3 files changed, 5 insertions, 18 deletions
diff --git a/contrib/cube/Makefile b/contrib/cube/Makefile
index 4fd19aac359..dfb0d806e4b 100644
--- a/contrib/cube/Makefile
+++ b/contrib/cube/Makefile
@@ -18,6 +18,8 @@ REGRESS = cube cube_sci
 
 SHLIB_LINK += $(filter -lm, $(LIBS))
 
+EXTRA_CLEAN = cubeparse.h cubeparse.c cubescan.c
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -37,8 +39,3 @@ cubeparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 cubeparse.o cubescan.o: cubeparse.h
-
-distprep: cubeparse.c cubescan.c
-
-maintainer-clean:
-	rm -f cubeparse.h cubeparse.c cubescan.c
diff --git a/contrib/fuzzystrmatch/Makefile b/contrib/fuzzystrmatch/Makefile
index e68bc0e33fd..04c83a34a7b 100644
--- a/contrib/fuzzystrmatch/Makefile
+++ b/contrib/fuzzystrmatch/Makefile
@@ -15,6 +15,8 @@ PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
 REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
+EXTRA_CLEAN = daitch_mokotoff.h
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -31,10 +33,3 @@ daitch_mokotoff.o: daitch_mokotoff.h
 
 daitch_mokotoff.h: daitch_mokotoff_header.pl
 	$(PERL) $< $@
-
-# daitch_mokotoff.h is included in tarballs, so it has to be made by
-# "distprep" and not cleaned except by "maintainer-clean".
-distprep: daitch_mokotoff.h
-
-maintainer-clean:
-	rm -f daitch_mokotoff.h
diff --git a/contrib/seg/Makefile b/contrib/seg/Makefile
index a1e49bf051e..132ec8dbfea 100644
--- a/contrib/seg/Makefile
+++ b/contrib/seg/Makefile
@@ -16,7 +16,7 @@ HEADERS = segdata.h
 
 REGRESS = security seg
 
-EXTRA_CLEAN = y.tab.c y.tab.h
+EXTRA_CLEAN = segparse.h segparse.c segscan.c
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -38,8 +38,3 @@ segparse.c: BISONFLAGS += -d
 
 # Force these dependencies to be known even without dependency info built:
 segparse.o segscan.o: segparse.h
-
-distprep: segparse.c segscan.c
-
-maintainer-clean:
-	rm -f segparse.h segparse.c segscan.c