[Boost-bugs] [Boost C++ Libraries] #12969: Problem linking print_helper_t<nullptr_t> under Clang

Subject: [Boost-bugs] [Boost C++ Libraries] #12969: Problem linking print_helper_t<nullptr_t> under Clang
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-04-13 17:53:19

#12969: Problem linking print_helper_t<nullptr_t> under Clang
-------------------------------------------------+-------------------------
 Reporter:  Tony Lewis <TonyELewis@…>            |      Owner:  rogeeff
     Type:  Bugs                                 |     Status:  new
Milestone:  To Be Determined                     |  Component:  test
  Version:  Boost 1.64.0                         |   Severity:  Problem
 Keywords:                                       |
  test,link,print_helper_t,nullptr,nullptr_t,1_64_0_b2|
-------------------------------------------------+-------------------------
 I'm trying out 1.64.0 b2...

 I can get the following code to compile, link and run under GCC :

 {{{
 #!cpp
 #define BOOST_TEST_DYN_LINK

 #include <boost/test/unit_test.hpp>

 BOOST_AUTO_TEST_CASE( plv_tc ) {
         BOOST_TEST( nullptr == nullptr );
 }

 bool init_function() { return true; }
 int main( int argc, char* argv[] ) {
         return ::boost::unit_test::unit_test_main( &init_function, argc,
 argv );
 }
 }}}

 ...with commands:

 {{{
 setenv BOOST_ROOT /opt/boost_1_64_0_b2_gcc_build
 setenv LD_LIBRARY_PATH $BOOST_ROOT/lib
 g++ -std=c++11 -isystem $BOOST_ROOT/include boost-test.nullptr-problem.cpp
 -L$BOOST_ROOT/lib -lboost_unit_test_framework-mt
 ./a.out
 }}}

 ...but if I try with Clang:

 {{{
 setenv BOOST_ROOT /opt/boost_1_64_0_b2_clang_build
 setenv LD_LIBRARY_PATH $BOOST_ROOT/lib
 clang++ -std=c++11 -stdlib=libc++ -isystem $BOOST_ROOT/include boost-test
 .nullptr-problem.cpp -L$BOOST_ROOT/lib -lboost_unit_test_framework-mt
 }}}

 ...I get:

 {{{
 /tmp/boost-test-fe7931.o: In function `std::__1::basic_ostream<char,
 std::__1::char_traits<char> >& boost::test_tools::tt_detail::operator<<
 <decltype(nullptr)>(std::__1::basic_ostream<char,
 std::__1::char_traits<char> >&,
 boost::test_tools::tt_detail::print_helper_t<decltype(nullptr)> const&)':
 boost-test.nullptr-
 problem.cpp:(.text._ZN5boost10test_tools9tt_detaillsIDnEERNSt3__113basic_ostreamIcNS3_11char_traitsIcEEEES8_RKNS1_14print_helper_tIT_EE[_ZN5boost10test_tools9tt_detaillsIDnEERNSt3__113basic_ostreamIcNS3_11char_traitsIcEEEES8_RKNS1_14print_helper_tIT_EE]+0x26):
 undefined reference to
 `boost::test_tools::tt_detail::print_log_value<decltype(nullptr)>::operator()(std::__1::basic_ostream<char,
 std::__1::char_traits<char> >&, decltype(nullptr))'
 clang: error: linker command failed with exit code 1 (use -v to see
 invocation)
 }}}

 I may well just be doing something stupid - apologies if so.

 I'm using Clang++ 3.8.1 and GCC 6.2.0 on Ubuntu 16.10 (Linux
 4.8.0-46-generic; x86_64).

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12969>
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