Building C++ not working in OSX 10.9

Update:

I solved the problem in the end by reinstalling command line tools, as shown in this link. Sorry for the trouble!

Initial question

I have just upgraded to OSX Mavericks and I cannot make the compiler work anymore. I've been using gcc48 from macports with vim/sb2 and everything was working just fine. Now any library that I include gives tons of errors. I am not very experienced and I do not know what to do, or what to search for. I just want it to work like before. Here is what is says when compiling a basic "hello world" program:

In file included from /opt/local/include/gcc48/c++/bits/postypes.h:40:0,
             from /opt/local/include/gcc48/c++/iosfwd:40,
             from /opt/local/include/gcc48/c++/ios:38,
             from /opt/local/include/gcc48/c++/ostream:38,
             from /opt/local/include/gcc48/c++/iostream:39,
             from ceva.cpp:1:
/opt/local/include/gcc48/c++/cwchar:44:19: fatal error: wchar.h: No such file or directory
#include <wchar.h>

If you need any information, tell me and I will provide it to you. Thank you for your patience!