build/HACKING: add check for pandoc and update make rule for HACKING.pdf
diff --git a/Makefile.am b/Makefile.am
index b485bc8..3c3b65e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -13,10 +13,10 @@
 	vtysh/Makefile.in vtysh/Makefile.am \
 	tools/zebra.el tools/multiple-bgpd.sh
 
-if HAVE_LATEX
+if HAVE_PANDOC
 
-HACKING.pdf: HACKING.tex
-	$(LATEXMK) -pdf $<
+HACKING.pdf: HACKING.md
+	pandoc -o $@ $<
 
 clean-local:
 	-$(LATEXMK) -C HACKING.tex