combine rules nfc

diff --git a/Makefile b/Makefile
index d60ee07e5ecb6bcba8224428c7d787acaac35984..b921966b25d30e2bf8264b84b8faa092c2642747 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -112,11 +112,8 @@ slides.ps: $(SLIDEFILES) Makefile
 slides.pdf:     slides.ps Makefile
        ps2pdf $< $@
 
-talk.ps: talk.txt
-       a2ps -1 -o $@ -B talk.txt
-
-demo.ps: demo.txt
-       a2ps -1 -o $@ -B demo.txt
+talk.ps demo.ps: %.ps: %.txt Makefile
+       a2ps -1 -o $@ -B $<
 
 install: slides.pdf talk.txt
        rsync -vP $^ ijackson@chiark:public-html/2018/debconf-gdr-talk/