Linking c++ libraries (for Wt) in Xcode - c++

Question

I'm sorry to ask a question that resurfaces all over the place in different forms, but this has me tearing my hair out and I've tried every suggestion from all the dark corners of the internet.
I'm trying to use the Wt framework (for web based c++ applications) with Xcode. Its header files are at /usr/local/include and its library files (and boost's) are at /usr/local/lib. I can compile at the terminal with
gcc -o hello testWt.cpp -lstdc++ -lwt.3.3.0 -lwthttp.3.3.0 -lboost_random -lboost_regex -lboost_signals -lboost_system -lboost_thread -lboost_filesystem -lboost_program_options -lboost_date_time
but within Xcode I've had no luck. I've tried:
Adding -I/usr/local/include to the OTHER_C++_FLAGS option
Adding /usr/local/lib to the Library Search Paths option
Adding /usr/local/include to Header Search Paths
Dragging all the libraries (both the .dylib and/or the .a versions) into the "Link Binary with Libraries" section
All combinations of the above
Now, I'm bashing my head against this linker error:
Ld /Users/charles/Library/Developer/Xcode/DerivedData/Test-dzrqjofmpnjowvcwtscacpwnhtqw/Build/Products/Debug/Test normal x86_64
cd /Users/charles/tmp/Test
setenv MACOSX_DEPLOYMENT_TARGET 10.7
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -L/Users/charles/Library/Developer/Xcode/DerivedData/Test-dzrqjofmpnjowvcwtscacpwnhtqw/Build/Products/Debug -L/usr/local/lib -F/Users/charles/Library/Developer/Xcode/DerivedData/Test-dzrqjofmpnjowvcwtscacpwnhtqw/Build/Products/Debug -filelist /Users/charles/Library/Developer/Xcode/DerivedData/Test-dzrqjofmpnjowvcwtscacpwnhtqw/Build/Intermediates/Test.build/Debug/Test.build/Objects-normal/x86_64/Test.LinkFileList -mmacosx-version-min=10.7 -stdlib=libc++ -lwt.3.3.0 -lwthttp.3.3.0 -lboost_atomic -lboost_chrono -lboost_context -lboost_date_time -lboost_exception -lboost_filesystem -lboost_graph -lboost_iostreams -lboost_locale -lboost_math_c99 -lboost_math_c99f -lboost_math_c99l -lboost_math_tr1 -lboost_math_tr1f -lboost_math_tr1l -lboost_prg_exec_monitor -lboost_program_options -lboost_python -lboost_random -lboost_regex -lboost_serialization -lboost_signals -lboost_system -lboost_test_exec_monitor -lboost_thread -lboost_timer -lboost_unit_test_framework -lboost_wave -lboost_wserialization -o /Users/charles/Library/Developer/Xcode/DerivedData/Test-dzrqjofmpnjowvcwtscacpwnhtqw/Build/Products/Debug/Test
Undefined symbols for architecture x86_64:
"Wt::WApplication::makeAbsoluteUrl(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) const", referenced from:
vtable for HelloApplication in main.o
ld: symbol(s) not found for architecture x86_64
Further than this I cannot get. This is the first time I've used Xcode for development so I may be missing something obvious; I'd be incredibly grateful if someone could point it out!

Answer 1

OK I finally got it. It turns out that the problem was that my program is written using the libc++ libraries whereas the Wt library was built using the older libstdc++.
To fix this, I recompiled boost and Wt using libc++ instead by changing their CMakeLists.txt file, adding the line set(CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++"). This produced a tonne of warnings, but seemed to work.
After installing these new builds, I made sure that Xcode had -L/usr/local/lib -I/usr/local/include in its Other C++ Flags options and /usr/local/include & /usr/local/lib in 'Header Search Paths' and 'Library Search Paths' respectively. Then, I added the libraries into the "Link Binaries with Library" section. This solved my problem.