qt4-mac 4.6 build failure

[macsforever2000@…]

Mac OS X 10.6.2. Xcode 3.2.1.

I am not able to build qt4-mac 4.6 on at least 2 machines. I am upgrading from version 4.5.3.

$ port installed qt4-mac
The following ports are currently installed:
  qt4-mac @4.5.3_1+darwin_10 (active)

Here is the error from the log:

:info:build /usr/bin/g++-4.2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -arch -Xarch_x86_64 -mmacosx-version-min=10.5 -o ../../../bin/moc release-shared/moc.o release-shared/preprocessor.o release-shared/generator.o release-shared/parser.o release-shared/token.o release-shared/main.o    -L/opt/local/lib -L/opt/local/var/macports/build/_opt_mports_trunk_dports_aqua_qt4-mac/work/qt-everywhere-opensource-src-4.6.0/src/tools/bootstrap -lbootstrap -L/opt/local/lib -lz -framework CoreServices 
:info:build g++-4.2: Invalid arch name : -Xarch_x86_64
:info:build make[1]: *** [../../../bin/moc] Error 1
:info:build make: *** [sub-moc-make_default-ordered] Error 2
:info:build shell command " cd "/opt/local/var/macports/build/_opt_mports_trunk_dports_aqua_qt4-mac/work/qt-everywhere-opensource-src-4.6.0" && /usr/bin/make -j2 first " returned error 2
:error:build Target org.macports.build returned: shell command failed
:debug:build Backtrace: shell command failed
    while executing
"command_exec build"
    (procedure "portbuild::build_main" line 9)
    invoked from within
"$procedure $targetname"

[sharky@…]

This should be fixed in r62510