mac os安装protobuf 2.4错误解决方法

在编译安装protobuf 2.4时（具体安装方法可以google），出现如下错误： /bin/sh ../libtool --tag=CXX --mode=compile g -DHAVE_CONFIG_H -I. -I.. -D_THREAD_SAFE -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -O2 -g -DNDEBUG -MT messa

在编译安装protobuf 2.4时（具体安装方法可以google），出现如下错误：

/bin/sh ../libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I. -I..    -D_THREAD_SAFE  -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -O2 -g -DNDEBUG -MT message.lo -MD -MP -MF .deps/message.Tpo -c -o message.lo `test -f 'google/protobuf/message.cc' || echo './'`google/protobuf/message.cc
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I.. -D_THREAD_SAFE -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-compare -O2 -g -DNDEBUG -MT message.lo -MD -MP -MF .deps/message.Tpo -c google/protobuf/message.cc  -fno-common -DPIC -o .libs/message.o
google/protobuf/message.cc:130:60: error: implicit instantiation of undefined template 'std::__1::basic_istream >'
  return ParseFromZeroCopyStream(&zero_copy_input) && input->eof();
                                                           ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/iosfwd:108:28: note: template is declared here
    class _LIBCPP_TYPE_VIS basic_istream;
                           ^
google/protobuf/message.cc:135:67: error: implicit instantiation of undefined template 'std::__1::basic_istream >'
  return ParsePartialFromZeroCopyStream(&zero_copy_input) && input->eof();
                                                                  ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/iosfwd:108:28: note: template is declared here
    class _LIBCPP_TYPE_VIS basic_istream;
                           ^
google/protobuf/message.cc:175:16: error: implicit instantiation of undefined template 'std::__1::basic_ostream >'
  return output->good();
               ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/iosfwd:110:28: note: template is declared here
    class _LIBCPP_TYPE_VIS basic_ostream;
                           ^
3 errors generated.
make[2]: *** [message.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

错误提示的时，导错了，经过搜索和检查，发现需要修改

${PROTOBUF_HOME}/src/google/protobuf下的message.h文件，具体修改方式如下：

#ifdef __DECCXX
// HP C++'s iosfwd doesn't work.
#include
#else
#include
//#include
#endif