[Bug libc/16907] <argp.h> compiled with --std=cXX disables __attribute__

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16907

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=58ef663c94e0bf21e88af6afce13b62d723cc415

commit 58ef663c94e0bf21e88af6afce13b62d723cc415
Author: Florian Weimer <fweimer@redhat.com>
Date:   Thu Aug 18 11:15:42 2016 +0200

    argp: Do not override GCC keywords with macros [BZ #16907]

    glibc provides fallback definitions already.  It is not necessary to
    suppress warnings for unknown attributes because GCC does this
    automatically for system headers.

    This commit does not sync with gnulib because gnulib has started to use
    _GL_* macros in the header file, which are arguably in the gnulib
    implementation space and not suitable for an installed glibc header
    file.

    (cherry picked from commit 2c820533c61fed175390bc6058afbbe42d2edc37)

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

Summary of changes:
 ChangeLog             |    8 ++++++++
 argp/argp-fmtstream.h |   19 ++++---------------
 argp/argp.h           |   42 ++----------------------------------------
 3 files changed, 14 insertions(+), 55 deletions(-)

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