Re: [Mingw-users] Fwd: cygwin + --no-cygwin = MinGW ??

[KC <kc...@gm...>]

Hi Michael,

Thanks for the info.
ORBit2 is an implementation of CORBA 2.4 which is similar to DCOM
and it's the only implemenation of C language mapping of CORBA, AFAIK.


KC


On 3/27/06, Brian Dessent <br...@de...> wrote:
> KC wrote:
>
> > get better performance.  But I'm a little confused by cygwin and MinGW =
...
>
> The cygwin gcc packages include -mno-cygwin as a shortcut to compiling
> with the mingw toolchain.  It's really two different compilers, or at
> the very least two completely different C runtimes.
>
> Porting a *nix-like package to windows using mingw can sometimes be
> easy, but often it is quite difficult without some manual labor because
> of the fact that MSVCRT provides very little of the posix API past what
> the C language requires.  So if your app expects to do anything "unix
> like" such as fork/exec you either have to rewrite it using win32
> concepts or use an emulation library like Cygwin.  If you use Cygwin you
> can compile a much wider array of posix software out of the box without
> modification, but there is some overhead.
>
> I don't know anything about Orbit2, but it looks like it's network-IO
> bound.  If that is the case then I doubt that Cygwin has anything to do
> with the perceived latency, and I suggest that the difference is
> inherently a windows issue and won't change just because you avoid
> Cygwin.  There was a recent thread on the cygwin ML regarding Windows'
> poor implementation of the TCP/IP nagle algorithm, and the need to set
> TCP_NODELAY.  You might want to read that:
> <http://cygwin.com/ml/cygwin/2006-03/msg00424.html>
>
> On the other hand if the library is just doing network IO then it
> shouldn't be too hard to port to mingw, and it would seem that others
> have had success doing this with relatively few changes:
> <http://mail.gnome.org/archives/orbit-list/2006-February/msg00000.html>.
>
> Brian
>
>
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