diff --git a/Makefile b/Makefile
index fa4b0e2..65ad220 100644
--- a/Makefile
+++ b/Makefile
@@ -5,29 +5,17 @@ BIN=/usr/local/bin
 INSTALL=install
 CC=gcc
 
+SUBDIRS=config11 converters crossassemblers extracters
+
 .PHONY: all clean install uninstall
 
 # Omitted: putr: has no sources.
 all:
-	cd config11 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd converters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd crossassemblers && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd extracters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"; \
+	done
 
-clean:
-	cd config11 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd converters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd crossassemblers && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd extracters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-
-install:
-	cd config11 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd converters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd crossassemblers && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd extracters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-
-uninstall:
-	cd config11 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd converters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd crossassemblers && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd extracters && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
+clean install uninstall:
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" $@; \
+	done
diff --git a/converters/Makefile b/converters/Makefile
index db039bd..95c5022 100644
--- a/converters/Makefile
+++ b/converters/Makefile
@@ -5,92 +5,17 @@ BIN=/usr/local/bin
 INSTALL=install
 CC=gcc
 
+SUBDIRS=asc cosy decsys dtos8cvt gt7cvt hpconvert indent littcvt m8376 mksimtape mt2tpc mtcvt23 \
+	mtcvtfix mtcvtodd noff sfmtcvt strrem strsub tar2mt tp512cvt tpc2mt
+
 .PHONY: all clean install uninstall
 
 all:
-	cd asc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd cosy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd dtos8cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd hpconvert && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd littcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mksimtape && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mt2tpc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mtcvtfix && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd noff && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd strrem && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd tar2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd tpc2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd decsys && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd gt7cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd indent && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd m8376 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mtcvt23 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mtcvtodd && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd sfmtcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd strsub && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd tp512cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"; \
+	done
 
-clean:
-	cd asc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd dtos8cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd hpconvert && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd littcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mt2tpc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mtcvtfix && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd noff && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd strrem && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd tar2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd tpc2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd decsys && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd gt7cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd indent && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd m8376 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mtcvt23 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mtcvtodd && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd sfmtcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd strsub && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd tp512cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-
-install:
-	cd asc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd cosy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd dtos8cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd hpconvert && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd littcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mt2tpc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mtcvtfix && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd noff && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd strrem && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd tar2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd tpc2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd decsys && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd gt7cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd indent && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd m8376 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mtcvt23 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mtcvtodd && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd sfmtcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd strsub && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd tp512cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-
-uninstall:
-	cd asc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd cosy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd dtos8cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd hpconvert && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd littcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mt2tpc && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mtcvtfix && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd noff && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd strrem && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd tar2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd tpc2mt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd decsys && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd gt7cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd indent && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd m8376 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mtcvt23 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mtcvtodd && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd sfmtcvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd strsub && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd tp512cvt && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
+clean install uninstall:
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" $@; \
+	done
diff --git a/crossassemblers/Makefile b/crossassemblers/Makefile
index 18cf775..a9be766 100644
--- a/crossassemblers/Makefile
+++ b/crossassemblers/Makefile
@@ -5,29 +5,17 @@ BIN=/usr/local/bin
 INSTALL=install
 CC=gcc
 
+SUBDIRS=hpasm macro1 macro7 macro8x
+
 .PHONY: all clean install uninstall
 
 # Omitted: macro11: needs more complicated Makefiles.
 all:
-	cd hpasm && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd macro1 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd macro7 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd macro8x && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"; \
+	done
 
-clean:
-	cd hpasm && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd macro1 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd macro7 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd macro8x && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-
-install:
-	cd hpasm && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd macro1 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd macro7 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd macro8x && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-
-uninstall:
-	cd hpasm && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd macro1 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd macro7 && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd macro8x && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
+clean install uninstall:
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" $@; \
+	done
diff --git a/extracters/Makefile b/extracters/Makefile
index 272287c..f551f8a 100644
--- a/extracters/Makefile
+++ b/extracters/Makefile
@@ -5,53 +5,17 @@ BIN=/usr/local/bin
 INSTALL=install
 CC=gcc
 
+SUBDIRS=backup ckabstape cpytap dbtap mmdir mtdump ods2 rawcopy rawtap rstsflx sdsdump tpdump
+
 .PHONY: all clean install uninstall
 
 # Omitted: backup, ods2: need more complicated Makefiles.
 all:
-	cd ckabstape && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd cpytap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd dbtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mmdir && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd mtdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd rawcopy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd rawtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd rstsflx && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd sdsdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
-	cd tpdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)"; \
+	done
 
-clean:
-	cd ckabstape && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd cpytap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd dbtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mmdir && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd mtdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd rawcopy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd rawtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd rstsflx && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd sdsdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-	cd tpdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" clean
-
-install:
-	cd ckabstape && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd cpytap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd dbtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mmdir && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd mtdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd rawcopy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd rawtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd rstsflx && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd sdsdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-	cd tpdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" install
-
-uninstall:
-	cd ckabstape && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd cpytap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd dbtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mmdir && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd mtdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd rawcopy && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd rawtap && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd rstsflx && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd sdsdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
-	cd tpdump && $(MAKE) CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" uninstall
+clean install uninstall:
+	for subdir in $(SUBDIRS); do \
+		$(MAKE) -C $$subdir CFLAGS="$(CFLAGS)" BIN="$(BIN)" INSTALL="$(INSTALL)" CC="$(CC)" $@; \
+	done