R fails to build

[andilipa@…]

I was trying to install R, and the installation exits with the following error message.

--- /bin/sh: line 1: gtkdoc-rebase: command not found make[5]: * [install-data-local] Error 127 make[4]: * [install-am] Error 2 make[3]: * [install-recursive] Error 1 make[2]: * [install-recursive] Error 1 make[1]: * [install-recursive] Error 1 make: * [install] Error 2 Error: Target org.macports.destroot returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_glib2/work/glib-2.18.3" && make install DESTDIR=/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_glib2/work/destroot " returned error 2 Command output: -- Installing ./html/glib.html -- Installing ./html/gtester-report.html -- Installing ./html/gtester.html -- Installing ./html/home.png -- Installing ./html/index.html -- Installing ./html/index.sgml -- Installing ./html/ix01.html -- Installing ./html/ix02.html -- Installing ./html/ix03.html -- Installing ./html/ix04.html -- Installing ./html/ix05.html -- Installing ./html/ix06.html -- Installing ./html/ix07.html -- Installing ./html/ix08.html -- Installing ./html/ix09.html -- Installing ./html/ix10.html -- Installing ./html/ix11.html -- Installing ./html/left.png -- Installing ./html/mainloop-states.gif -- Installing ./html/right.png -- Installing ./html/style.css -- Installing ./html/tools.html -- Installing ./html/up.png /bin/sh: line 1: gtkdoc-rebase: command not found make[5]: * [install-data-local] Error 127 make[4]: * [install-am] Error 2 make[3]: * [install-recursive] Error 1 make[2]: * [install-recursive] Error 1 make[1]: * [install-recursive] Error 1 make: * [install] Error 2

Warning: the following items did not execute (for glib2): org.macports.activate org.macports.destroot org.macports.install

--- The Mac OS is 10.4.11