[build] Require gtk-doc at distcheck time

This should make sure that new tarballs contain the reference
documentation.

https://bugzilla.gnome.org/show_bug.cgi?id=618651

diff --git a/Makefile.am b/Makefile.am
index 15397065f4c855d3160a80a937fba5390f1a61de..22f9812de14367cd4fc2baec2000db4e8d3f96ba 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,6 +20,7 @@ ACLOCAL_AMFLAGS = -I m4
 
 SUBDIRS = girepository giscanner tools gir docs tests examples
 DIST_SUBDIRS = m4 $(SUBDIRS)
+DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
 
 man_MANS =                     \
        docs/g-ir-compiler.1    \