From NetBSD:

Fix problems with the way init.o is built:
* Prevent gratuitous rebuilds when nothing has changed.
* Make sure it is rebuilt if a .h file is updated.

1 files changed, 6 insertions, 9 deletions

diff --git a/bin/sh/Makefile b/bin/sh/Makefile
index 07df49d324e..d84a34cabf4 100644
--- a/bin/sh/Makefile
+++ b/bin/sh/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.22 1995/10/22 00:15:02 christos Exp $
+#	$NetBSD: Makefile,v 1.23 1996/02/18 12:29:18 mycroft Exp $
 #	@(#)Makefile	8.4 (Berkeley) 5/5/95
 
 PROG=	sh
@@ -6,15 +6,16 @@ SRCS=	alias.c builtins.c cd.c echo.c error.c eval.c exec.c expand.c \
 	histedit.c input.c jobs.c mail.c main.c memalloc.c miscbltin.c \
 	mystring.c nodes.c options.c parser.c redir.c show.c syntax.c \
 	trap.c output.c var.c
-OBJS+=	init.o arith.o arith_lex.o
+OBJS+=	arith.o arith_lex.o init.o
 LDADD+=	-ll -ledit -ltermcap
 DPADD+=	${LIBL} ${LIBEDIT} ${LIBTERMCAP}
 LFLAGS= -8	# 8-bit lex scanner for arithmetic
 CFLAGS+=-DSHELL -I. -I${.CURDIR}
 .PATH:	${.CURDIR}/bltin ${.CURDIR}/../../usr.bin/printf
 CLEANFILES+=\
-	builtins.c builtins.h init.c mkinit mknodes mksyntax \
-	nodes.c nodes.h printf.o syntax.c syntax.h token.def y.tab.h
+	arith.c arith_lex.c builtins.c builtins.h init.c mkinit mknodes \
+	mksyntax nodes.c nodes.h printf.o syntax.c syntax.h token.def \
+	y.tab.c y.tab.h
 
 .depend parser.o: token.def
 
@@ -25,7 +26,7 @@ builtins.h builtins.c: ${.CURDIR}/mkbuiltins ${.CURDIR}/builtins.def
 	cd ${.CURDIR}; sh mkbuiltins ${.OBJDIR}
 
 init.c: mkinit ${SRCS}
-	./mkinit '${CC} -c ${CFLAGS} init.c' ${.ALLSRC:S/^mkinit$//}
+	./mkinit ${.ALLSRC:S/^mkinit$//}
 
 mkinit: ${.CURDIR}/mkinit.c
 	${CC} ${CFLAGS} ${.CURDIR}/mkinit.c -o $@
@@ -42,8 +43,4 @@ syntax.c syntax.h: mksyntax
 mksyntax: ${.CURDIR}/mksyntax.c ${.CURDIR}/parser.h
 	${CC} ${CFLAGS} ${.CURDIR}/mksyntax.c -o $@
 
-arith_lex.o: arith.o
-
-${OBJS}: init.c
-
 .include <bsd.prog.mk>