the version in git master of today.
hereunder you can find the log

...
Making install in geglmm
make[2]: Entering directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm'
Making install in private
make[3]: Entering directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm/private'
make[4]: Entering directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm/private'
make[4]: Nothing to be done for `install-exec-am'.
test -z "/opt/gnome/include/geglmm-1.0/geglmm/private" || /bin/mkdir -p "/opt/gnome/include/geglmm-1.0/geglmm/private"
 /home/baptiste/.local/bin/install-check -m 644 rectangle_p.h node_p.h processor_p.h buffer_p.h curve_p.h color_p.h operation_p.h path_p.h matrix3_p.h '/opt/gnome/include/geglmm-1.0/geglmm/private'
make[4]: Leaving directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm/private'
make[3]: Leaving directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm/private'
make[3]: Entering directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm'
make[4]: Entering directory `/home/baptiste/checkout/gnome2/geglmm/gegl/geglmm'
test -z "/opt/gnome/lib" || /bin/mkdir -p "/opt/gnome/lib"
test -z "/opt/gnome/include/geglmm-1.0/geglmm" || /bin/mkdir -p "/opt/gnome/include/geglmm-1.0/geglmm"
 /home/baptiste/.local/bin/install-check -m 644 rectangle.h node.h processor.h buffer.h curve.h color.h operation.h path.h matrix3.h wrap_init.h init.h wrap_init.h '/opt/gnome/include/geglmm-1.0/geglmm'
 /bin/bash ../../libtool   --mode=install /home/baptiste/.local/bin/install-check   libgeglmm.la '/opt/gnome/lib'
install: will not overwrite just-created `/opt/gnome/include/geglmm-1.0/geglmm/wrap_init.h' with `wrap_init.h'
make[4]: *** [install-sublib_includeHEADERS] Error 1
make[4]: *** Waiting for unfinished jobs....
libtool: install: /home/baptiste/.local/bin/install-check .libs/libgeglmm.so.3.0.0 /opt/gnome/lib/libgeglmm.so.3.0.0
libtool: install: (cd /opt/gnome/lib && { ln -s -f libgeglmm.so.3.0.0 libgeglmm.so.3 || { rm -f libgeglmm.so.3 && ln -s libgeglmm.so.3.0.0 libgeglmm.so.3; }; })
libtool: install: (cd /opt/gnome/lib && { ln -s -f libgeglmm.so.3.0.0 libgeglmm.so || { rm -f libgeglmm.so && ln -s libgeglmm.so.3.0.0 libgeglmm.so; }; })
libtool: install: /home/baptiste/.local/bin/install-check .libs/libgeglmm.lai /opt/gnome/lib/libgeglmm.la
libtool: finish: PATH="/opt/gnome/bin:/home/baptiste/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/baptiste/.local/bin:/sbin" ldconfig -n /opt/gnome/lib
...