[MacPorts] #38984: boost.regex: does not work with clang

[MacPorts]

#38984: boost.regex: does not work with clang
-----------------------------+--------------------------------
 Reporter:  akim.demaille@…  |      Owner:  macports-tickets@…
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.1.3
 Keywords:  clang            |       Port:  boost
-----------------------------+--------------------------------
 The following simple piece of code works as expected with GCC, however it
 fails with clang, whatever the version I tried (MP's 3.1, 3.2 and 3.3).

 {{{
 #include <sstream>
 #include <iostream>

 #include <boost/regex.hpp>

 int main (int argc, const char* argv[])
 {
   boost::regex exp("*");
   boost::regex_match("foo", exp);
 }
 }}}

 clang++ 3.3
 {{{
 $ clang++-mp-3.3 -std=c++11 -stdlib=libc++ -I/opt/local/include
 -L/opt/local/lib -lboost_regex-mt foo.cc
 Undefined symbols for architecture x86_64:
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::construct_init(boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags)", referenced from:
       boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::perl_matcher(char const*, char const*, boost::match_results<char
 const*, std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags, char const*) in foo-abEP0S.o
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match()",
 referenced from:
       bool boost::regex_match<char const*,
 std::__1::allocator<boost::sub_match<char const*> >, char,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >(char const*,
 char const*, boost::match_results<char const*,
 std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags) in foo-abEP0S.o
 ld: symbol(s) not found for architecture x86_64
 clang: error: linker command failed with exit code 1 (use -v to see
 invocation)
 }}}

 GCC
 {{{
 $ g++-mp-4.8 -std=c++11 -I/opt/local/include -L/opt/local/lib
 -lboost_regex-mt foo.cc
 $
 }}}

 Clang 3.2 and 3.1
 {{{
 $ clang++-mp-3.2 -std=c++11 -stdlib=libc++ -I/opt/local/include
 -L/opt/local/lib -lboost_regex-mt foo.cc
 Undefined symbols for architecture x86_64:
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::construct_init(boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags)", referenced from:
       boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::perl_matcher(char const*, char const*, boost::match_results<char
 const*, std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags, char const*) in foo-vigR70.o
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match()",
 referenced from:
       bool boost::regex_match<char const*,
 std::__1::allocator<boost::sub_match<char const*> >, char,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >(char const*,
 char const*, boost::match_results<char const*,
 std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags) in foo-vigR70.o
 ld: symbol(s) not found for architecture x86_64
 clang: error: linker command failed with exit code 1 (use -v to see
 invocation)
 $ clang++-mp-3.1 -std=c++11 -stdlib=libc++ -I/opt/local/include
 -L/opt/local/lib -lboost_regex-mt foo.cc
 Undefined symbols for architecture x86_64:
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::construct_init(boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags)", referenced from:
       boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> >
 >::perl_matcher(char const*, char const*, boost::match_results<char
 const*, std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags, char const*) in foo-MudWDP.o
   "boost::re_detail::perl_matcher<char const*,
 std::__1::allocator<boost::sub_match<char const*> >,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match()",
 referenced from:
       bool boost::regex_match<char const*,
 std::__1::allocator<boost::sub_match<char const*> >, char,
 boost::regex_traits<char, boost::cpp_regex_traits<char> > >(char const*,
 char const*, boost::match_results<char const*,
 std::__1::allocator<boost::sub_match<char const*> > >&,
 boost::basic_regex<char, boost::regex_traits<char,
 boost::cpp_regex_traits<char> > > const&,
 boost::regex_constants::_match_flags) in foo-MudWDP.o
 ld: symbol(s) not found for architecture x86_64
 clang: error: linker command failed with exit code 1 (use -v to see
 invocation)
 }}}

 Note that the error at linking is the same that you'd get if you don't
 pass -lboost_regex-mt at all, so probably something is going wrong when
 trying to use this library.

 Cheers!

-- 
Ticket URL: <https://trac.macports.org/ticket/38984>
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