Actually, this seems more widespread that just filesystem:
My project is set to link to run-time DLLs in C++Builder project options. boost-thread correctly looks for boost_thread-bcb-mt-d-1_32.lib, but date_time, filesystem and regex all look for
libboost_XXXXXX-bcb-mt-d-1_32.lib, not boost_XXXXXX-bcb-mt-d-1_32.lib
Shouldn't they pick up the compiler switch that says I'm using runtime-dlls or do I need to explicitly say use boost dlls?
Yes, if you're linking to the dll runtime then you can either link to the static or the dll versions of the libraries. The default is static linking in this release, defining BOOST_ALL_DYN_LINK changes it to dynamic linking. Boost.Threads uses dynamic linking by default because there is no static version, or is there, actually I thought this had been fixed? We also need to add something about this in the getting started docs. John.