Makefile.m4: Fix rules to be parallel-make safe.

But unfortunately not portable beyond GNU Make.

diff --git a/Makefile.m4 b/Makefile.m4
index 0140fbc..e3db7b3 100644 (file)
--- a/Makefile.m4
+++ b/Makefile.m4
@@ -82,9 +82,11 @@ $(DVI) $(PDF): $(AUX) $(INS)
 .vpl.vf:; vptovf $<
 clean-local::; rm -rf t.*/
 
-$(ETX) $(MAP) $(INS): $(SRC) mdwfonts.ins
+$(wordlist 2,$(words $(ETX)),$(ETX)) $(MAP) $(INS): $(firstword $(ETX))
+$(firstword $(ETX)): $(SRC) mdwfonts.ins
        tex "\nonstopmode \input mdwfonts.ins"
-$(FD) $(VF) $(PL) $(VPL): mdwfonts.tex $(ETX)
+$(wordlist 2,$(words $(FD)),$(FD)) $(VF) $(PL) $(VPL): $(firstword $(FD))
+$(firstword $(FD)): mdwfonts.tex $(ETX)
        $(FONTINST) "\nonstopmode \input mdwfonts.tex"
 
 EXTRA_DIST = \