Building gnome-settings-daemon-2.26.1 on OS X 10.4 with apple's X11 and all
gnome support libs supplied by Fink at the level of GNOME2.26 fails:

/bin/sh ../../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../..  -I../../gnome-settings-daemon -DGNOME_SETTINGS_LOCALEDIR=\""/sw/share/locale"\"  -I/sw/lib/fontconfig2/include -I/sw/include -I/sw/include  -I/usr/X11R6/include -I/sw/include  -I/usr/X11R6/include -I/sw/include  -I/usr/X11R6/include -I/sw/lib/fontconfig2/include -I/sw/include/gtk-2.0 -I/sw/lib/gtk-2.0/include -I/sw/include/atk-1.0 -I/sw/include/cairo -I/sw/include/pango-1.0 -I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include -I/sw/include/pixman-1 -I/sw/include/freetype2 -I/sw/include -I/sw/include/libpng12 -I/sw/include/gconf/2 -I/sw/include/orbit-2.0 -I/sw/include/dbus-1.0 -I/sw/lib/dbus-1.0/include -I/sw/include/gnome-desktop-2.0 -I/sw/include/startup-notification-1.0 -I/sw/include/libglade-2.0 -I/sw/include/libxml2 -I/usr/X11R6/include -I/usr/X11/include -DORBIT2=1   -Os -pipe -c -o libmouse_la-gsd-mouse-manager.lo `test -f 'gsd-mouse-manager.c' || echo './'`gsd-mouse-manager.c
 gcc -DHAVE_CONFIG_H -I. -I../.. -I../../gnome-settings-daemon -DGNOME_SETTINGS_LOCALEDIR=\"/sw/share/locale\" -I/sw/lib/fontconfig2/include -I/sw/include -I/sw/include -I/usr/X11R6/include -I/sw/include -I/usr/X11R6/include -I/sw/include -I/usr/X11R6/include -I/sw/lib/fontconfig2/include -I/sw/include/gtk-2.0 -I/sw/lib/gtk-2.0/include -I/sw/include/atk-1.0 -I/sw/include/cairo -I/sw/include/pango-1.0 -I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include -I/sw/include/pixman-1 -I/sw/include/freetype2 -I/sw/include -I/sw/include/libpng12 -I/sw/include/gconf/2 -I/sw/include/orbit-2.0 -I/sw/include/dbus-1.0 -I/sw/lib/dbus-1.0/include -I/sw/include/gnome-desktop-2.0 -I/sw/include/startup-notification-1.0 -I/sw/include/libglade-2.0 -I/sw/include/libxml2 -I/usr/X11R6/include -I/usr/X11/include -DORBIT2=1 -Os -pipe -c gsd-mouse-manager.c  -fno-common -DPIC -o .libs/libmouse_la-gsd-mouse-manager.o
gsd-mouse-manager.c: In function 'devicepresence_filter':
gsd-mouse-manager.c:322: error: 'XDevicePresenceNotifyEvent' undeclared (first use in this function)
gsd-mouse-manager.c:322: error: (Each undeclared identifier is reported only once
gsd-mouse-manager.c:322: error: for each function it appears in.)
gsd-mouse-manager.c:322: error: 'dpn' undeclared (first use in this function)
gsd-mouse-manager.c:322: error: parse error before ')' token
gsd-mouse-manager.c:323: error: 'DeviceEnabled' undeclared (first use in this function)
make[3]: *** [libmouse_la-gsd-mouse-manager.lo] Error 1


configure correctly found that I do have have XInput:

checking for XListInputDevices in -lXi... yes
checking for X11/extensions/XInput.h... yes

but the XDevicePresenceNotifyEvent struct and associated functionality was only introduced in very recent versions of XInput. I don't know "how very recent", but I see reports of this same symptom (from different package) on "whatever X11 comes with SLES 10".

If gsd-mouse-manager.c requires this functionality, need to autoconf test for it to make sure XInput is new enough rather than (or in addition to) the long-existing XListInputDeviceswhat symbol. I don't know anything about this feature (in x11 or as used by g-s-d) so I don't know if there can be an alternative implementation using older XInput or if the parts of gsd-mouse-manager.c can be disabled piecewise (i.e., if "have xinput but it's old"), or if it's easiest just to disable xinput use entirely unless it's new enough.