[Bug libc/18444] pathconf basename namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=18444

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cf06a4e3579d834c3330184c4ff127c98bc00fcc

commit cf06a4e3579d834c3330184c4ff127c98bc00fcc
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri May 22 17:09:36 2015 +0000

    Fix pathconf basename namespace (bug 18444).

    pathconf (sysdeps/unix/sysv/linux/pathconf.c) uses basename.  But
    pathconf is in POSIX back to 1990 while basename is only reserved with
    external linkage in those standards including XPG functions.  This
    patch fixes this namespace issue in the usual way, renaming basename
    to __basename and making it into a weak alias.

    Tested for x86_64 and x86 (testsuite, and that disassembly of
    installed shared libraries is unchanged by the patch).

        [BZ #18444]
        * string/basename.c (basename): Rename to __basename and define as
        weak alias of __basename.  Use libc_hidden_weak.
        * include/string.h (__basename): Declare.  Use libc_hidden_proto.
        * sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Call
        __basename instead of basename.
        * conform/Makefile (test-xfail-POSIX2008/unistd.h/linknamespace):
        Remove variable.
        (test-xfail-XOPEN2K8/unistd.h/linknamespace): Likewise.

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

Summary of changes:
 ChangeLog                          |   12 ++++++++++++
 NEWS                               |    2 +-
 conform/Makefile                   |    2 --
 include/string.h                   |    2 ++
 string/basename.c                  |    6 ++++--
 sysdeps/unix/sysv/linux/pathconf.c |    2 +-
 6 files changed, 20 insertions(+), 6 deletions(-)

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