diff -r 29f09a778037 -r 5cd3396802f5 doc-src/Logics/Makefile
--- a/doc-src/Logics/Makefile	Thu Sep 24 15:23:47 1998 +0200
+++ b/doc-src/Logics/Makefile	Thu Sep 24 15:36:16 1998 +0200
@@ -10,7 +10,7 @@
 	 ../rail.sty ../proof.sty ../iman.sty ../extra.sty
 
 logics.dvi.gz:   $(FILES) 
-	@ln -sf ../gfx/isabelle.eps .
+	test -r isabelle.eps || ln -s ../gfx/isabelle.eps .
 	-rm logics.dvi*
 	latex logics
 	rail logics
@@ -22,7 +22,7 @@
 	gzip -f logics.dvi
 
 dist:   $(FILES) 
-	@ln -sf ../gfx/isabelle.eps .
+	test -r isabelle.eps || ln -s ../gfx/isabelle.eps .
 	-rm logics.dvi*
 	latex logics
 	latex logics