docs: enable parallel build of subdirectories

We can build gtk docs, ADM, PWG and FAQ in parallel.

diff --git a/docs/Makefile.am b/docs/Makefile.am
index 3f07d58..c39b789 100644 (file)
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -26,3 +26,6 @@ EXTRA_DIST = \
 upload:
        @if test "x$(SUBDIRS)" != x; then for a in $(SUBDIRS); do cd $$a; make upload; cd ..; done; fi
 
+libs: gst
+
+include $(top_srcdir)/common/parallel-subdirs.mak