[Bug stdio/18542] swscanf vswscanf namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=18542

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=45dcd79f6eb37ad4e9e6967f1d459ffc3629eb1f

commit 45dcd79f6eb37ad4e9e6967f1d459ffc3629eb1f
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Jun 17 20:15:22 2015 +0000

    Fix swscanf vswscanf namespace (bug 18542).

    swscanf (added in C90 Amendment 1, present in UNIX98) calls vswscanf
    (added in C99, not in C90 Amendment 1 or UNIX98).  This patch fixes
    this by using __vswscanf instead and making vswscanf into a weak
    alias.

    (I intend to add conform/ test support for C90 Amendment 1 - and
    various other standard versions supported by glibc but not yet by
    conform/ tests - at some point, once the results for currently tested
    standards are cleaner.)

    Tested for x86_64 and x86 (testsuite, and that installed stripped
    shared libraries are unchanged by the patch).

        [BZ #18542]
        * libio/iovswscanf.c (__vswscanf): Use libc_hidden_def.
        (vswscanf): Use ldbl_weak_alias instead of ldbl_strong_alias
        * include/wchar.h (__vswscanf): Declare.  Use libc_hidden_proto.
        * libio/swscanf.c (__swscanf): Call __vswscanf instead of
        vswscanf.
        * conform/Makefile (test-xfail-UNIX98/wchar.h/linknamespace):
        Remove variable.

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

Summary of changes:
 ChangeLog          |    9 +++++++++
 NEWS               |    2 +-
 conform/Makefile   |    1 -
 include/wchar.h    |    4 ++++
 libio/iovswscanf.c |    3 ++-
 libio/swscanf.c    |    2 +-
 6 files changed, 17 insertions(+), 4 deletions(-)

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