Boost C++ Libraries

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`log_sink`

Sets the logging sink to the one specified.

This parameter allows to easily redirect the test logs. The parameter value is

either the string containing either a file name, in which case the Unit Test Framework will redirect log into this file
or stdout (the default), in which case log is redirected into standard output stream
or stderr , in which case log is redirected into standard error stream.

Acceptable values

stdout (default)
stderr
arbitrary file name

Environment variable

BOOST_TEST_LOG_SINK