On 13 August 2012 18:49, Jonathan Wakely wrote: > I suppose EOPNOTSUPP might be better, if it's supported everywhere. > EPERM has the advantage of being a documented error for > pthread_create.
We do define std::errc::operation_not_supported unconditionally on most platforms, but not mingw or djgpp. They don't necessarily support std::errc::operation_not_permitted either, and so far noone has made std::thread work on those targets anyway, so that's not a showstopper. e.g. terminate called after throwing an instance of 'std::system_error' what(): Enable multithreading to use std::thread: Operation not supported Aborted
