gconf @2.32.4_2 (gnome) Build error @ OSX 10.6.8 with Xcode 4.2

[namektds (Daisuke Namekata)]

The build of gconf 2.32.4_2 was failed at the building step.

--->  Building gconf
make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_gconf/gconf/work/GConf-2
/usr/bin/make  all-recursive
make[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_gconf/gconf/work/GCon
Making all in gconf
make[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_gconf/gconf/work/GCon
/opt/local/bin/orbit-idl-2 ./GConfX.idl
/opt/local/bin/orbit-idl-2 ./GConfX.idl
orbit-idl-2 2.14.19 compiling
  mode, hide preprocessor errors, passes: stubs skels common headers

Processing file ./GConfX.idl
orbit-idl-2 2.14.19 compiling
  mode, hide preprocessor errors, passes: stubs skels common headers

Processing file ./GConfX.idl
Error: Empty file

** (orbit-idl-2:26137): WARNING **: ./GConfX.idl compilation failed
make[2]: *** [GConfX-skels.c] Error 1
make[2]: *** Waiting for unfinished jobs....
Error: Empty file

** (orbit-idl-2:26136): WARNING **: ./GConfX.idl compilation failed

I use MacPorts version 2.2.0. I attach to the log file that records the output of 'sudo port -v install gconf'.

Following this site (​https://trac.macports.org/wiki/ProblemHotlist), I also executed the following commands:

sudo port clean gconf
sudo port install gconf configure.compiler=llvm-gcc-4.2

However, the problem was not solved.