[glibmm/sigc3v2: 2/7] Try to disable -Wunused-function for the glibmm_interface_move test.

[Murray Cumming <murrayc src gnome org>]

commit eb059a555103c4557e7a710872f0311e2de518b0
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 2 09:14:28 2016 +0100

    Try to disable -Wunused-function for the glibmm_interface_move test.
    
    To deal with this clang warning when building with --enable-warnings=fatal.
    TODO: However, this doesn't actually seem to disable the error.
    
    glibmm_interface_move/main.cc:9:1: error: unused function 'glib_autoptr_cleanup_TestIface' 
[-Werror,-Wunused-function]
    G_DECLARE_INTERFACE(TestIface, test_Iface, TEST, IFACE, GObject)
    ^
    /opt/gnome/include/glib-2.0/gobject/gtype.h:1565:3: note: expanded from macro 'G_DECLARE_INTERFACE'
      _GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, PrerequisiteName)                                          
 \
      ^
    /opt/gnome/include/glib-2.0/glib/gmacros.h:421:22: note: expanded from macro 
'_GLIB_DEFINE_AUTOPTR_CHAINUP'
      static inline void _GLIB_AUTOPTR_FUNC_NAME(ModuleObjName) (ModuleObjName **_ptr) {                     \
                         ^
    /opt/gnome/include/glib-2.0/glib/gmacros.h:415:43: note: expanded from macro '_GLIB_AUTOPTR_FUNC_NAME'
                                              ^
    <scratch space>:224:1: note: expanded from here
    glib_autoptr_cleanup_TestIface

 configure.ac      |    8 +++++++-
 tests/Makefile.am |    5 ++++-
 2 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c575000..ba3281f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -114,10 +114,16 @@ MM_ARG_WITH_TAGFILE_DOC([libsigc++-2.0.tag], [sigc++-2.0])
 # Check whether --enable-debug-refcounting was given.
 GLIBMM_ARG_ENABLE_DEBUG_REFCOUNTING
 
+glibmm_warnings_fatal='-pedantic -Wall -Wextra -Wformat-security -Wsuggest-override -Wshadow -Wno-long-long'
 # Evaluate the --enable-warnings=level option.
 MM_ARG_ENABLE_WARNINGS([GLIBMM_WXXFLAGS],
                        [-Wall],
-                       [-pedantic -Wall -Wextra -Wformat-security -Wsuggest-override -Wshadow 
-Wno-long-long],
+                       [$glibmm_warnings_fatal],
+                       [G SIGCXX])
+
+MM_ARG_ENABLE_WARNINGS([GLIBMM_INTERFACE_TEST_WXXFLAGS],
+                       [-Wall],
+                       [$glibmm_warnings_fatal -Wno-unused-function],
                        [G SIGCXX])
 
 # Offer the ability to omit some API from the library,
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b2dddc3..0268c11 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -55,8 +55,9 @@ glibmm_includes = -I$(top_builddir)/glib $(if $(srcdir:.=),-I$(top_srcdir)/glib)
 giomm_includes  = -I$(top_builddir)/gio $(if $(srcdir:.=),-I$(top_srcdir)/gio)
 local_cppflags  = -I$(top_builddir) $(glibmm_includes) $(giomm_includes)
 
+cxxflags_disable_deprecated = $(GLIBMM_WXXFLAGS) -DGLIBMM_DISABLE_DEPRECATED -DGIOMM_DISABLE_DEPRECATED
 AM_CPPFLAGS = $(local_cppflags) $(GIOMM_CFLAGS)
-AM_CXXFLAGS = $(GLIBMM_WXXFLAGS) -DGLIBMM_DISABLE_DEPRECATED -DGIOMM_DISABLE_DEPRECATED
+AM_CXXFLAGS = $(GLIBMM_WXXFLAGS) $(cxxflags_disable_deprecated)
 
 
 local_libglibmm = $(top_builddir)/glib/glibmm/libglibmm-$(GLIBMM_API_VERSION).la
@@ -92,6 +93,8 @@ glibmm_interface_implementation_test_SOURCES = glibmm_interface_implementation/m
 glibmm_interface_implementation_test_LDADD = $(giomm_ldadd)
 
 glibmm_interface_move_test_SOURCES       = glibmm_interface_move/main.cc
+glibmm_interface_move_test_CXXFLAGS = $(GLIBMM_INTERFACE_TEST_WXXFLAGS) $(cxxflags_disable_deprecated)
+
 glibmm_mainloop_test_SOURCES             = glibmm_mainloop/main.cc
 glibmm_nodetree_test_SOURCES             = glibmm_nodetree/main.cc
 glibmm_object_move_test_SOURCES          = glibmm_object_move/main.cc