Re: Type punned-pointers

[Ulrich Lauther]

Henrik Goldman <henrik_goldman@mail.tele.dk> wrote:
: Hi,

: I'm seeing a weird problem on hp-ux (ia64) using g++ 4.1.1.

: Here below is a tiny bit of code which sets up the nessecary code for doing
: a select():

: fd_set fdread, fdwrite;

: FD_ZERO(&fdread);

: FD_ZERO(&fdwrite);

: FD_SET(m_IncomingSocket.GetSocket(), &fdread);

: FD_SET(m_IncomingSocket.GetSocket(), &fdwrite);

: For the last two lines I get the following warning:

: warning: dereferencing type-punned pointer will break strict-aliasing rules
: warning: dereferencing type-punned pointer will break strict-aliasing rules

FD_SET is probably a macro. I would take a look at the expanded code, which
might try to do some illegal pointer assignment.




-- 
        -lauther

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