[nautilus-actions] configure.ac: gtk-doc and gnome-doc-utils are no more mandatory packages

[Pierre Wieser <pwieser src gnome org>]

commit 88b54010bbb13e583c688df645e3dc12efe64d9b
Author: Pierre Wieser <pwieser trychlos org>
Date:   Sat Nov 26 17:32:44 2011 +0100

    configure.ac: gtk-doc and gnome-doc-utils are no more mandatory packages
    
    m4_ifdef is not a good way to test if these packages are available, as the
    m4 files default ot be distributed.

 ChangeLog    |    5 +++++
 configure.ac |   17 +++++++----------
 2 files changed, 12 insertions(+), 10 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index d991533..b0152b7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2011-11-26 Pierre Wieser <pwieser trychlos org>
 
+	* configure.ac: gtk-doc and gnome-doc-utils are no more mandatory packages.
+
+	m4_ifdef is not a good way to test if these packages are available, as the
+	m4 files default ot be distributed.
+
 	* Makefile.am: Explicitely disable scrollkeeper here when making distcheck.
 
 2011-11-25 Pierre Wieser <pwieser trychlos org>
diff --git a/configure.ac b/configure.ac
index a352f16..d931719 100644
--- a/configure.ac
+++ b/configure.ac
@@ -151,24 +151,21 @@ AC_SUBST([NAUTILUS_ACTIONS_CFLAGS])
 AC_SUBST([NAUTILUS_ACTIONS_LIBS])
 
 # check for gtk-doc
+# - starting with N-A 3.1.5, gtk-doc is no more required when one want compile
+#   the tarball distribution (i.e. without regenerating reference manuals)
 # - starting with gtk-doc 1.15, multiple source dirs are directly handled
 #   by gtk-doc.make
 # - API documentation should not be built (would be incomplete) when deprecated
 #   symbols are not enabled
-m4_ifdef([GTK_DOC_CHECK], [
 GTK_DOC_CHECK([1.15],[--flavour no-tmpl])
-],[
-AM_CONDITIONAL([ENABLE_GTK_DOC], false)
-])
-if test "x${enable_gtk_doc}" = "xyes" -a "${enable_deprecated}" = "no"; then
+if test "${enable_gtk_doc}" = "yes" -a "${enable_deprecated}" = "no"; then
 	AC_MSG_WARN([API documentation will be incomplete as deprecated symbols are disabled])
 fi
 
-m4_ifdef([GNOME_DOC_INIT], [
-GNOME_DOC_INIT
-][
-AM_CONDITIONAL([HAVE_GNOME_DOC_UTILS], false)
-])
+# check for gnome-doc-utils
+# - starting with N-A 3.1.5, gnome-doc-utils is no more required when one want
+#   compile the tarball distribution (i.e. without regenerating users's manuals)
+GNOME_DOC_INIT(,,[gdu_cv_have_gdu=no])
 
 # defines log domains when in maintainer mode
 NA_LOG_DOMAINS