[gtkmm-documentation/gtkmm-3-24] Require gtkmm-3.0 >= 3.24.0 and link to gtkmm 3.24

[Kjell Ahlstedt <kjellahl src gnome org>]

commit da4860b4905d850b689c2799e7a910a4b9cc477d
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri Nov 9 15:11:05 2018 +0100

    Require gtkmm-3.0 >= 3.24.0 and link to gtkmm 3.24

 configure.ac                     |  4 ++--
 docs/tutorial/C/index-in.docbook | 13 ++++++++++---
 2 files changed, 12 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0de9728..1fd3bcb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,8 +25,8 @@ MM_AX_CXX_COMPILE_STDCXX([14], [noext], [mandatory])
 AC_PATH_PROG([PERL], [perl], [perl])
 AC_PROG_SED
 
-PKG_CHECK_MODULES([GIOMM], [giomm-2.4 >= 2.50.0])
-PKG_CHECK_MODULES([GTKMM], [gtkmm-3.0 >= 3.22.0])
+PKG_CHECK_MODULES([GIOMM], [giomm-2.4 >= 2.54.0])
+PKG_CHECK_MODULES([GTKMM], [gtkmm-3.0 >= 3.24.0])
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])
 
 # glib-compile-resources and C compiler are needed to generate and compile
diff --git a/docs/tutorial/C/index-in.docbook b/docs/tutorial/C/index-in.docbook
index f83b903..05da0cf 100644
--- a/docs/tutorial/C/index-in.docbook
+++ b/docs/tutorial/C/index-in.docbook
@@ -4,12 +4,12 @@
   <!ENTITY url_refdocs_base_glib_html "http://developer.gnome.org/glibmm/2.58/";>
   <!ENTITY url_refdocs_base_glib "&url_refdocs_base_glib_html;classGlib_1_1">
   <!ENTITY url_refdocs_base_gio "&url_refdocs_base_glib_html;classGio_1_1">
-  <!ENTITY url_refdocs_base_gtk_html "http://developer.gnome.org/gtkmm/3.22/";>
+  <!ENTITY url_refdocs_base_gtk_html "http://developer.gnome.org/gtkmm/3.24/";>
   <!ENTITY url_refdocs_base_gtk "&url_refdocs_base_gtk_html;classGtk_1_1">
   <!ENTITY url_refdocs_base_gtk_namespace "&url_refdocs_base_gtk_html;namespaceGtk_1_1">
   <!ENTITY url_figures_base "figures/">
   <!ENTITY url_examples_base "http://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/";>
-  <!ENTITY url_examples_branchsuffix "gtkmm-3-22">
+  <!ENTITY url_examples_branchsuffix "gtkmm-3-24">
   <!ENTITY gtkmm "<application>gtkmm</application>">
   <!ENTITY uuml "&#252;" >
   <!ENTITY szlig "&#223;" >
@@ -18,6 +18,13 @@
   <!ENTITY nbsp "&#160;" >
 ]>
 
+<!-- At present (2018-11-09) links to git.gnome.org are redirected to the
+corresponding part of gitlab.gnome.org. If url_examples_base is updated to
+point to gitlab.gnome.org, insert_example_code.pl must also be updated.
+The search path after xxx.gnome.org/ is not the same in gitlab.gnome.org
+as in git.gnome.org. /Kjell Ahlstedt
+-->
+
 <!--
 NOTE TO TUTORIAL DOCUMENTATION AUTHORS:
 When referring to the gtkmm project in this document, please use the form
@@ -9416,7 +9423,7 @@ $ jhbuild sanitycheck</screen>
   copying the <ulink url="http://git.gnome.org/browse/mm-common/tree/skeletonmm";>skeleton
   source tree</ulink> from the mm-common module.
 <programlisting>
-  $ git clone git://git.gnome.org/mm-common
+  $ git clone https://gitlab.gnome.org/GNOME/mm-common.git
   $ cp -a mm-common/skeletonmm libsomethingmm
 </programlisting>
 </para>