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我正在尝试编译multiple_sources.cpp以在我的计算机上编译。我正在运行完全更新的 Xubuntu Lucid Lynx。

它将毫无问题地编译，g++ -c multiple_sources.cpp但是当我尝试链接并制作可执行文件时，g++ multiple_sources.o我得到：

multiple_sources.cpp:(.text+0x3d): undefined reference to `boost::program_options::options_description::m_default_line_length'
multiple_sources.cpp:(.text+0x87): undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int)'
multiple_sources.cpp:(.text+0x15a): undefined reference to `boost::program_options::options_description::add_options()'
multiple_sources.cpp:(.text+0x17b): undefined reference to `boost::program_options::options_description_easy_init::operator()(char const*, char const*)'
multiple_sources.cpp:(.text+0x193): undefined reference to `boost::program_options::options_description_easy_init::operator()(char const*, char const*)'
multiple_sources.cpp:(.text+0x1af): undefined reference to `boost::program_options::options_description_easy_init::operator()(char const*, boost::program_options::value_semantic const*, char const*)'
multiple_sources.cpp:(.text+0x1eb): undefined reference to `boost::program_options::options_description::m_default_line_length'
multiple_sources.cpp:(.text+0x252): undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int)'
...

等等令人作呕。

我确实安装了库：

>ls -l /usr/lib/libboost_program_options*
-rw-r--r-- 1 root root 640800 2010-03-31 21:19 /usr/lib/libboost_program_options.a
lrwxrwxrwx 1 root root     26 2010-04-09 00:57 /usr/lib/libboost_program_options-mt.a     -> libboost_program_options.a
lrwxrwxrwx 1 root root     34 2010-04-09 00:57 /usr/lib/libboost_program_options-mt.so -> libboost_program_options.so.1.40.0
lrwxrwxrwx 1 root root     34 2010-04-09 00:57 /usr/lib/libboost_program_options.so -> libboost_program_options.so.1.40.0
-rw-r--r-- 1 root root 289336 2010-03-31 21:19 /usr/lib/libboost_program_options.so.1.40.0

阅读 g++ 手册页后，我也尝试过：

  • g++ -llibboost_program_options multiple_sources.cpp
  • g++ -llibboost_program_options.a multiple_sources.cpp
  • g++ -llibboost_program_options.so multiple_sources.cpp
  • 以及上述所有内容-L/usr/lib 之前-l

它们都因以下变化而失败：

/usr/bin/ld: cannot find -llibboost_program_options.so
collect2: ld returned 1 exit status

我究竟做错了什么？

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1 回答 1

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-l参数错误；摆脱lib前缀并使用-lboost_program_options.

链接器希望所有库都以 开头lib，并在指定库时将其关闭。

您还可以在文件列表中包含库的完整路径，不包括-l（例如g++ multiple_sources.cpp /usr/lib/libboost_program_options.so），但对于系统库，最好遵循约定；它们并不总是安装在/usr/lib.

于 2010-07-28T17:08:05.507 回答