Re: [Boost-users] [Boost.Test 1.34] Multiple instances ofunit_test_log_t singleton

"Kolya" wrote in message news:1f5259800705230242hb812523mc864b34c6d35e145@mail.gmail.com... Hi, All!

I am using Boost.Test library in my own application and I have included boost/test/unit_test.hpp in many my cpp-files. When I used boost version 1.33.1 all works fine. But in version 1.34 I have following compiler error:

file1.obj : error LNK2005: "class unit_test_log_t::boost::unit_test_log_t & boost::unit_test::`anonymous namespace'::unit_test_log" (?unit_test_log@? A0xa35d3712@unit_test@boost@@3AAVunit_test_log_t@23 @A) already defined in file2.obj

Looks liek clear compiler bug. Anounimus namespace is used specifically to avoid duplicate symbols.

After including boost/test/unit_test.hpp class unit_test_log has multiple instances. See boost/test/unit_test_log.hpp for details:

BOOST_TEST_SINGLETON_INST( unit_test_log )

It means that following code will be included in many cpp-files!

namespace { unit_test_log_t & inst = unit_test_log_t::instance(); }

Try adding static. Though it's like saying the same twice. namespace { static unit_test_log_t & inst = unit_test_log_t::instance(); } HTH, Gennadiy