Boost iostreams编译错误

Question

这是我的编译命令行：

g++ -std=c++11 -Wall -Wextra -g -lboost_iostreams cppfile.cpp -o bin

但是我遇到了以下错误：

/tmp/cclste3G.o: In function `trie::write_on_disk(char*)':
undefined reference to `boost::iostreams::zlib::default_strategy'
undefined reference to `boost::iostreams::zlib::deflated'
undefined reference to `boost::iostreams::zlib::default_compression'
/tmp/cclste3G.o: In function `boost::iostreams::basic_gzip_compressor<std::allocator<char> >::basic_gzip_compressor(boost::iostreams::gzip_params const&, int)':
/usr/include/boost/iostreams/filter/gzip.hpp:671: undefined reference to `boost::iostreams::zlib::best_compression'
/usr/include/boost/iostreams/filter/gzip.hpp:671: undefined reference to `boost::iostreams::zlib::best_speed'
/tmp/cclste3G.o: In function `boost::iostreams::detail::zlib_compressor_impl<std::allocator<char> >::zlib_compressor_impl(boost::iostreams::zlib_params const&)':
/usr/include/boost/iostreams/filter/zlib.hpp:338: undefined reference to `boost::iostreams::detail::zlib_base::zlib_base()'
/usr/include/boost/iostreams/filter/zlib.hpp:338: undefined reference to `boost::iostreams::detail::zlib_base::~zlib_base()'
/tmp/cclste3G.o: In function `boost::iostreams::detail::zlib_compressor_impl<std::allocator<char> >::~zlib_compressor_impl()':
/usr/include/boost/iostreams/filter/zlib.hpp:343: undefined reference to `boost::iostreams::detail::zlib_base::reset(bool, bool)'
/usr/include/boost/iostreams/filter/zlib.hpp:343: undefined reference to `boost::iostreams::detail::zlib_base::~zlib_base()'
/tmp/cclste3G.o: In function `void boost::iostreams::detail::zlib_base::init<std::allocator<char> >(boost::iostreams::zlib_params const&, bool, boost::iostreams::detail::zlib_allocator<std::allocator<char>, boost::iostreams::detail::zlib_allocator_traits<std::allocator<char> >::type>&)':
/usr/include/boost/iostreams/filter/zlib.hpp:185: undefined reference to `boost::iostreams::detail::zlib_base::do_init(boost::iostreams::zlib_params const&, bool, void* (*)(void*, unsigned int, unsigned int), void (*)(void*, void*), void*)'
/tmp/cclste3G.o: In function `boost::iostreams::detail::zlib_compressor_impl<std::allocator<char> >::filter(char const*&, char const*, char*&, char*, bool)':
/usr/include/boost/iostreams/filter/zlib.hpp:350: undefined reference to `boost::iostreams::detail::zlib_base::before(char const*&, char const*, char*&, char*)'
/usr/include/boost/iostreams/filter/zlib.hpp:351: undefined reference to `boost::iostreams::zlib::finish'
/usr/include/boost/iostreams/filter/zlib.hpp:351: undefined reference to `boost::iostreams::zlib::no_flush'
/usr/include/boost/iostreams/filter/zlib.hpp:351: undefined reference to `boost::iostreams::detail::zlib_base::xdeflate(int)'
/usr/include/boost/iostreams/filter/zlib.hpp:352: undefined reference to `boost::iostreams::detail::zlib_base::after(char const*&, char*&, bool)'
/usr/include/boost/iostreams/filter/zlib.hpp:353: undefined reference to `boost::iostreams::zlib_error::check(int)'
/usr/include/boost/iostreams/filter/zlib.hpp:354: undefined reference to `boost::iostreams::zlib::stream_end'
/tmp/cclste3G.o: In function `boost::iostreams::detail::zlib_compressor_impl<std::allocator<char> >::close()':
/usr/include/boost/iostreams/filter/zlib.hpp:358: undefined reference to `boost::iostreams::detail::zlib_base::reset(bool, bool)'

我使用-lboost_iostreams，所以我不理解为什么会出现这个错误。

问候。

- Fractale

---

如果你在 cppfile.cpp 后面加上 -lboost_iostreams，它能正常工作吗？ - SurvivalMachine

@SurvivalMachine 是的，它可以工作 :D 谢谢！这怎么可能呢 ^^" - Fractale

@perecastor: 链接器标志的顺序很重要。 - ildjarn

Answer 1

您可以通过在cppfile.cpp之后添加链接器标志-lboost_iostreams来解决此问题。顺序很重要。

- SurvivalMachine

Answer 2

#Before all please install zlib library
apt-get install zlib1g
apt-get install zlib1g-dev

#Try to add [ -lz ] option in command line
g++ -std=c++11 -Wall -Wextra -g -lboost_iostreams -lz cppfile.cpp -o bin

#If mentioned don't work, find exact position of libz.so and add -L option in command line 
g++ -std=c++11 -Wall -Wextra -g -lboost_iostreams -lz cppfile.cpp -o bin -L/usr/share

- Amit Vujic