On Oct 31, 2014, at 8:54 AM, Marshall Clow <mclow.lists@gmail.com> wrote:

[ Please disregard previous message; apparently I am brain-dead this morning. The uploaded files are correct, though. ] 

Release candidate files for 1.57.0 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.

The files (and associated md5s) are:
MD5 (./boost_1_57_0_rc1.7z) = 17c98dd78d6180f553fbefe5a0f57d12
MD5 (./boost_1_57_0_rc1.tar.bz2) = 1be49befbdd9a5ce9def2983ba3e7b76
MD5 (./boost_1_57_0_rc1.tar.gz) = 25f9a8ac28beeb5ab84aa98510305299
MD5 (./boost_1_57_0_rc1.zip) = 5e040e578e3f0ba879da04a1e0cd55ff 

I have successfully built the RCs on Mac OS X six ways:

clang -std=c++03
clang -std=c++11
clang -std=c++14
gcc -std=c++03
gcc -std=c++11
gcc -std=c++14

where
clang —> Apple LLVM version 6.0 (clang-600.0.54)
gcc —>  g++ (GCC) 4.9.0

— Marshall