Re: [boost] Running b2 on develop needs asynch-exceptions=on

It probably builds, but then Peter has said that building all of Boost with asynch-exceptions is a bad idea.

I still haven't got an authorative answer whether it should be Boost.Test that builds with /EHa (so that it can catch SEH exception), or whether client code with tests be built with /EHa (so that it converts SEH exceptions into C++ exceptions) or something else.

I suspect both. Certainly if I build Boost.Test without /EHa I see: execution_monitor.cpp 1>m:\data\boost\boost\boost\test\impl\execution_monitor.ipp(948): warning C4535: calling _set_se_translator() requires /EHa Then if you want it to translate structured exceptions in your test code you'll need /EHa there as well presumably. Non-authoritatively yours, John.