Add a gitignore make target.

mk/depend.mk

@@ -4,6 +4,7 @@
 # Copyright 2008 Roy Marples <roy@marples.name>
 
 CLEANFILES+=	.depend
+IGNOREFILES+=	.depend
 
 .depend: ${SRCS}
 	${CC} ${CFLAGS} -MM ${SRCS} > .depend

mk/gitignore.mk

@@ -0,0 +1,15 @@
+# rules to make .gitignore files
+# Copyright 2008 Roy Marples <roy@marples.name>
+
+IGNOREFILES+=	${CLEANFILES}
+
+.gitignore:
+	for obj in ${IGNOREFILES}; do \
+		if ! test -r .gitignore; then \
+			echo "$${obj}" > .gitignore || exit $$?; \
+		elif ! grep -q "^$${obj}$$" .gitignore; then \
+			echo "$${obj}" >> .gitignore || exit $$?; \
+		fi; \
+	done
+
+gitignore: .gitignore

mk/lib.mk

@@ -11,6 +11,8 @@ OBJS+=			${SRCS:.c=.o}
 SOBJS+=			${OBJS:.o=.So}
 _LIBS=			lib${LIB}.a ${SHLIB_NAME}
 
+CLEANFILES+=		${OBJS} ${SOBJS} ${_LIBS} ${SHLIB_LINK}
+
 .SUFFIXES:		.So
 
 .c.So:
@@ -50,3 +52,4 @@ clean:
 
 include ${MK}/sys.mk
 include ${MK}/depend.mk
+include ${MK}/gitignore.mk

mk/prog.mk

@@ -20,12 +20,15 @@ LDFLAGS+=		${_DYNLINK}$(shell ${_DYNLINK_SH})
 LDFLAGS+=		-Wl,-rpath=${PREFIX}/${LIBNAME} -L${PREFIX}/${LIBNAME}
 LDFLAGS+=		${PROGLDFLAGS}
 
+CLEANFILES+=		${OBJS} ${PROG}
+
 all: depend ${PROG}
 
 ${PROG}: ${SCRIPTS} ${OBJS}
 	${CC} ${LDFLAGS} -o $@ ${OBJS} ${LDADD}
 
 clean:
-	rm -f ${OBJS} ${PROG} ${CLEANFILES}
+	rm -f ${CLEANFILES}
 
 include ${MK}/depend.mk
+include ${MK}/gitignore.mk

mk/scripts.mk

@@ -41,3 +41,5 @@ install: all realinstall ${INSTALLAFTER}
 CLEANFILES+=	${OBJS}
 clean:
 	if test -n "${CLEANFILES}"; then rm -f ${CLEANFILES}; fi 
+
+include ${MK}/gitignore.mk

mk/subdir.mk

@@ -37,3 +37,5 @@ realinstall:
 install: realinstall ${INSTALLAFTER}
 depend:
 	${_SUBDIR}
+gitignore:
+	${_SUBDIR}