Please compress large files; I've uploaded a compressed version of your log and deleted the original.
Remember also to use WikiFormatting when writing in Trac, to fill in the Port field, and to Cc the maintainer of that port.
The first error I see in the log is:
:info:build libtool: link: /usr/bin/llvm-g++-4.2 -pipe -O2 -arch x86_64 -O2 -arch x86_64 -o Programs/TestWebKitAPI/TestWTF Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-AtomicString.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-CString.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-CheckedArithmeticOperations.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-Functional.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-HashMap.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-MediaTime.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-RedBlackTree.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-StringBuilder.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-StringImpl.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-StringOperators.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-TemporaryChange.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-VectorBasic.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-Vector.o Tools/TestWebKitAPI/Tests/WTF/Programs_TestWebKitAPI_TestWTF-VectorReverse.o -L/opt/local/lib Libraries/.libs/libTestWebKitAPIMain.a Libraries/.libs/libgtest.a ./.libs/libWTF.a -licui18n -licuuc -licudata /opt/local/lib/libgtk-x11-2.0.dylib /opt/local/lib/libgdk-x11-2.0.dylib /opt/local/lib/libatk-1.0.dylib /opt/local/lib/libpangocairo-1.0.dylib /opt/local/lib/libXinerama.dylib /opt/local/lib/libXi.dylib /opt/local/lib/libXrandr.dylib /opt/local/lib/libXext.dylib /opt/local/lib/libXcursor.dylib /opt/local/lib/libXcomposite.dylib /opt/local/lib/libXdamage.dylib /opt/local/lib/libgdk_pixbuf-2.0.dylib /opt/local/lib/libpangoft2-1.0.dylib /opt/local/lib/libXfixes.dylib /opt/local/lib/libcairo.dylib /opt/local/lib/libpixman-1.dylib /opt/local/lib/libpng15.dylib /opt/local/lib/libxcb-shm.dylib /opt/local/lib/libX11-xcb.dylib /opt/local/lib/libxcb-render.dylib /opt/local/lib/libXrender.dylib /opt/local/lib/libX11.dylib /opt/local/lib/libxcb.dylib /opt/local/lib/libXau.dylib /opt/local/lib/libXdmcp.dylib /opt/local/lib/libpango-1.0.dylib /opt/local/lib/libfontconfig.dylib /opt/local/lib/libfreetype.dylib -lbz2 /opt/local/lib/libexpat.dylib /opt/local/lib/libsoup-2.4.dylib /opt/local/lib/libxml2.dylib -lpthread /opt/local/lib/liblzma.dylib -lm /opt/local/lib/libgio-2.0.dylib /opt/local/lib/libgmodule-2.0.dylib -lz /opt/local/lib/libgobject-2.0.dylib /opt/local/lib/libgthread-2.0.dylib /opt/local/lib/libffi.dylib /opt/local/lib/libglib-2.0.dylib -lresolv /opt/local/lib/libintl.dylib /opt/local/lib/libiconv.dylib -lc -pthread
:info:build Undefined symbols for architecture x86_64:
:info:build "_objc_registerThreadWithCollector", referenced from:
:info:build WTF::initializeCurrentThreadInternal(char const*)in libWTF.a(libWTF_la-ThreadingPthreads.o)
:info:build ld: symbol(s) not found for architecture x86_64
:info:build collect2: ld returned 1 exit status
I see this same error was also filed as upstream bug 58737 last year against Snow Leopard. There is a small patch attached there.