Makefile.am: Fix 'make doc' for out-of-tree builds.

diff --git a/Makefile.am b/Makefile.am
index ee562d05338e637d31f102e5fa31f49516201d9c..7988bc696ebd6e55825deb7936fa3b79c2060523 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -44,5 +44,5 @@ ChangeLog:
 
 dist-hook: ChangeLog
 
-doc: $(library_include_HEADERS) Doxyfile
-       doxygen
+doc: $(library_include_HEADERS) $(top_srcdir)/Doxyfile
+       doxygen $(top_srcdir)/Doxyfile