qemu, and using gcc45+ compilers on systems set up with LibCxxOnOlderSystems and libc++

[Ryan Schmidt]

> On Sep 11, 2016, at 10:25 PM, Ken Cunningham <ken.cunningham.webuse at gmail.com> wrote:
> 
> I would like to try building qemu, but it doesn't seem to be able to build with clang-3.7 or clang-3.8 (on 10.68 with LibCxxOnOlderSystems and libc++)
> 
> the error for both 
> :info:configure ERROR: Your compiler does not support the __thread specifier for 
> :info:configure        Thread-Local Storage (TLS). Please upgrade to a version that does.

I remember this error but according to

http://clang.llvm.org/cxx_status.html

clang 3.3 and later do support thread-local storage, provided you have libc++abi 3.6 or later, which we do in MacPorts.