[build] Fix `make pdf' for out of the source (auto* tools) build.

diff --git a/doc/reference/Makefile.am b/doc/reference/Makefile.am
index 91d6178c6980dce4fdcf2ec59212c1feb7ea9a79..445eeb729a4535d2a8e74836435326d89d6189dc 100644 (file)
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -53,7 +53,7 @@ pdflatex/reference.pdf: pdflatex/reference.tex
                cd pdflatex; \
          ${PDFLATEX} reference.tex ;\
          ${MAKEINDEX} reference.idx ;\
-         ${PYTHON} $(top_srcdir)/scripts/fixupind.py reference.ind; \
+         ${PYTHON} $(abs_top_srcdir)/scripts/fixupind.py reference.ind; \
          ${PDFLATEX} reference.tex
 
 reference.dvi: latex latex/reference.dvi