Re: Gnulib's freopen replacement and MinGW

> From: Bruno Haible <[email protected]>
> Cc: [email protected]
> Date: Sat, 05 May 2012 16:26:55 +0200
> 
> > Diffutils 3.2 call xfreopen with its first argument NULL, expecting
> > the underlying reopen to handle this.  However, the MS runtime does
> > not implement the Posix semantics of such a call, and so, for example,
> > MinGW-compiled cmp fails when invoked to compare its stdin with a
> > file:
> > 
> >   D:\gnu\diffutils-3.2\src>cat cmp.c | cmp cmp.c -
> >   cmp: failed to reopen `stdin' with mode `rb': No such file or directory
> > 
> > The following change fixes this:
> > 
> > 2012-05-05  Eli Zaretskii  <[email protected]>
> > 
> > 	* lib/freopen.c [_WIN32]: Include io.h and fcntl.h.
> > 	(rpl_freopen) [_WIN32]: If the first argument is NULL, call
> > 	_setmode to switch STREAM to either binary or text mode, as
> > 	specified by MODE.
> 
> Thanks for the proposed patch, but the problem has already been fixed
> differently, by avoiding to use xfreopen() [1].

Thanks, that's good to know.