Arch Linux

Description:
clang++ uses old, hardcoded search paths for C++ includes.

A simple C++ Hello World using <iostream> cannot be compiled.

$ clang++ -o hello hello.cpp
hello.cpp:1:10: fatal error: 'iostream' file not found
#include <iostream>
^
1 diagnostic generated.

clang-svn from AUR uses the following patch:
http://aur.archlinux.org/packages/clang-svn/clang-svn/cppheaders.patch

Additional info:
* clang and llvm 2.7
* strace -f clang++ -o hello hello.cpp
at http://pastebin.com/21Uzi46p

Steps to reproduce:
* install gcc 4.5.0 and clang/llvm 2.7
* try to compile a C++ file using C++ headers with clang++ without specifying -I/usr/include/c++...