On Oct 17, 2014, at 3:40 PM, Marshall Clow <mclow.lists@gmail.com> wrote:

Release candidate files for 1.57.0 beta 1 are available at
http://boost.cowic.de/rc/

As always, the release managers would appreciate it if you download
the candidate of your choice and give building it a try. Please report
both success and failure, and anything else that is noteworthy.

This helps ensure the candidates build OK before we push them out to SourceForge.

I have successfully build the RC on Mac OS X with the following configurations:
clang -std=c++03
clang -std=c++11
clang -std=c++14
gcc 4.9.0 -std=c++03
gcc 4.9.0 -std=c++11

— Marshall