Makefile.m4: Fix dependencies for parallel building.

diff --git a/Makefile.m4 b/Makefile.m4
index 966d846c672dfd36b5f893597155e906aa0bea8b..9ca06e42645c843a6537364d66799c7761c9f860 100644 (file)
--- a/Makefile.m4
+++ b/Makefile.m4
@@ -78,7 +78,8 @@ define(`run_latex', `latex "\def\indexing{n} \nonstopmode \input $<"
 
 $(DVI): gpl.tex $(OBJ) mdwtools.tex
 
-$(OBJ): $(SRC) mdwtools.ins
+$(wordlist 2,$(words $(OBJ)),$(OBJ)): $(firstword $(OBJ))
+$(firstword $(OBJ)): $(SRC) mdwtools.ins
        tex mdwtools.ins
 
 EXTRA_DIST = $(SRC) $(AUX) $(DVI) $(OBJ) $(PS) mdwtools.ins Makefile.m4