问题描述
我正在尝试实现一个独立于平台的函数（在 Windows/Linux/Mac OS X 上工作），用于使用 boost/process.hpp 调用外部进程，如下所示：
#include <sstream>
#include <boost/process.hpp>
std::string execute_external_process(const std::string &command,const std::vector<std::string> &arguments) {
boost::process::ipstream out;
boost::process::child child(boost::process::search_path(command),arguments,boost::process::std_out > out,boost::process::std_err > out);
std::stringstream process_output_builder;
std::string line;
while (child.running() && std::getline(out,line) && !line.empty()) {
process_output_builder << line;
process_output_builder << "\n";
}
child.wait();
return process_output_builder.str();
}
但是，我收到以下 Boost 编译错误：
In file included from /usr/include/boost/process/async.hpp:35,from /usr/include/boost/process.hpp:23,from ../src/ExternalProcessUtils.cpp:4:
/bin/vcpkg/installed/x64-linux/include/boost/asio/io_service.hpp:27:20: error: conflicting declaration ‘typedef class boost::asio::io_context boost::asio::io_service’
27 | typedef io_context io_service;
| ^~~~~~~~~~
In file included from /usr/include/boost/process/detail/traits.hpp:11,from /usr/include/boost/process/async.hpp:32,from ../src/ExternalProcessUtils.cpp:4:
/usr/include/boost/process/detail/traits/async.hpp:15:7: note: prevIoUs declaration as ‘class boost::asio::io_service’
15 | class io_service;
| ^~~~~~~~~~
In file included from /usr/include/c++/10/bits/move.h:57,from /usr/include/c++/10/bits/stl_pair.h:59,from /usr/include/c++/10/bits/stl_algobase.h:64,from /usr/include/c++/10/vector:60,from ../src/ExternalProcessUtils.hpp:3,from ../src/ExternalProcessUtils.cpp:1:
/usr/include/c++/10/type_traits: In instantiation of ‘struct std::is_base_of<boost::asio::execution::detail::any_executor_base,boost::asio::io_service>’:
/bin/vcpkg/installed/x64-linux/include/boost/asio/execution/any_executor.hpp:1400:66: required by substitution of ‘template<class Executor> boost::asio::execution::any_executor<boost::asio::execution::context_as_t<boost::asio::execution_context&>,boost::asio::execution::detail::blocking::never_t<0>,boost::asio::execution::prefer_only<boost::asio::execution::detail::blocking::possibly_t<0> >,boost::asio::execution::prefer_only<boost::asio::execution::detail::outstanding_work::tracked_t<0> >,boost::asio::execution::prefer_only<boost::asio::execution::detail::outstanding_work::untracked_t<0> >,boost::asio::execution::prefer_only<boost::asio::execution::detail::relationship::fork_t<0> >,boost::asio::execution::prefer_only<boost::asio::execution::detail::relationship::continuation_t<0> > >::any_executor(Executor,typename std::enable_if<typename std::conditional<((! std::is_same<Executor,boost::asio::execution::any_executor<boost::asio::execution::context_as_t<boost::asio::execution_context&>,boost::asio::execution::prefer_only<boost::asio::execution::detail::relationship::continuation_t<0> > > >::value) && (! std::is_base_of<boost::asio::execution::detail::any_executor_base,Executor>::value)),boost::asio::execution::detail::is_valid_target_executor<Executor,void(boost::asio::execution::context_as_t<boost::asio::execution_context&>,boost::asio::execution::prefer_only<boost::asio::execution::detail::relationship::continuation_t<0> >)>,std::integral_constant<bool,false> >::type::value,void>::type*) [with Executor = boost::asio::io_service]’
/usr/include/boost/process/detail/posix/io_service_ref.hpp:125:63: required from here
/usr/include/c++/10/type_traits:1412:38: error: invalid use of incomplete type ‘class boost::asio::io_service’
1412 | : public integral_constant<bool,__is_base_of(_Base,_Derived)>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/boost/process/detail/traits.hpp:11,from ../src/ExternalProcessUtils.cpp:4:
/usr/include/boost/process/detail/traits/async.hpp:15:7: note: forward declaration of ‘class boost::asio::io_service’
15 | class io_service;
| ^~~~~~~~~~
...
我删除了剩余的错误消息，因为它很长。由于我的代码看起来不错，我想知道这是否是 Boost 中的错误。我使用的是最新版本 1.75.0，但此问题也在版本 1.74.0 中出现（这就是我更新的原因）。
关于如何解决这个问题的任何想法？
解决方法
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