Error: Target org.macports.build returned: shell command failed (see log for details)

[andreas@…]

--->  Fetching archive for gtk2
--->  Fetching gtk2
--->  Verifying checksum(s) for gtk2
--->  Extracting gtk2
--->  Applying patches to gtk2
--->  Configuring gtk2
--->  Building gtk2
Error: Target org.macports.build returned: shell command failed (see log for details)
Error: Failed to install gtk2
Log for gtk2 is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_gnome_gtk2/gtk2/main.log
Error: The following dependencies were not installed: librsvg gtk2 libart_lgpl libcroco libgsf gconf orbit2 libidl policykit eggdbus gnome-vfs desktop-file-utils gnome-mime-data libbonobo libtorrent-rasterbar libgeoip py26-chardet py26-distribute py26-distribute py26-game libsdl libsdl_image libsdl_mixer flac libogg libmikmod libvorbis smpeg libsdl_ttf py26-numpy atlas gcc44 gcc_select gmp mpfr xz gzip texinfo fftw-3 py26-nose py26-gtk libglade2 py26-cairo py26-py py26-mako py26-notify-python libnotify py26-openssl py26-twisted py26-zopeinterface py26-twisted-web2 py26-xdg py26-numeric
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

[mf2k (Frank Schima)]

Error looks to be:

:info:build libtool: link: /Developer/usr/bin/llvm-g++-4.2 -O2 -arch x86_64 -arch x86_64 -o autotestkeywords autotestkeywords-autotestkeywords.o  -L/opt/local/lib /opt/local/lib/libintl.dylib /opt/local/lib/libiconv.dylib -lc
:info:build Undefined symbols for architecture x86_64:
:info:build   "_objc_msgSend_fixup", referenced from:
:info:build       l_objc_msgSend_fixup_autorelease in autotestkeywords-autotestkeywords.o
:info:build      (maybe you meant: l_objc_msgSend_fixup_autorelease)
:info:build ld: symbol(s) not found for architecture x86_64

So you are on Lion? Did you upgrade from Snow Leopard and follow the Migration Procedure?