id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4578	asio: always use pselect() on hpux11.31 over select()	Michael Haubenwallner <michael.haubenwallner@…>	chris_kohlhoff	"Using <boost/asio.hpp> with gcc (4.2.4) on hpux11.31 results in this error with boost-1.39.0:

/path/to/boost/asio/detail/socket_ops.hpp: In
function 'int boost::asio::detail::socket_ops::select(int, fd_set*, fd_set*,
fd_set*, timeval*, boost::system::error_code&)':
/path/to/boost/asio/detail/socket_ops.hpp:647:
error: cannot convert 'fd_set*' to 'int*' for argument '2' to 'int
select(size_t, int*, int*, int*, const timeval*)'

Unfortunately, the application has included <time.h> before <boost/asio.hpp> - and thus before <sys/time.h>. This causes select() to be declared with 'int*' instead of 'fd_set*' arguments.

Since hpux11.31, there is pselect() in <sys/select.h>.
Before hpux11.31, there is no <sys/select.h> (and no pselect).
Additionally, hpux11.31 defines {double _}SELECT in <sys/time.h>, so it seems to be better to listen to this one instead of _HP_aCC when deciding to use pselect().

Attached patch is for boost-1.39.0, but this code looks unchanged in trunk (parts of socket_ops.hpp were moved to impl/socket_ops.ipp).

Thank you!"	Patches	closed	To Be Determined	asio	Boost Development Trunk	Problem	fixed