anonymous — Thu, 16 Jun 2011 17:01:04 GMT

Here is the linker error:

/path/to/Test_err.cc:34: undefined reference to `Test_err::Tested_class_traits<SomeClass>::result'

status changed; resolution set

Steven Watanabe — Sun, 16 Oct 2011 23:11:53 GMT

status new → closed
resolution → wontfix

This is not unique to Boost.Test. An out of line definition of a static constant is required in some circumstances. You can often get away without it, but it's safest just to provide it all the time.

anonymous — Sun, 27 Jan 2013 23:15:16 GMT

Replying to steven_watanabe:

This is not unique to Boost.Test. An out of line definition of a static constant is required in some circumstances. You can often get away without it, but it's safest just to provide it all the time.

Hi, I've just tried two very similar test cases:

#define BOOST_TEST_MODULE geez
#include <boost/test/unit_test.hpp>
#include <boost/tuple/tuple.hpp>
BOOST_AUTO_TEST_SUITE(foo)
BOOST_AUTO_TEST_CASE(bar)
{
  using boost::tuples::length;
  using boost::tuples::tuple;
  BOOST_CHECK_EQUAL( (length<tuple<int, char> >::value), 2);
}
BOOST_AUTO_TEST_SUITE_END()

this program won't link:

ptomulik@barakus:$ g++ -DBOOST_TEST_DYN_LINK=1 -ansi -Werror -Wall -Wextra -pedantic b.cpp -lboost_unit_test_framework
/tmp/cc1snUGj.o: In function `foo::bar::test_method()':
b.cpp:(.text+0x188): undefined reference to `boost::tuples::length<boost::tuples::tuple<int, char, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >::value'
collect2: error: ld returned 1 exit status

Quite suprising, but when I replace BOOST_CHECK_EQUAL(a,b) with BOOST_CHECK(a == b), the program compiles and links smoothly:

#define BOOST_TEST_MODULE geez
#include <boost/test/unit_test.hpp>
#include <boost/tuple/tuple.hpp>
BOOST_AUTO_TEST_SUITE(foo)
BOOST_AUTO_TEST_CASE(bar)
{
  using boost::tuples::length;
  using boost::tuples::tuple;
  BOOST_CHECK( (length<tuple<int, char> >::value) == 2);
}
BOOST_AUTO_TEST_SUITE_END()

ptomulik@barakus:$ g++ -DBOOST_TEST_DYN_LINK=1 -ansi -Werror -Wall -Wextra -pedantic b.cpp -lboost_unit_test_framework
ptomulik@barakus:$

This is quite strange, and looks like bug in boost test framework, boost tuple implementation or elsewhere.

Note, that very similar code with BOOST_CHECK_EQUAL but for std::tuple compiles and links just fine:

#define BOOST_TEST_MODULE geez
#include <boost/test/unit_test.hpp>
#include <tuple>
BOOST_AUTO_TEST_SUITE(foo)
BOOST_AUTO_TEST_CASE(bar)
{
  using std::tuple_size;
  using std::tuple;
  BOOST_CHECK_EQUAL( (tuple_size<tuple<int, char> >::value), 2);
}
BOOST_AUTO_TEST_SUITE_END()

ptomulik@barakus:$ g++ -DBOOST_TEST_DYN_LINK=1 -ansi -std=c++11 -Werror -Wall -Wextra -pedantic b.cpp -lboost_unit_test_framework
ptomulik@barakus:$

Boost C++ Libraries: Ticket #5615: BOOST_CHECK_EQUAL does not work well with const static members

status changed; resolution set