[Bug libc/17585] locale memmem namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=17585

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9975e3d37d8585b41db075321bade3495cf58cdb

commit 9975e3d37d8585b41db075321bade3495cf58cdb
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Nov 12 22:41:03 2014 +0000

    Fix locale memmem namespace (bug 17585).

    Locale code, brought in by ISO C functions, calls memmem, which is not
    an ISO C function.  This isn't an ISO C conformance bug, because all
    mem* names are reserved, but glibc practice is not to rely on that
    reservation (thus, memmem is only declared in string.h if __USE_GNU
    even though ISO C would allow it to be declared unconditionally, for
    example).  This patch changes that code to use __memmem.

    Note: there are uses of memmem elsewhere in glibc that I didn't
    change, although it may turn out some of those also need to use
    __memmem.

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

        [BZ #17585]
        * string/memmem.c [!_LIBC] (__memmem): Define to memmem.
        (memmem): Rename to __memmem and define as weak alias of
        __memmem.  Use libc_hidden_weak.
        (__memmem): Use libc_hidden_def.
        * include/string.h (__memmem): Declare.  Use libc_hidden_proto.
        * locale/findlocale.c (valid_locale_name): Use __memmem instead of
        memmem.

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

Summary of changes:
 ChangeLog           |    9 +++++++++
 NEWS                |    2 +-
 include/string.h    |    2 ++
 locale/findlocale.c |    4 ++--
 string/memmem.c     |    9 ++++++---
 5 files changed, 20 insertions(+), 6 deletions(-)

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