I want to build the Boost libs without ICU support in Regex, but have been unable to prevent it from being linked in. I've run the following commands on a freshly extracted distribution of 1.57: ./bootstrap.sh --without-icu --prefix=/home/rob/workspace/deps/boost/1.57.0/linux/x64/ ./b2 install The bootstrap stage output includes this, which seems to indicate it's behaving correctly: Unicode/ICU support for Boost.Regex?... disabled. The resulting project-config.jam makes no mention of ICU. The build log includes: - has_icu builds : yes - icu : yes The shared library dependencies for the resulting libboost_regex.so.1.57.0 then include: libicuuc.so.50 => /lib64/libicuuc.so.50 (0x00007f74e5e3b000) libicui18n.so.50 => /lib64/libicui18n.so.50 (0x00007f74e5a3b000) libicudata.so.50 => /lib64/libicudata.so.50 (0x00007f74e4467000) I know the docs for Boost.Regex specify the bootstrap argument as --disable-icu, however this is rejected as invalid, unlike the argument I provide. Have I messed up somewhere or is this a bug? TIA -- rob -- Rob Desbois http://theotherbranch.wordpress.com/