clang vs boost - take 2

Hi,

Just FYI.

Currently, there are only 17 of 119 boost header files that do not compile with clang++ on my linux box.
On my first attempt, four (4) days ago there were 23 boost header files which did not compile in my test.

At first glance there are currently about 5 distinct issues causing compilation to fail.
Once I get bug reports submitted on these I’ll try to run the boost regression tests
using clang.

Kind Regards,
Maurice