen.h
+
+CFLAGS = -Wall -g -Os -fPIC -Wpointer-arith -Wcast-qual
+CFLAGS+= -I. -I${.CURDIR} -I${DTCDIR} -I${LIBFDTDIR}
+
+VERSIONMAJ!= awk '/^VERSION =/ { print $$3 }' $(DTCDIR)/Makefile
+VERSIONMIN!= awk '/^PATCHLEVEL =/ { print $$3 }' $(DTCDIR)/Makefile
+VERSIONSUB!= awk '/^SUBLEVEL =/ { print $$3 }' $(DTCDIR)/Makefile
+VERSIONEXTRA!= $(DTCDIR)/scripts/setlocalversion
+
+DTCVERSION:=	${VERSIONMAJ}.${VERSIONMIN}.${VERSIONSUB}${VERSIONEXTRA}
+DTCVERSIONFILE:=	$(DTCDIR)/version_gen.h
+
+MAN=
+
+BISON=	yacc
+LEX=	lex
+
+OBJS+= dtc-parser.tab.o dtc-lexer.lex.o
+
+CLEANFILES+= dtc-parser.tab.o dtc-lexer.lex.o dtc-parser.tab.c \
+		dtc-parser.tab.h dtc-lexer.lex.c ${DTCVERSIONFILE}
+
+$(DTCVERSIONFILE):
+	@echo '#define DTC_VERSION "DTC ${DTCVERSION}"' > ${DTCVERSIONFILE}
+
+dtc-parser.tab.o:	dtc-parser.tab.c dtc-parser.tab.h
+dtc-lexer.lex.o:	dtc-lexer.lex.c dtc-parser.tab.h
+
+dtc-parser.tab.c:	dtc-parser.y
+	$(BISON) -o$@ -d $(DTCDIR)/dtc-parser.y
+
+dtc-parser.tab.h:	dtc-parser.tab.c
+
+dtc-lexer.lex.c: dtc-lexer.l
+	$(LEX) -o$@ $(DTCDIR)/dtc-lexer.l
+
+.include <bsd.prog.mk>