[glibmm] Change the ABI to glibmm-2.52.

[Murray Cumming <murrayc src gnome org>]

commit 0ccfdd0cb8502eeee8a2962305764733c3a43e0f
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Nov 10 12:17:31 2016 +0100

    Change the ABI to glibmm-2.52.
    
    This installs in parallel with glibmm-2.4.
    
    There is now corresponding ABI-breaking glib version,
    but there is for gtk+ (and therefore gtkmm), so this seems like a
    good time to do this for glibmm too.

 configure.ac                      |    6 +++---
 docs/Makefile_web.am_fragment     |    6 +++---
 glib/glibmm.h                     |    4 ++--
 glib/glibmm.pc.in                 |    2 +-
 tools/Makefile.am                 |    8 ++++----
 tools/test_scripts/testheaders.sh |    6 +++---
 6 files changed, 16 insertions(+), 16 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 671c13e..5e06253 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@
 ## You should have received a copy of the GNU Lesser General Public License
 ## along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_INIT([glibmm], [2.50.0],
+AC_INIT([glibmm], [2.51.1],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=glibmm],
         [glibmm], [http://www.gtkmm.org/])
 AC_PREREQ([2.59])
@@ -31,8 +31,8 @@ AM_MAINTAINER_MODE
 AC_ARG_VAR([ACLOCAL_FLAGS], [aclocal flags, e.g. -I <macro dir>])
 
 MM_PREREQ([0.9.10])
-MM_INIT_MODULE([glibmm-2.4])
-MM_INIT_MODULE([giomm-2.4])
+MM_INIT_MODULE([glibmm-2.52])
+MM_INIT_MODULE([giomm-2.52])
 
 # Copy the mm-common .pl scripts into docs/,
 # and use them from there,
diff --git a/docs/Makefile_web.am_fragment b/docs/Makefile_web.am_fragment
index 9ac3ad8..e3bdb00 100644
--- a/docs/Makefile_web.am_fragment
+++ b/docs/Makefile_web.am_fragment
@@ -1,8 +1,8 @@
 web_host = gtkmm.org
-web_path_gtkmm = /home/murrayc/gtkmm.org/docs/glibmm-2.4/
-#web_path_gtkmm = /home/groups/g/gt/gtkmm/htdocs/docs/glibmm-2.4/
+web_path_gtkmm = /home/murrayc/gtkmm.org/docs/glibmm-2.52/
+#web_path_gtkmm = /home/groups/g/gt/gtkmm/htdocs/docs/glibmm-2.52/
 web_path_docs = $(web_path_gtkmm)docs/
 rsync_args = -vz --rsh ssh
 
-gtkmm_docdir = $(datadir)/doc/glibmm-2.4/docs
+gtkmm_docdir = $(datadir)/doc/glibmm-2.52/docs
 
diff --git a/glib/glibmm.h b/glib/glibmm.h
index 80b27b5..b82b143 100644
--- a/glib/glibmm.h
+++ b/glib/glibmm.h
@@ -65,12 +65,12 @@
  *
  * If your  source file is @c program.cc, you can compile it with:
  * @code
- * g++ program.cc -o program  `pkg-config --cflags --libs glibmm-2.4 giomm-2.4`
+ * g++ program.cc -o program  `pkg-config --cflags --libs glibmm-2.52 giomm-2.52`
  * @endcode
  *
  * Alternatively, if using autoconf, use the following in @c configure.ac:
  * @code
- * PKG_CHECK_MODULES([GLIBMM], [glibmm-2.4 giomm-2.4])
+ * PKG_CHECK_MODULES([GLIBMM], [glibmm-2.52 giomm-2.52])
  * @endcode
  * Then use the generated @c GLIBMM_CFLAGS and @c GLIBMM_LIBS variables in the
  * project Makefile.am files. For example:
diff --git a/glib/glibmm.pc.in b/glib/glibmm.pc.in
index b08f62d..25e6c16 100644
--- a/glib/glibmm.pc.in
+++ b/glib/glibmm.pc.in
@@ -16,6 +16,6 @@ Name: glibmm
 Description: C++ wrapper for GLib
 Version: @PACKAGE_VERSION@
 URL: http://www.gtkmm.org/
-Requires: gobject-2.0 sigc++-2.0
+Requires: gobject-2.0 sigc++-3.0
 Libs: -L${libdir} -lglibmm-@GLIBMM_API_VERSION@
 Cflags: -I${includedir}/@GLIBMM_MODULE_NAME@ -I${libdir}/@GLIBMM_MODULE_NAME@/include
diff --git a/tools/Makefile.am b/tools/Makefile.am
index af53de8..e0f6818 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -34,16 +34,16 @@ dist_noinst_DATA    = README TODO
 dist_noinst_SCRIPTS = enum.pl
 
 noinst_PROGRAMS = extra_defs_gen/generate_defs_glib extra_defs_gen/generate_defs_gio
-lib_LTLIBRARIES = extra_defs_gen/libglibmm_generate_extra_defs-2.4.la
+lib_LTLIBRARIES = extra_defs_gen/libglibmm_generate_extra_defs-2.52.la
 
 extradefs_includedir      = $(includedir)/$(GLIBMM_MODULE_NAME)/glibmm_generate_extra_defs
 extradefs_include_HEADERS = extra_defs_gen/generate_extra_defs.h
 
 extradefs_ldflags = -no-undefined -version-info $(LIBGLIBMM_SO_VERSION)
 
-extra_defs_gen_libglibmm_generate_extra_defs_2_4_la_SOURCES = extra_defs_gen/generate_extra_defs.cc
-extra_defs_gen_libglibmm_generate_extra_defs_2_4_la_LDFLAGS = $(extradefs_ldflags)
-extra_defs_gen_libglibmm_generate_extra_defs_2_4_la_LIBADD  = $(GLIBMM_LIBS)
+extra_defs_gen_libglibmm_generate_extra_defs_2_52_la_SOURCES = extra_defs_gen/generate_extra_defs.cc
+extra_defs_gen_libglibmm_generate_extra_defs_2_52_la_LDFLAGS = $(extradefs_ldflags)
+extra_defs_gen_libglibmm_generate_extra_defs_2_52_la_LIBADD  = $(GLIBMM_LIBS)
 
 extra_defs_gen_generate_defs_glib_SOURCES = extra_defs_gen/generate_defs_glib.cc
 extra_defs_gen_generate_defs_glib_LDADD   = $(GLIBMM_LIBS) $(lib_LTLIBRARIES)
diff --git a/tools/test_scripts/testheaders.sh b/tools/test_scripts/testheaders.sh
index 150ada4..1c9e274 100755
--- a/tools/test_scripts/testheaders.sh
+++ b/tools/test_scripts/testheaders.sh
@@ -5,9 +5,9 @@
 # files that it depends on.
 
 # Example: In glibmm, go to directory glibmm, and run
-#   tools/test_scripts/testheaders.sh -I glib glibmm-2.4 gio # compile glibmm/gio/giomm/*.h
-#   tools/test_scripts/testheaders.sh glibmm-2.4 glib gio    # compile glibmm/glib/glibmm/*.h and 
glibmm/gio/giomm/*.h
-#   tools/test_scripts/testheaders.sh -I glib -I gio glibmm-2.4 glib/glibmm/ustring.h # compile 
glibmm/glib/glibmm/ustring.h
+#   tools/test_scripts/testheaders.sh -I glib glibmm-2.52 gio # compile glibmm/gio/giomm/*.h
+#   tools/test_scripts/testheaders.sh glibmm-2.52 glib gio    # compile glibmm/glib/glibmm/*.h and 
glibmm/gio/giomm/*.h
+#   tools/test_scripts/testheaders.sh -I glib -I gio glibmm-2.52 glib/glibmm/ustring.h # compile 
glibmm/glib/glibmm/ustring.h
 
 # Usage: testheaders.sh [-I<dir>]... <pkg> [<dir> | <file>]...
 # -I<dir> is added to the g++ command.