[ekiga] Fix gdu build option

[Eugen Dedu <ededu src gnome org>]

commit 082121f5a4d76d04b572cc1975e0d418066fdf39
Author: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
Date:   Sun Jan 16 00:08:01 2011 +0100

    Fix gdu build option
    
    scrollkeeper package is not mandatory anymore, if it does not exist
    gdu is simply disabled.  Also, if gnome-doc-utils is not installed,
    disable gdu (see
    http://mail.gnome.org/archives/ekiga-list/2010-November/msg00071.html).

 configure.ac |   18 +++++++-----------
 1 files changed, 7 insertions(+), 11 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 64bde61..7bc6f72 100644
--- a/configure.ac
+++ b/configure.ac
@@ -663,24 +663,19 @@ AM_CONDITIONAL(HAVE_LOUDMOUTH, test "x$found_loudmouth" = "xyes")
 dnl ###############################
 dnl   Gnome-Doc-Utils
 dnl ###############################
-GDU="disabled"
-if test "x${gm_platform}" = "xmingw" ; then
-  GNOME_DOC_INIT_ARG=:
-fi
-
-GNOME_DOC_INIT(,,[$GNOME_DOC_INIT_ARG])
 if test "x${gm_platform}" != "xmingw" ; then
-  AC_ARG_ENABLE(gdu, AS_HELP_STRING([--enable-gdu],[enable GNOME-Doc-Utils support (default is enabled)]),
+  GDU="disabled"
+  AC_ARG_ENABLE(gdu, AS_HELP_STRING([--enable-gdu],[enable GNOME-Doc-Utils support, i.e. help file generation (default is enabled)]),
 [if test "x$enableval" = "xyes"; then
   enable_gdu=yes
 fi],enable_gdu=yes)
   if test "x$enable_gdu" = "xyes"; then
     AC_PATH_PROG(SK_CONFIG,scrollkeeper-config,no)
-    if test "x$SK_CONFIG" = "xno"; then
-      AC_MSG_ERROR([Could not find scrollkeeper-config. Please install the scrollkeeper package: http://scrollkeeper.sourceforge.net])
+    GNOME_DOC_INIT(,,[GDI=no])
+    if test "x$SK_CONFIG" != "xno" -a "x$GDI" != "xno"; then
+      GDU="enabled"
+      AC_DEFINE(HAVE_GNOME_DOC_UTILS,1,[GNOME-Doc-Utils support])
     fi
-    GDU="enabled"
-    AC_DEFINE(HAVE_GNOME_DOC_UTILS,1,[GNOME-Doc-Utils support])
   fi
 fi
 
@@ -870,6 +865,7 @@ echo "================ Final configuration ==================="
 echo "          Installing into prefix  :  $prefix"
 echo ""
 if test "x${gm_platform}" != "xmingw" ; then
+echo "                     GDU support  :  $GDU"
 echo "                   GConf support  :  $GCONF"
 echo "   Evolution-Data-Server support  :  $EDS"
 echo "                  NOTIFY support  :  $NOTIFY"