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Automatically attach debugger in case of system failure.

Specifies whether Boost.Test should try to attach a debugger in case if fatal system error occurs. If value is yes the default debugger configured for the platform is going to be attempted. Alternatively the debugger identified by the argument value of the parameter is used. For more details on advanced debugger support in Boost.Test check the section dedicated to Boost.Test debug API, in particular the function boost::debug::set_debugger.

Acceptable values
Environment variable
[Warning] Warning

There is a link to the Boost.Test debug API, never heard about