remove libstdc++ dependency from libc++ on freebsd 9.x

[Dimitry Andric]

On 23 May 2016, at 11:02, kang joni <kangjoni76 at gmail.com> wrote:
> 
> I need to backport c++11project to BSD 9.x. How to remove libstdc++
> dependency from libc++ and libc++abi as freebsd 10.x did?
> I'm stuck on this. The llvm docs is unclear.

On FreeBSD 9.x, C++11 is not supported out of the box.  As I mentioned
in another thread, currently the only easy way is to build and install
world with the following in /etc/src.conf:

WITH_CLANG_IS_CC=y
WITH_LIBCPLUSPLUS=y

This will make clang the default compiler, and install libc++ headers
and libraries on the system.

Afterwards, you can use -stdlib=libc++ -std=c++11 in the CXXFLAGS for
your project.

-Dimitry

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