[Bug preprocessor/47047] New: Support for path translation in __FILE__

[Bug preprocessor/47047] New: Support for path translation in __FILE__

[joerg at netbsd dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

           Summary: Support for path translation in __FILE__
           Product: gcc
           Version: 4.1.3
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: joerg@netbsd.org


Created attachment 22841
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22841
Implement cpp -iremap

__FILE__ expands to full path names in some situation, e.g. if it is used in a
header found via -I/some/where. The resulting leak of the header location into
the file binary is undesirable in certain situations.

For NetBSD, two relevant cases are the visiblity protection in pkgsrc, which
effectively turns /usr/pkg/include/foo into /.../work/.buildlink/include/foo
and cross-compiling the system, which would leak /.../usr/include/foo instead
of /usr/include/foo or the location of the source tree.

The attached patch implements a CPP option to match the file path against a
list of prefixes and substitute the prefix on match. With this patch, most
references to the src and obj locations in NetBSD can be translated into the
canonical positions.

The patch is the version included in NetBSD against the system gcc, it can be
updated if necessary.

[Bug preprocessor/47047] Support for path translation in __FILE__

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2010-12-23 12:16:37 UTC ---
On Thu, 23 Dec 2010, joerg at netbsd dot org wrote:

> The patch is the version included in NetBSD against the system gcc, it can be
> updated if necessary.

Who are the authors of this patch?  It's large enough that it can't be 
considered without a copyright assignment on file with the FSF (and given 
such an assignment a version against trunk would then need to be 
submitted).

[Bug preprocessor/47047] Support for path translation in __FILE__

[joerg at britannica dot bec.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

--- Comment #2 from joerg at britannica dot bec.de 2010-12-23 12:51:33 UTC ---
On Thu, Dec 23, 2010 at 12:16:40PM +0000, joseph at codesourcery dot com wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047
> 
> --- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2010-12-23 12:16:37 UTC ---
> On Thu, 23 Dec 2010, joerg at netbsd dot org wrote:
> 
> > The patch is the version included in NetBSD against the system gcc, it can be
> > updated if necessary.
> 
> Who are the authors of this patch?  It's large enough that it can't be 
> considered without a copyright assignment on file with the FSF (and given 
> such an assignment a version against trunk would then need to be 
> submitted).

I am the author of the text. Where can I find the papers for the FSF?

Joerg

[Bug preprocessor/47047] Support for path translation in __FILE__

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2010-12-23 16:13:53 UTC ---
On Thu, 23 Dec 2010, joerg at britannica dot bec.de wrote:

> > On Thu, 23 Dec 2010, joerg at netbsd dot org wrote:
> > 
> > > The patch is the version included in NetBSD against the system gcc, it can be
> > > updated if necessary.
> > 
> > Who are the authors of this patch?  It's large enough that it can't be 
> > considered without a copyright assignment on file with the FSF (and given 
> > such an assignment a version against trunk would then need to be 
> > submitted).
> 
> I am the author of the text. Where can I find the papers for the FSF?

Please fill in the form at
http://gcc.gnu.org/wiki/CopyrightAssignment
and send it to fsf-records@gnu.org and they will then send you the 
appropriate assignment form.

[Bug preprocessor/47047] Support for path translation in __FILE__

[joerg at netbsd dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

--- Comment #4 from Joerg Sonnenberger <joerg at netbsd dot org> 2011-02-06 04:10:12 UTC ---
(In reply to comment #3)
> Please fill in the form at
> http://gcc.gnu.org/wiki/CopyrightAssignment
> and send it to fsf-records@gnu.org and they will then send you the 
> appropriate assignment form.

Done and processed.

[Bug preprocessor/47047] Support for path translation in __FILE__

[dank at kegel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

dank at kegel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dank at kegel dot com

--- Comment #5 from dank at kegel dot com 2013-04-07 21:29:20 UTC ---
What's the status of this patch?

[Bug preprocessor/47047] Support for path translation in __FILE__

[joerg at netbsd dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

--- Comment #6 from Joerg Sonnenberger <joerg at netbsd dot org> 2013-04-08 08:11:45 UTC ---
Nothing has changed. It likely needs updates to apply to GCC 4.8+, but the
general functionality is still desirable, IMO.

[Bug preprocessor/47047] Support for path translation in __FILE__

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47047

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Yes this is a dup.

*** This bug has been marked as a duplicate of bug 70268 ***