Re: Second ping: Re: Add a configure option to disable system header canonicalizations (issue6495088)

[Ollie Wild <aaw at google dot com>]

Tom, this is mainly a libcpp change.  Would you mind taking a look?

Thanks,
Ollie

On Mon, Oct 1, 2012 at 9:56 AM, Simon Baldwin <simonb@google.com> wrote:
>
> Ping, again.
>
>
> On 21 September 2012 12:45, Simon Baldwin <simonb@google.com> wrote:
> >
> > Ping.
> >
> > http://gcc.gnu.org/ml/gcc-patches/2012-09/msg00459.html
> >
> > Full text of previous message and context at URL above.  No comments
> > or code changes since.  Patch description left below for convenience.
> >
> > >
> > > Add flags to disable system header canonicalizations.
> > >
> > > Libcpp may canonicalize system header paths with lrealpath() for
> > > diagnostics,
> > > dependency output, and similar.  If gcc is held in a symlink farm the
> > > canonicalized paths may be meaningless to users, and will also
> > > conflict with
> > > build frameworks that (for example) disallow absolute paths to header
> > > files.
> > >
> > > This change adds -f[no-]canonical-system-headers to the gcc command
> > > line, and
> > > a configure option --[en/dis]able-canonical-system-headers to set
> > > default
> > > behaviour, allowing the user to select whether or not to implement
> > > r186991.
> > > Default is enabled.  See also PR c++/52974.
> > >
> > > Tested for regressions with bootstrap builds of C and C++, both with
> > > and
> > > without configure --disable-canonical-system-headers.
> >
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