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