"std::basic_stringbuf::str() const"问题的解决办法

今天用cocos2d-x 3.6版本创建了一个新的工程，用xocde编译后出现了N多个链接错误，错误如下：

Undefined symbols for architecture x86_64:

  "std::basic_stringbuf, std::allocator >::str() const", referenced from:

      umeng::Json::valueToQuotedString(char const*) in libMobClickCpp.a(json_writer.o)

  "std::basic_ios >::widen(char) const", referenced from:

      umeng::Json::valueToQuotedString(char const*) in libMobClickCpp.a(json_writer.o)

  "std::ostream::operator<<(int)", referenced from:

      umeng::Json::valueToQuotedString(char const*) in libMobClickCpp.a(json_writer.o)

  "std::string::_M_leak_hard()", referenced from:

      umeng::Json::StyledWriter::writeIndent() in libMobClickCpp.a(json_writer.o)

  "std::string::_Rep::_M_destroy(std::allocator const&)", referenced from:

      umeng::Json::Value::CommentInfo::setComment(char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::CZString::CZString(char const*, umeng::Json::Value::CZString::DuplicationPolicy) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::CZString::CZString(umeng::Json::Value::CZString const&) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(char const*, char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(std::string const&) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(umeng::Json::Value const&) in libMobClickCpp.a(json_value.o)

      ...

  "std::string::_Rep::_S_terminal", referenced from:

      char* std::string::_S_construct(char const*, char const*, std::allocator const&, std::forward_iterator_tag) in libMobClickCpp.a(json_value.o)

      char* std::string::_S_construct(char*, char*, std::allocator const&, std::forward_iterator_tag) in libMobClickCpp.a(json_writer.o)

  "std::string::_Rep::_S_empty_rep_storage", referenced from:

      umeng::Json::Value::CommentInfo::setComment(char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::CZString::CZString(char const*, umeng::Json::Value::CZString::DuplicationPolicy) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::CZString::CZString(umeng::Json::Value::CZString const&) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(char const*, char const*) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(std::string const&) in libMobClickCpp.a(json_value.o)

      umeng::Json::Value::Value(umeng::Json::Value const&) in libMobClickCpp.a(json_value.o)

      ...

  "std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator const&)", referenced from:

      char* std::string::_S_construct(char const*, char const*, std::allocator const&, std::forward_iterator_tag) in libMobClickCpp.a(json_value.o)

      char* std::string::_S_construct(char*, char*, std::allocator const&, std::forward_iterator_tag) in libMobClickCpp.a(json_writer.o)

  "std::string::append(char const*, unsigned long)", referenced from:

      umeng::Json::valueToQuotedString(char const*) in libMobClickCpp.a(json_writer.o)

      umeng::Json::FastWriter::write(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::FastWriter::writeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::write(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeCommentBeforeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeCommentAfterValueOnSameLine(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      ...

  "std::string::append(std::string const&)", referenced from:

      umeng::Json::valueToQuotedString(char const*) in libMobClickCpp.a(json_writer.o)

      umeng::Json::FastWriter::writeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeCommentBeforeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeCommentAfterValueOnSameLine(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::pushValue(std::string const&) in libMobClickCpp.a(json_writer.o)

      umeng::Json::StyledWriter::writeArrayValue(umeng::Json::Value const&) in libMobClickCpp.a(json_writer.o)

..................

后面还有很多这里就贴一部分出来，给以后出现同样问题的时候提个醒。

解决办法：Build Phases->Link Binary With Libraries  然后添加：libstdc++.6.0.9.dylib ，之后问题就消失。