[pango] Fix docs build on Ubuntu

[Behdad Esfahbod <behdad src gnome org>]

commit 837f1bae095f90c662fdc51fd39a0eeb2bb8f850
Author: Behdad Esfahbod <behdad behdad org>
Date:   Tue Sep 21 15:53:52 2010 -0400

    Fix docs build on Ubuntu
    
    I'm guessing that Ubuntu has broken libtool by not automatically adding
    dependent libraries from the .la file...

 docs/Makefile.am |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/docs/Makefile.am b/docs/Makefile.am
index 9e5b606..28f7626 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -57,13 +57,15 @@ INCLUDES =               	\
 	$(FREETYPE_CFLAGS)	\
 	$(X_CFLAGS)
 
-# libpangoxft.la and/or libpangocairo.la pull in libpango.la
-# and libpangoft2.la;
 # We're assuming here that we'll only regenerate the
 # HTML docs on Unix. We don't get introspection on Win32
 # specific types, but that isn't a big deal.
 
-GTKDOC_LIBS =
+GTKDOC_LIBS = $(top_builddir)/pango/libpango-1.0.la
+
+if HAVE_FREETYPE
+GTKDOC_LIBS += $(top_builddir)/pango/libpangoft2-1.0.la
+endif
 
 if HAVE_XFT
 GTKDOC_LIBS += $(top_builddir)/pango/libpangoxft-1.0.la