[Bug network/17722] Resolver inet_* namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=17722

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8ac5a76a99e51a91eac9cecbe941fc05ddf11e03

commit 8ac5a76a99e51a91eac9cecbe941fc05ddf11e03
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Dec 17 18:09:11 2014 +0000

    Fix resolver inet_* namespace (bug 17722).

    Parts of the resolver brought in by pthreads (at least) use inet_*
    functions that aren't in the 1995/6 edition of POSIX that introduced
    pthreads (or in one case, use __inet_aton which is then defined in the
    same file as non-weak inet_addr).  This patch fixes this by making the
    affected functions into weak alias for __inet_* and using those names
    in the problematic resolver code.

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

        [BZ #17722]
        * inet/inet_mkadr.c (inet_makeaddr): Rename to __inet_makeaddr and
        define as weak alias of __inet_makeaddr.
        * resolv/inet_addr.c (inet_addr): Rename to __inet_addr and define
        as weak alias of __inet_addr.
        * resolv/inet_pton.c (inet_pton): Rename to __inet_pton and define
        as weak alias of __inet_pton.  Use libc_hidden_weak.
        * include/arpa/inet.h (__inet_pton): Declare.  Use
        libc_hidden_proto.
        (inet_makeaddr): Don't use libc_hidden_proto.
        (__inet_makeaddr): Declare.  Use libc_hidden_proto.
        * resolv/res_init.c (__res_vinit): Use __inet_pton instead of
        inet_pton.  Use __inet_makeaddr instead of inet_makeaddr.
        * conform/Makefile (test-xfail-POSIX/pthread.h/linknamespace):
        Remove variable.
        (test-xfail-POSIX/sched.h/linknamespace): Likewise.
        (test-xfail-POSIX/time.h/linknamespace): Likewise.

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

Summary of changes:
 ChangeLog           |   20 ++++++++++++++++++++
 NEWS                |    3 ++-
 conform/Makefile    |    3 ---
 include/arpa/inet.h |    5 ++++-
 inet/inet_mkadr.c   |    5 +++--
 resolv/inet_addr.c  |    3 ++-
 resolv/inet_pton.c  |    6 ++++--
 resolv/res_init.c   |    4 ++--
 8 files changed, 37 insertions(+), 12 deletions(-)

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