On Jul 13 13:27, Adam Dinwoodie wrote:
> Paul Keir wrote:
> >While running configure on llvm I get a hang on:
> >
> >...
> >checking for Graphviz... echo Graphviz
> >checking for dot...
> >
> >The configure script has a line starting:
> >if { test -f "$as_dir/$ac_word$ac_exec_ext" && ...
> >
> >The problem occurs when $as_dir is /
> >
> >test -f //dot
>
> This will be to do with how Windows and Linux handle UNC paths. On Windows
> and
> Cygwin, //dot refers to a network share called "dot". On Linux (or at
> least the
> RHEL6.2 system I just checked) //dot is a different way of expressing /dot.
>
> On RHEL:
>
> # mkdir /dot
> # [[ /dot -ef //dot ]] && echo They look the same to me
> They look the same to me
>
> On Cygwin:
>
> $ mkdir /dot
> $ [[ /dot -ef //dot ]] || echo "But Cygwin thinks they're different"
> But Cygwin thinks they're different
>
> >...also hangs (at least 15 mins.). I tested it on Linux and another-
> >cygwin machine, and test returns promptly there.
>
> So what's the difference between the two Cygwin setups? The versions of
> cygwin1.dll are probably most useful, although bear in mind "x worked with
> some
> old version of Cygwin" tends to gather little sympathy unless the behaviour is
> clearly a bug -- this isn't. At least to me.
Neither in terms of POSIX compatibility. See the next to last paragraph
of the "Pathname Resolution" chapter in the Open Group specs:
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_12
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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