From first glance this looks like a boost issue.

We test using clang and brew.

Sent from my Ti85

> On Feb 17, 2014, at 9:25, Dave <email address hidden> wrote:
>
> Public bug reported:
>
> OSX Mavericks
> Gearman 1.1.12 and 1.1.9 being compiled against macports.
>
> Configure:
> export LDFLAGS='-L/opt/local/lib'
> export CPPFLAGS='-I/opt/local/include'
> ./configure -disable-shared -prefix=/opt/local
>
> Make output
> SOME REMOVED
> ...
> In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
> In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
> In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
> In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
> /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
> #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>       ^
> In file included from libgearman-server/thread.cc:45:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:167:
> In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
> In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
> In file included from /opt/local/include/boost/detail/endian.hpp:9:
> In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
> In file included from /opt/local/include/boost/predef/other/endian.h:14:
> /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
> #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>     ^
> 8 warnings generated.
>  CXX      libgearman-server/libgearman_server_libgearman_server_la-timer.lo
> In file included from libgearman-server/timer.cc:40:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
> #if _MSC_VER >= 1020
>    ^
> In file included from libgearman-server/timer.cc:40:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
> In file included from /opt/local/include/boost/function/function1.hpp:11:
> In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
> In file included from /opt/local/include/boost/function/function_template.hpp:13:
> In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
> /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> In file included from libgearman-server/timer.cc:40:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:159:
> In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
> In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
> In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
> In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
> In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
> In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
> In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
> In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
> /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
> #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>       ^
> In file included from libgearman-server/timer.cc:40:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:167:
> In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
> In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
> In file included from /opt/local/include/boost/detail/endian.hpp:9:
> In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
> In file included from /opt/local/include/boost/predef/other/endian.h:14:
> /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
> #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>     ^
> 8 warnings generated.
>  CXX      libgearman-server/libgearman_server_libgearman_server_la-wakeup.lo
>  CXX      libgearman-server/libgearman_server_libgearman_server_la-worker.lo
> In file included from libgearman-server/worker.cc:45:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
> #if _MSC_VER >= 1020
>    ^
> In file included from libgearman-server/worker.cc:45:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
> In file included from /opt/local/include/boost/function/function1.hpp:11:
> In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
> In file included from /opt/local/include/boost/function/function_template.hpp:13:
> In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
> /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> In file included from libgearman-server/worker.cc:45:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:159:
> In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
> In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
> In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
> In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
> In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
> In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
> In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
> In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
> /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
> #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>       ^
> In file included from libgearman-server/worker.cc:45:
> In file included from ./libgearman-server/common.h:46:
> In file included from ./libgearman-server/gearmand.h:63:
> In file included from ./libgearman-server/connection.h:49:
> In file included from ./libgearman-server/struct/io.h:40:
> In file included from ./libgearman-server/plugins/base.h:40:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:167:
> In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
> In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
> In file included from /opt/local/include/boost/detail/endian.hpp:9:
> In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
> In file included from /opt/local/include/boost/predef/other/endian.h:14:
> /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
> #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>     ^
> 8 warnings generated.
>  CXX      libgearman/libgearman_server_libgearman_server_la-command.lo
>  CXX      libgearman/libgearman_server_libgearman_server_la-strerror.lo
>  CXXLD    libgearman-server/libgearman-server.la
> copying selected object files to avoid basename conflicts...
> /opt/local/bin/ranlib: file: libgearman-server/.libs/libgearman-server.a(lt4-libgearman_server_libgearman_server_la-queue.o) has no symbols
> ranlib: file: libgearman-server/.libs/libgearman-server.a(lt4-libgearman_server_libgearman_server_la-queue.o) has no symbols
>  CXX      libgearman/libgearman_libgearman_vector_la-vector.lo
>  CXX      libgearman/libgearman_libgearman_vector_la-backtrace.lo
>  CXXLD    libgearman/libgearman-vector.la
>  CXX      libgearman/libgearman_libgearman_result_la-vector.lo
>  CXX      libgearman/libgearman_libgearman_result_la-result.lo
>  CXX      libgearman/libgearman_libgearman_result_la-backtrace.lo
>  CXXLD    libgearman/libgearman-result.la
>  CXX      libgearman/libgearman_libgearman_hostile_la-check.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-actions.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-aggregator.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-allocator.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-argument.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-add.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-backtrace.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-byteorder.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-client.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-command.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-connection.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-do.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-error.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-error_code.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-execute.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-function.lo
>  CXX      libgearman/function/libgearman_libgearman_hostile_la-function_v2.lo
>  CXX      libgearman/function/libgearman_libgearman_hostile_la-make.lo
>  CXX      libgearman/function/libgearman_libgearman_hostile_la-partition.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-gearman.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-job.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-kill.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-log.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-packet.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-parse.lo
>  CXX      libgearman/protocol/libgearman_libgearman_hostile_la-echo.lo
>  CXX      libgearman/protocol/libgearman_libgearman_hostile_la-option.lo
>  CXX      libgearman/protocol/libgearman_libgearman_hostile_la-submit.lo
>  CXX      libgearman/protocol/libgearman_libgearman_hostile_la-work_exception.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-result.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-run.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-status.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-strerror.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-string.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-task.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-task_attr.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-unique.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-server_options.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-universal.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-vector.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-worker.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-pipe.lo
>  CXX      libgearman/libgearman_libgearman_hostile_la-uuid.lo
>  CXXLD    libgearman/libgearman-hostile.la
> /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libgearman_libgearman_hostile_la-string.o) has no symbols
> /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-behavior.o) has no symbols
> /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-ketama.o) has no symbols
> ranlib: file: libgearman/.libs/libgearman-hostile.a(libgearman_libgearman_hostile_la-string.o) has no symbols
> ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-behavior.o) has no symbols
> ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-ketama.o) has no symbols
>  CXX      bin/arguments.o
>  CXX      bin/function.o
>  CXX      bin/gearman.o
>  CXX      bin/error.o
>  CXX      util/pidfile.o
>  CXXLD    bin/gearman
>  CXX      bin/gearadmin.o
> In file included from bin/gearadmin.cc:84:
> /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
> #if _MSC_VER >= 1020
>    ^
> In file included from bin/gearadmin.cc:84:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
> In file included from /opt/local/include/boost/function/function1.hpp:11:
> In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
> In file included from /opt/local/include/boost/function/function_template.hpp:13:
> In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
> /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>      'destroy_functor_tag'... [-Wswitch-enum]
>          switch (op) {
>                  ^
> In file included from bin/gearadmin.cc:84:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:159:
> In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
> In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
> In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
> In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
> In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
> In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
> In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
> In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
> In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
> /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
> #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>        ^
> /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
> #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>       ^
> In file included from bin/gearadmin.cc:84:
> In file included from /opt/local/include/boost/program_options.hpp:15:
> In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
> In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
> In file included from /opt/local/include/boost/lexical_cast.hpp:167:
> In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
> In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
> In file included from /opt/local/include/boost/detail/endian.hpp:9:
> In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
> In file included from /opt/local/include/boost/predef/other/endian.h:14:
> /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
> #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>     ^
> 8 warnings generated.
>  CXX      util/instance.o
>  CXX      util/operation.o
>  CXXLD    bin/gearadmin
>  CXX      libtest/t_unittest-unittest.o
>  CXX      libtest/libtest_libtest_la-alarm.lo
>  CXX      libtest/libtest_libtest_la-binaries.lo
>  CXX      libtest/libtest_libtest_la-cmdline.lo
>  CXX      libtest/libtest_libtest_la-collection.lo
>  CXX      libtest/libtest_libtest_la-comparison.lo
>  CXX      libtest/libtest_libtest_la-core.lo
>  CXX      libtest/libtest_libtest_la-cpu.lo
>  CXX      libtest/libtest_libtest_la-dns.lo
>  CXX      libtest/libtest_libtest_la-dream.lo
>  CXX      libtest/libtest_libtest_la-drizzled.lo
>  CXX      libtest/libtest_libtest_la-exception.lo
>  CXX      libtest/exception/libtest_libtest_la-fatal.lo
>  CXX      libtest/libtest_libtest_la-formatter.lo
>  CXX      libtest/libtest_libtest_la-client.lo
>  CXX      libtest/libtest_libtest_la-framework.lo
>  CXX      libtest/libtest_libtest_la-has.lo
>  CXX      libtest/libtest_libtest_la-http.lo
>  CXX      libtest/libtest_libtest_la-is_local.lo
>  CXX      libtest/libtest_libtest_la-killpid.lo
>  CXX      libtest/libtest_libtest_la-libtool.lo
>  CXX      libtest/libtest_libtest_la-main.lo
>  CXX      libtest/libtest_libtest_la-port.lo
>  CXX      libtest/libtest_libtest_la-result.lo
>  CXX      libtest/libtest_libtest_la-runner.lo
>  CXX      libtest/libtest_libtest_la-server.lo
>  CXX      libtest/libtest_libtest_la-server_container.lo
>  CXX      libtest/libtest_libtest_la-signal.lo
>  CXX      libtest/libtest_libtest_la-socket.lo
>  CXX      libtest/libtest_libtest_la-strerror.lo
>  CXX      libtest/libtest_libtest_la-timer.lo
>  CXX      libtest/libtest_libtest_la-tmpfile.lo
>  CXX      libtest/libtest_libtest_la-vchar.lo
>  CXX      libtest/libtest_libtest_la-memcached.lo
>  CXX      libtest/libtest_libtest_la-gearmand.lo
>  CXX      libtest/libtest_libtest_la-blobslap_worker.lo
>  CXX      libtest/abort.o
>  CXXLD    libtest/abort
>  CXX      libtest/wait.o
>  CXX      libtest/dream.o
>  CXXLD    libtest/wait
>  CXXLD    libtest/libtest.la
> /opt/local/bin/ranlib: file: libtest/.libs/libtest.a(libtest_libtest_la-binaries.o) has no symbols
> ranlib: file: libtest/.libs/libtest.a(libtest_libtest_la-binaries.o) has no symbols
>  CXXLD    t/unittest
>  CXX      libtest/skiptest.o
>  CXXLD    t/skip
>  CXX      libtest/cpu.o
>  CXX      libtest/core_count.o
>  CXXLD    libtest/core-count
>  CXX      libtest/backtrace_test.o
>  CXX      libgearman/backtrace.o
>  CXXLD    libtest/backtrace
>  CC       libhostile/t/accept.o
>  CCLD     libhostile/t/accept
>  CC       libhostile/t/libhostile_t_hostile_accept-accept.o
>  CC       libhostile/libhostile_libhostile_la-initialize.lo
>  CC       libhostile/libhostile_libhostile_la-dummy.lo
>  CCLD     libhostile/libhostile.la
>  CCLD     libhostile/t/hostile_accept
>  CC       libhostile/t/pipe.o
>  CCLD     libhostile/t/pipe
>  CC       libhostile/t/libhostile_t_hostile_pipe-pipe.o
>  CCLD     libhostile/t/hostile_pipe
>  CC       libhostile/t/pipe2.o
>  CCLD     libhostile/t/pipe2
>  CC       libhostile/t/libhostile_t_hostile_pipe2-pipe2.o
>  CCLD     libhostile/t/hostile_pipe2
>  CC       libhostile/t/close.o
>  CCLD     libhostile/t/close
>  CC       libhostile/t/libhostile_t_hostile_close-close.o
>  CCLD     libhostile/t/hostile_close
>  CC       docs/libgearman/examples/gearman_client_do_background_example.o
>  CCLD     docs/libgearman/examples/gearman_client_do_background_example
> Undefined symbols for architecture x86_64:
>  "std::nothrow", referenced from:
>      _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>      gearman_task_internal_create(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>      gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>      Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>      gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>      gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>      ...
>  "std::terminate()", referenced from:
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-universal.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-packet.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-task.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-connection.o)
>  "vtable for __cxxabiv1::__class_type_info", referenced from:
>      typeinfo for Check in libgearman.a(libgearman_libgearman_la-check.o)
>  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
>  "vtable for __cxxabiv1::__si_class_type_info", referenced from:
>      typeinfo for OptionCheck in libgearman.a(libgearman_libgearman_la-check.o)
>      typeinfo for CancelCheck in libgearman.a(libgearman_libgearman_la-check.o)
>      typeinfo for EchoCheck in libgearman.a(libgearman_libgearman_la-check.o)
>  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
>  "operator delete(void*)", referenced from:
>      _gearman_client_free in libgearman.a(libgearman_libgearman_la-client.o)
>      gearman_universal_free(gearman_universal_st&) in libgearman.a(libgearman_libgearman_la-universal.o)
>      gearman_free_all_cons(gearman_universal_st&) in libgearman.a(libgearman_libgearman_la-universal.o)
>      CancelCheck::~CancelCheck() in libgearman.a(libgearman_libgearman_la-universal.o)
>      OptionCheck::~OptionCheck() in libgearman.a(libgearman_libgearman_la-universal.o)
>      gearman_packet_create_args(gearman_universal_st&, gearman_packet_st&, gearman_magic_t, gearman_command_t, void const**, unsigned long const*, unsigned long) in libgearman.a(libgearman_libgearman_la-packet.o)
>      gearman_packet_free(gearman_packet_st*) in libgearman.a(libgearman_libgearman_la-packet.o)
>      ...
>  "operator delete(void*, std::nothrow_t const&)", referenced from:
>      _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>      gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>      Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>      gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>      gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>      gearman_connection_copy(gearman_universal_st&, gearman_connection_st const&) in libgearman.a(libgearman_libgearman_la-connection.o)
>      ...
>  "operator new(unsigned long, std::nothrow_t const&)", referenced from:
>      _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>      gearman_task_internal_create(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>      gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>      Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>      gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>      gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>      ...
>  "___cxa_begin_catch", referenced from:
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-universal.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-packet.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-task.o)
>      ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-connection.o)
>  "___gxx_personality_v0", referenced from:
>      _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>      _client_do(gearman_client_st*, gearman_command_t, char const*, char const*, void const*, unsigned long, unsigned long*, gearman_return_t*) in libgearman.a(libgearman_libgearman_la-client.o)
>      _client_do_background(gearman_client_st*, gearman_command_t, gearman_string_t&, gearman_unique_t&, gearman_string_t&, char*) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_unique_status in libgearman.a(libgearman_libgearman_la-client.o)
>      gearman_client_run_block_tasks(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-client.o)
>      _gearman_client_job_status in libgearman.a(libgearman_libgearman_la-client.o)
>      ...
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
> make[1]: *** [docs/libgearman/examples/gearman_client_do_background_example] Error 1
>
>
> Let me know if you need any more info or if I can help in any way.
>
> ** Affects: gearmand
>     Importance: Undecided
>         Status: New
>
> ** Summary changed:
>
> - Make files with 'Undefined symbols for architecture x86_64:   "std::nothrow"'
> + Make fails with 'Undefined symbols for architecture x86_64:   "std::nothrow"'
>
> --
> You received this bug notification because you are subscribed to
> Gearman.
> https://bugs.launchpad.net/bugs/1281194
>
> Title:
>  Make fails with 'Undefined symbols for architecture x86_64:
>  "std::nothrow"'
>
> Status in Gearman Server and Client Libraries:
>  New
>
> Bug description:
>  OSX Mavericks
>  Gearman 1.1.12 and 1.1.9 being compiled against macports.
>
>  Configure:
>  export LDFLAGS='-L/opt/local/lib'
>  export CPPFLAGS='-I/opt/local/include'
>  ./configure -disable-shared -prefix=/opt/local
>
>  Make output
>  SOME REMOVED
>  ...
>  In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
>  In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
>  In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
>  In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
>  /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
>  #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>         ^
>  In file included from libgearman-server/thread.cc:45:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:167:
>  In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
>  In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
>  In file included from /opt/local/include/boost/detail/endian.hpp:9:
>  In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
>  In file included from /opt/local/include/boost/predef/other/endian.h:14:
>  /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
>  #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>       ^
>  8 warnings generated.
>    CXX      libgearman-server/libgearman_server_libgearman_server_la-timer.lo
>  In file included from libgearman-server/timer.cc:40:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
>  #if _MSC_VER >= 1020
>      ^
>  In file included from libgearman-server/timer.cc:40:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
>  In file included from /opt/local/include/boost/function/function1.hpp:11:
>  In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
>  In file included from /opt/local/include/boost/function/function_template.hpp:13:
>  In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
>  /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  In file included from libgearman-server/timer.cc:40:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:159:
>  In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
>  In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
>  In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
>  In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
>  In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
>  In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
>  In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
>  /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
>  #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>         ^
>  In file included from libgearman-server/timer.cc:40:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:167:
>  In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
>  In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
>  In file included from /opt/local/include/boost/detail/endian.hpp:9:
>  In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
>  In file included from /opt/local/include/boost/predef/other/endian.h:14:
>  /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
>  #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>       ^
>  8 warnings generated.
>    CXX      libgearman-server/libgearman_server_libgearman_server_la-wakeup.lo
>    CXX      libgearman-server/libgearman_server_libgearman_server_la-worker.lo
>  In file included from libgearman-server/worker.cc:45:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
>  #if _MSC_VER >= 1020
>      ^
>  In file included from libgearman-server/worker.cc:45:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
>  In file included from /opt/local/include/boost/function/function1.hpp:11:
>  In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
>  In file included from /opt/local/include/boost/function/function_template.hpp:13:
>  In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
>  /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  In file included from libgearman-server/worker.cc:45:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:159:
>  In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
>  In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
>  In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
>  In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
>  In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
>  In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
>  In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
>  /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
>  #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>         ^
>  In file included from libgearman-server/worker.cc:45:
>  In file included from ./libgearman-server/common.h:46:
>  In file included from ./libgearman-server/gearmand.h:63:
>  In file included from ./libgearman-server/connection.h:49:
>  In file included from ./libgearman-server/struct/io.h:40:
>  In file included from ./libgearman-server/plugins/base.h:40:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:167:
>  In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
>  In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
>  In file included from /opt/local/include/boost/detail/endian.hpp:9:
>  In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
>  In file included from /opt/local/include/boost/predef/other/endian.h:14:
>  /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
>  #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>       ^
>  8 warnings generated.
>    CXX      libgearman/libgearman_server_libgearman_server_la-command.lo
>    CXX      libgearman/libgearman_server_libgearman_server_la-strerror.lo
>    CXXLD    libgearman-server/libgearman-server.la
>  copying selected object files to avoid basename conflicts...
>  /opt/local/bin/ranlib: file: libgearman-server/.libs/libgearman-server.a(lt4-libgearman_server_libgearman_server_la-queue.o) has no symbols
>  ranlib: file: libgearman-server/.libs/libgearman-server.a(lt4-libgearman_server_libgearman_server_la-queue.o) has no symbols
>    CXX      libgearman/libgearman_libgearman_vector_la-vector.lo
>    CXX      libgearman/libgearman_libgearman_vector_la-backtrace.lo
>    CXXLD    libgearman/libgearman-vector.la
>    CXX      libgearman/libgearman_libgearman_result_la-vector.lo
>    CXX      libgearman/libgearman_libgearman_result_la-result.lo
>    CXX      libgearman/libgearman_libgearman_result_la-backtrace.lo
>    CXXLD    libgearman/libgearman-result.la
>    CXX      libgearman/libgearman_libgearman_hostile_la-check.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-actions.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-aggregator.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-allocator.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-argument.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-add.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-backtrace.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-byteorder.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-client.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-command.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-connection.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-do.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-error.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-error_code.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-execute.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-function.lo
>    CXX      libgearman/function/libgearman_libgearman_hostile_la-function_v2.lo
>    CXX      libgearman/function/libgearman_libgearman_hostile_la-make.lo
>    CXX      libgearman/function/libgearman_libgearman_hostile_la-partition.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-gearman.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-job.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-kill.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-log.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-packet.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-parse.lo
>    CXX      libgearman/protocol/libgearman_libgearman_hostile_la-echo.lo
>    CXX      libgearman/protocol/libgearman_libgearman_hostile_la-option.lo
>    CXX      libgearman/protocol/libgearman_libgearman_hostile_la-submit.lo
>    CXX      libgearman/protocol/libgearman_libgearman_hostile_la-work_exception.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-result.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-run.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-status.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-strerror.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-string.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-task.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-task_attr.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-unique.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-server_options.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-universal.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-vector.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-worker.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-pipe.lo
>    CXX      libgearman/libgearman_libgearman_hostile_la-uuid.lo
>    CXXLD    libgearman/libgearman-hostile.la
>  /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libgearman_libgearman_hostile_la-string.o) has no symbols
>  /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-behavior.o) has no symbols
>  /opt/local/bin/ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-ketama.o) has no symbols
>  ranlib: file: libgearman/.libs/libgearman-hostile.a(libgearman_libgearman_hostile_la-string.o) has no symbols
>  ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-behavior.o) has no symbols
>  ranlib: file: libgearman/.libs/libgearman-hostile.a(libhashkit_libhashkit_la-ketama.o) has no symbols
>    CXX      bin/arguments.o
>    CXX      bin/function.o
>    CXX      bin/gearman.o
>    CXX      bin/error.o
>    CXX      util/pidfile.o
>    CXXLD    bin/gearman
>    CXX      bin/gearadmin.o
>  In file included from bin/gearadmin.cc:84:
>  /opt/local/include/boost/program_options.hpp:11:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
>  #if _MSC_VER >= 1020
>      ^
>  In file included from bin/gearadmin.cc:84:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:13:
>  In file included from /opt/local/include/boost/function/function1.hpp:11:
>  In file included from /opt/local/include/boost/function/detail/maybe_include.hpp:18:
>  In file included from /opt/local/include/boost/function/function_template.hpp:13:
>  In file included from /opt/local/include/boost/function/detail/prologue.hpp:17:
>  /opt/local/include/boost/function/function_base.hpp:432:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  /opt/local/include/boost/function/function_base.hpp:535:19: warning: 4 enumeration values not explicitly handled in switch: 'clone_functor_tag', 'move_functor_tag',
>        'destroy_functor_tag'... [-Wswitch-enum]
>            switch (op) {
>                    ^
>  In file included from bin/gearadmin.cc:84:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:159:
>  In file included from /opt/local/include/boost/numeric/conversion/cast.hpp:33:
>  In file included from /opt/local/include/boost/numeric/conversion/converter.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/conversion_traits.hpp:13:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/conversion_traits.hpp:17:
>  In file included from /opt/local/include/boost/numeric/conversion/detail/meta.hpp:17:
>  In file included from /opt/local/include/boost/mpl/equal_to.hpp:19:
>  In file included from /opt/local/include/boost/mpl/aux_/comparison_op.hpp:27:
>  In file included from /opt/local/include/boost/mpl/aux_/numeric_op.hpp:22:
>  In file included from /opt/local/include/boost/mpl/apply_wrap.hpp:23:
>  In file included from /opt/local/include/boost/mpl/aux_/has_apply.hpp:17:
>  /opt/local/include/boost/mpl/has_xxx.hpp:344:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:357:9: warning: 'BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:386:9: warning: 'BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION' is not defined, evaluates to 0 [-Wundef]
>  #   if !BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION
>          ^
>  /opt/local/include/boost/mpl/has_xxx.hpp:459:8: warning: 'BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE' is not defined, evaluates to 0 [-Wundef]
>  #   if BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE
>         ^
>  In file included from bin/gearadmin.cc:84:
>  In file included from /opt/local/include/boost/program_options.hpp:15:
>  In file included from /opt/local/include/boost/program_options/options_description.hpp:13:
>  In file included from /opt/local/include/boost/program_options/value_semantic.hpp:14:
>  In file included from /opt/local/include/boost/lexical_cast.hpp:167:
>  In file included from /opt/local/include/boost/math/special_functions/sign.hpp:18:
>  In file included from /opt/local/include/boost/math/special_functions/detail/fp_traits.hpp:27:
>  In file included from /opt/local/include/boost/detail/endian.hpp:9:
>  In file included from /opt/local/include/boost/predef/detail/endian_compat.h:11:
>  In file included from /opt/local/include/boost/predef/other/endian.h:14:
>  /opt/local/include/boost/predef/os/macos.h:34:6: warning: 'BOOST_PREDEF_DETAIL_OS_DETECTED' is not defined, evaluates to 0 [-Wundef]
>  #if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
>       ^
>  8 warnings generated.
>    CXX      util/instance.o
>    CXX      util/operation.o
>    CXXLD    bin/gearadmin
>    CXX      libtest/t_unittest-unittest.o
>    CXX      libtest/libtest_libtest_la-alarm.lo
>    CXX      libtest/libtest_libtest_la-binaries.lo
>    CXX      libtest/libtest_libtest_la-cmdline.lo
>    CXX      libtest/libtest_libtest_la-collection.lo
>    CXX      libtest/libtest_libtest_la-comparison.lo
>    CXX      libtest/libtest_libtest_la-core.lo
>    CXX      libtest/libtest_libtest_la-cpu.lo
>    CXX      libtest/libtest_libtest_la-dns.lo
>    CXX      libtest/libtest_libtest_la-dream.lo
>    CXX      libtest/libtest_libtest_la-drizzled.lo
>    CXX      libtest/libtest_libtest_la-exception.lo
>    CXX      libtest/exception/libtest_libtest_la-fatal.lo
>    CXX      libtest/libtest_libtest_la-formatter.lo
>    CXX      libtest/libtest_libtest_la-client.lo
>    CXX      libtest/libtest_libtest_la-framework.lo
>    CXX      libtest/libtest_libtest_la-has.lo
>    CXX      libtest/libtest_libtest_la-http.lo
>    CXX      libtest/libtest_libtest_la-is_local.lo
>    CXX      libtest/libtest_libtest_la-killpid.lo
>    CXX      libtest/libtest_libtest_la-libtool.lo
>    CXX      libtest/libtest_libtest_la-main.lo
>    CXX      libtest/libtest_libtest_la-port.lo
>    CXX      libtest/libtest_libtest_la-result.lo
>    CXX      libtest/libtest_libtest_la-runner.lo
>    CXX      libtest/libtest_libtest_la-server.lo
>    CXX      libtest/libtest_libtest_la-server_container.lo
>    CXX      libtest/libtest_libtest_la-signal.lo
>    CXX      libtest/libtest_libtest_la-socket.lo
>    CXX      libtest/libtest_libtest_la-strerror.lo
>    CXX      libtest/libtest_libtest_la-timer.lo
>    CXX      libtest/libtest_libtest_la-tmpfile.lo
>    CXX      libtest/libtest_libtest_la-vchar.lo
>    CXX      libtest/libtest_libtest_la-memcached.lo
>    CXX      libtest/libtest_libtest_la-gearmand.lo
>    CXX      libtest/libtest_libtest_la-blobslap_worker.lo
>    CXX      libtest/abort.o
>    CXXLD    libtest/abort
>    CXX      libtest/wait.o
>    CXX      libtest/dream.o
>    CXXLD    libtest/wait
>    CXXLD    libtest/libtest.la
>  /opt/local/bin/ranlib: file: libtest/.libs/libtest.a(libtest_libtest_la-binaries.o) has no symbols
>  ranlib: file: libtest/.libs/libtest.a(libtest_libtest_la-binaries.o) has no symbols
>    CXXLD    t/unittest
>    CXX      libtest/skiptest.o
>    CXXLD    t/skip
>    CXX      libtest/cpu.o
>    CXX      libtest/core_count.o
>    CXXLD    libtest/core-count
>    CXX      libtest/backtrace_test.o
>    CXX      libgearman/backtrace.o
>    CXXLD    libtest/backtrace
>    CC       libhostile/t/accept.o
>    CCLD     libhostile/t/accept
>    CC       libhostile/t/libhostile_t_hostile_accept-accept.o
>    CC       libhostile/libhostile_libhostile_la-initialize.lo
>    CC       libhostile/libhostile_libhostile_la-dummy.lo
>    CCLD     libhostile/libhostile.la
>    CCLD     libhostile/t/hostile_accept
>    CC       libhostile/t/pipe.o
>    CCLD     libhostile/t/pipe
>    CC       libhostile/t/libhostile_t_hostile_pipe-pipe.o
>    CCLD     libhostile/t/hostile_pipe
>    CC       libhostile/t/pipe2.o
>    CCLD     libhostile/t/pipe2
>    CC       libhostile/t/libhostile_t_hostile_pipe2-pipe2.o
>    CCLD     libhostile/t/hostile_pipe2
>    CC       libhostile/t/close.o
>    CCLD     libhostile/t/close
>    CC       libhostile/t/libhostile_t_hostile_close-close.o
>    CCLD     libhostile/t/hostile_close
>    CC       docs/libgearman/examples/gearman_client_do_background_example.o
>    CCLD     docs/libgearman/examples/gearman_client_do_background_example
>  Undefined symbols for architecture x86_64:
>    "std::nothrow", referenced from:
>        _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>        gearman_task_internal_create(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>        gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>        Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>        gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>        gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>        ...
>    "std::terminate()", referenced from:
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-universal.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-packet.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-task.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-connection.o)
>    "vtable for __cxxabiv1::__class_type_info", referenced from:
>        typeinfo for Check in libgearman.a(libgearman_libgearman_la-check.o)
>    NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
>    "vtable for __cxxabiv1::__si_class_type_info", referenced from:
>        typeinfo for OptionCheck in libgearman.a(libgearman_libgearman_la-check.o)
>        typeinfo for CancelCheck in libgearman.a(libgearman_libgearman_la-check.o)
>        typeinfo for EchoCheck in libgearman.a(libgearman_libgearman_la-check.o)
>    NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
>    "operator delete(void*)", referenced from:
>        _gearman_client_free in libgearman.a(libgearman_libgearman_la-client.o)
>        gearman_universal_free(gearman_universal_st&) in libgearman.a(libgearman_libgearman_la-universal.o)
>        gearman_free_all_cons(gearman_universal_st&) in libgearman.a(libgearman_libgearman_la-universal.o)
>        CancelCheck::~CancelCheck() in libgearman.a(libgearman_libgearman_la-universal.o)
>        OptionCheck::~OptionCheck() in libgearman.a(libgearman_libgearman_la-universal.o)
>        gearman_packet_create_args(gearman_universal_st&, gearman_packet_st&, gearman_magic_t, gearman_command_t, void const**, unsigned long const*, unsigned long) in libgearman.a(libgearman_libgearman_la-packet.o)
>        gearman_packet_free(gearman_packet_st*) in libgearman.a(libgearman_libgearman_la-packet.o)
>        ...
>    "operator delete(void*, std::nothrow_t const&)", referenced from:
>        _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>        gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>        Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>        gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>        gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>        gearman_connection_copy(gearman_universal_st&, gearman_connection_st const&) in libgearman.a(libgearman_libgearman_la-connection.o)
>        ...
>    "operator new(unsigned long, std::nothrow_t const&)", referenced from:
>        _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>        gearman_task_internal_create(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>        gearman_task_mutable_result(gearman_task_st*) in libgearman.a(libgearman_libgearman_la-task.o)
>        Task::create_result(unsigned long) in libgearman.a(libgearman_libgearman_la-task.o)
>        gearman_request_option(gearman_universal_st&, gearman_string_t&) in libgearman.a(libgearman_libgearman_la-server_options.o)
>        gearman_connection_create(gearman_universal_st&, char const*, char const*) in libgearman.a(libgearman_libgearman_la-connection.o)
>        ...
>    "___cxa_begin_catch", referenced from:
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-universal.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-packet.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-task.o)
>        ___clang_call_terminate in libgearman.a(libgearman_libgearman_la-connection.o)
>    "___gxx_personality_v0", referenced from:
>        _client_allocate(gearman_client_st*, bool) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_clone in libgearman.a(libgearman_libgearman_la-client.o)
>        _client_do(gearman_client_st*, gearman_command_t, char const*, char const*, void const*, unsigned long, unsigned long*, gearman_return_t*) in libgearman.a(libgearman_libgearman_la-client.o)
>        _client_do_background(gearman_client_st*, gearman_command_t, gearman_string_t&, gearman_unique_t&, gearman_string_t&, char*) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_unique_status in libgearman.a(libgearman_libgearman_la-client.o)
>        gearman_client_run_block_tasks(Client*, gearman_task_st*) in libgearman.a(libgearman_libgearman_la-client.o)
>        _gearman_client_job_status in libgearman.a(libgearman_libgearman_la-client.o)
>        ...
>  ld: symbol(s) not found for architecture x86_64
>  clang: error: linker command failed with exit code 1 (use -v to see invocation)
>  make[1]: *** [docs/libgearman/examples/gearman_client_do_background_example] Error 1
>
>
>  Let me know if you need any more info or if I can help in any way.
>
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