glib-2.20.4 install error

[Janos Dohanics]

I have been trying to upgrade glib20 and gio-fam-backend and get this error:

test -z "/usr/local/bin" || .././install-sh -c -d "/usr/local/bin"
  /bin/sh /usr/local/bin/libtool   --mode=install install  -s -o root -g 
wheel -m 555 gtester '/usr/local/bin'
libtool: install: invalid libtool wrapper script `gtester'
gmake[5]: *** [install-binPROGRAMS] Error 1
gmake[5]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.20.4/glib'
gmake[4]: *** [install-am] Error 2
gmake[4]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.20.4/glib'
gmake[3]: *** [install-recursive] Error 1
gmake[3]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.20.4/glib'
gmake[2]: *** [install] Error 2
gmake[2]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.20.4/glib'
gmake[1]: *** [install-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/devel/glib20/work/glib-2.20.4'
gmake: *** [install] Error 2
*** Error code 2

Stop in /usr/ports/devel/glib20.
*** Error code 1

Stop in /usr/ports/devel/glib20.
*** Error code 1

Would you please advise how to fix this.

-- 
Janos Dohanics