./waf build is not able to find include files in MacOS

[mohit2872]

When I run a normal file with g++ or gcc it runs. This means that gcc is able to access the include files. But ./waf build gives following error:
warning: include path for stdlibc++ headers not found; pass '-std=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found]
Can someone resolve this issue ASAP?