Optionally call bibtex if .bib file exists

diff --git a/Makefile b/Makefile
index 56bb33d69525fb0294df290b181243dc6fa74210..cc266dbfd2c76fb26a12750460bdf4fc7dd99423 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,7 @@ FAKEROOT=`[ -x /usr/bin/fakeroot ] && echo /usr/bin/fakeroot`
        $(LATEX) $<
 
 %.dvi: %.sty %.dtx %.ind
+       [ ! -f $*.bib ] || bibtex $*.aux
        $(LATEX) $*.dtx
        $(LATEX) $*.dtx