[Bug stdio/13960] New: #defining _LARGEFILE_SOURCE does not give me ftello

[Bug stdio/13960] New: #defining _LARGEFILE_SOURCE does not give me ftello

[giecrilj at stegny dot 2a.pl]

http://sourceware.org/bugzilla/show_bug.cgi?id=13960

             Bug #: 13960
           Summary: #defining _LARGEFILE_SOURCE does not give me ftello
           Product: glibc
           Version: 2.14
            Status: NEW
          Severity: normal
          Priority: P2
         Component: stdio
        AssignedTo: unassigned@sourceware.org
        ReportedBy: giecrilj@stegny.2a.pl
    Classification: Unclassified


Created attachment 6330
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6330
does not compile with gcc -ansi

== Steps to reproduce ==
{ gcc -c -ansi off_t.c; }

== Expected result ==
off_t.o

== Actual result ==
off_t.c:8:8: error: expected declaration specifiers or ‘...’ before ‘*’ token

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[Bug stdio/13960] #defining _LARGEFILE_SOURCE does not give me ftello

[aj at suse dot de]

http://sourceware.org/bugzilla/show_bug.cgi?id=13960

Andreas Jaeger <aj at suse dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |UNCONFIRMED
                 CC|                            |aj at suse dot de
     Ever Confirmed|1                           |0

--- Comment #1 from Andreas Jaeger <aj at suse dot de> 2012-04-08 09:47:22 UTC ---
You get ftello - just run it through gcc -E -ansi.

What you don't get is off_t - you have __off_t only.

And the feature test macro for off_t has a check for 
__USE_XOPEN2K8.

So, add a define of _XOPEN_SOURCE to 700 as well.

I'm not sure whether this is really a bug in glibc or in your usage of the
flags.

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[Bug stdio/13960] #defining _LARGEFILE_SOURCE does not give me ftello

[ondra at iuuk dot mff.cuni.cz]

http://sourceware.org/bugzilla/show_bug.cgi?id=13960

OndrejBilka <ondra at iuuk dot mff.cuni.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ondra at iuuk dot
                   |                            |mff.cuni.cz
         Resolution|                            |WORKSFORME

--- Comment #2 from OndrejBilka <ondra at iuuk dot mff.cuni.cz> 2013-05-09 17:25:33 UTC ---
Closing as we did not get response in year if problem persists.

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[Bug stdio/13960] #defining _LARGEFILE_SOURCE does not give me ftello

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=13960

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug stdio/13960] #defining _LARGEFILE_SOURCE does not give me ftello

[giecrilj at stegny dot 2a.pl]

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https://sourceware.org/bugzilla/show_bug.cgi?id=13960

Christopher Yeleighton <giecrilj at stegny dot 2a.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                URL|                            |file:///usr/share/doc/glibc
                   |                            |/Feature-Test-Macros.html#F
                   |                            |eature-Test-Macros
   Last reconfirmed|                            |2014-06-29
            Version|2.14                        |2.18
         Resolution|WORKSFORME                  |---
     Ever confirmed|0                           |1

--- Comment #3 from Christopher Yeleighton <giecrilj at stegny dot 2a.pl> ---
Let’s put some order in this, shall we?

It is documented that if _LARGEFILE_SOURCE is #defined then ftello is
available.  The default meaning of the word is ‘available as documented’ and
not ‘somewhat available’ as your explanation seems to imply — and ftello is
documented to return off_t, not __off_t.

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Subject: [Bug math/17097] ldbl-128 powl bad sign in overflow cases
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https://sourceware.org/bugzilla/show_bug.cgi?id\x17097

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;híea402804bce917cfd7cd1af76212e6364c23db

commit edea402804bce917cfd7cd1af76212e6364c23db
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Sun Jun 29 11:49:08 2014 +0000

    Fix ldbl-128 powl sign of result in overflow / underflow cases (bug 17097).

    This patch fixes bug 17097, ldbl-128 powl producing overflowing /
    underflowing results with positive sign when the result should have
    been negative.  This was shown up by the tests in non-default rounding
    modes added by my patch for bug 16315, but isn't actually limited to
    non-default rounding modes: rather, when rounding to nearest the
    wrappers produced a result with the correct sign and so always hid the
    bug unless -lieee was used to disable the wrappers.  The problem is
    that in the cases where Y is large enough that the result overflows or
    underflows for X not very close to 1, but not large enough to overflow
    or underflow for all X != +/- 1 (in the latter case Y is always an
    even integer), a positive overflowing / underflowing result is always
    returned, rather than one with the correct sign.  This patch moves the
    relevant part of computation of the sign earlier and returns a result
    of the correct sign.

    Tested for mips64.

        [BZ #17097]
        * sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Return
        result with correct sign in case of exponents that produce
        overflow except for X very close to 1.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                         |    7 +++++++
 NEWS                              |    2 +-
 sysdeps/ieee754/ldbl-128/e_powl.c |   26 +++++++++++++-------------
 3 files changed, 21 insertions(+), 14 deletions(-)

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