[goocanvasmm] Use C++11 and the latest gtkmm.

[Murray Cumming <murrayc src gnome org>]

commit 4a1b25c99e88258c5d3b022ca72d385cb64aedeb
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Jul 29 13:57:26 2015 +0200

    Use C++11 and the latest gtkmm.
    
    Because glibmm and gtkmm now require C++11 and gmmproc (from glibmm)
    now generates C++11 code.

 configure.ac |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 573a616..abc750a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,11 +39,14 @@ MM_CONFIG_DOCTOOL_DIR([doc])
 AC_SUBST([GOOCANVASMM_SO_VERSION], [6:0:0])
 
 AC_PROG_CXX
+
+MM_AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
+
 AC_DISABLE_STATIC
 AC_LIBTOOL_WIN32_DLL
 AC_PROG_LIBTOOL
 
-AC_SUBST([GOOCANVASMM_MODULES], ['glibmm-2.4 >= 2.14.2 gtkmm-3.0 >= 2.91.3 goocanvas-2.0 >= 2.0.1'])
+AC_SUBST([GOOCANVASMM_MODULES], ['glibmm-2.4 >= 2.45.41 gtkmm-3.0 >= 3.17.50 goocanvas-2.0 >= 2.0.1'])
 PKG_CHECK_MODULES([GOOCANVASMM], [$GOOCANVASMM_MODULES])
 
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])