Release candidates for 1.61.0 beta 1 are now available: http://boost.cowic.de/rc/boost_1_61_0_b1_rc1.zip http://boost.cowic.de/rc/boost_1_61_0_b1_rc1.tar.bz2 http://boost.cowic.de/rc/boost_1_61_0_b1_rc1.tar.gz http://boost.cowic.de/rc/boost_1_61_0_b1_rc1.7z 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. These packages were generated by the CI system that Rene has put together, and one user-visible change is that the directory inside archive is named after git commit hash. This will be changed for the final release. Otherwise, these were smoke-tested on Windows and Linux, and should be functionally identical to usual packages. The SHA1 checksums are as follows: b8314cff39908e6d6221bdad01ce1f1468546419 boost_1_61_0_b1_rc1.zip cd916da1aa5ed812e538975171069506ecc4560c boost_1_61_0_b1_rc1.tar.bz2 ca18da298d739ef70145b29e3bd2c8d903067075 boost_1_61_0_b1_rc1.tar.gz 2fb4b8cf9112f59aa1c4b61f2ea0c66cbbe3ffd0 boost_1_61_0_b1_rc1.7z The SHA256 checksums are as follows: 3668b868d3f883327e2ff1324e09899cbb033087147d4dd268424a7729791f94 boost_1_61_0_b1_rc1.zip e07784e9770193ff1e68cfe05c6fd08ca05913afedaedf1aca33f6da30d49b17 boost_1_61_0_b1_rc1.tar.bz2 2344369b6859ed151589286d05b38764a902884c10a4dac9c67b133c6c046130 boost_1_61_0_b1_rc1.tar.gz 9ab80608c9ec70ec7afee25f2213f803ed3d15a71ade2c6ae184c48f33fd9d29 boost_1_61_0_b1_rc1.7z Thanks! -- The release managers