以下初始示例来自 Boost.Program_options文档
// Copyright Vladimir Prus 2002-2004.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
/* The simplest usage of the library.
*/
#include <boost/program_options.hpp>
namespace po = boost::program_options;
#include <iostream>
#include <iterator>
using namespace std;
int main(int ac, char* av[])
{
try {
po::options_description desc("Allowed options");
desc.add_options()
("help", "produce help message")
("compression", po::value<double>(), "set compression level")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
cout << desc << "\n";
return 0;
}
if (vm.count("compression")) {
cout << "Compression level was set to "
<< vm["compression"].as<double>() << ".\n";
} else {
cout << "Compression level was not set.\n";
}
}
catch(exception& e) {
cerr << "error: " << e.what() << "\n";
return 1;
}
catch(...) {
cerr << "Exception of unknown type!\n";
}
return 0;
}
在 g++ ( live example ) 下编译、链接和运行正确,但在 clang ( live example ) 下没有错误
/tmp/main-47ef95.o: In function
boost::program_options::typed_value<double, char>::name() const': main.cpp:(.text._ZNK5boost15program_options11typed_valueIdcE4nameEv[_ZNK5boost15program_options11typed_valueIdcE4nameEv]+0x49): undefined reference to
boost::program_options::arg' /tmp/main-47ef95.o: In functionboost::program_options::validation_error::validation_error(boost::program_options::validation_error::kind_t, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)': main.cpp:(.text._ZN5boost15program_options16validation_errorC2ENS1_6kind_tERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESA_i[_ZN5boost15program_options16validation_errorC2ENS1_6kind_tERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESA_i]+0x39): undefined reference to
boost::program_options::validation_error::get_template(boost::program_options::validation_error::kind_t)' clang: error: linker command failed with exit code 1 (use -v to see invocation)
问题:给出了什么?
最佳答案
GCC C++ ABI changed in version 5这可能会导致某些对象不兼容:
Users just need to make sure that they are building with the ABI used by the libraries that they depend on.
我认为您的 boost 版本可能是使用 GCC 5 构建的(CoLiRu 安装了 5.2),并且生成的库与 clang++ 对象不兼容。
This blog post讨论 GCC5 和 Clang 兼容性,并链接到 open LLVM bug to restore ABI interop with GCC .
关于c++ - Boost.Program_options 在 Clang 下没有正确链接,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34387406/