[Bug time/20041] sys/time.h timespec namespace

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https://sourceware.org/bugzilla/show_bug.cgi?id=20041

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2faba597eca15666ce46cc721041747e96c8b942

commit 2faba597eca15666ce46cc721041747e96c8b942
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue May 3 23:36:18 2016 +0000

    Fix sys/time.h timespec namespace (bug 20041).

    For UNIX98 and older standards, sys/time.h should not define struct
    timespec, but does so via the inclusion of sys/select.h (which is a
    new header in the 2001 edition of POSIX, and defines struct timespec
    because of the declaration of pselect, a new function in the 2001
    edition of POSIX).  In turn, this affects some other headers that
    themselves include sys/time.h.

    This patch fixes this by conditioning the __need_timespec definition
    in sys/select.h on __USE_XOPEN2K, the same condition used there for
    the declaration of pselect (this has no effect on direct uses of
    sys/select.h with feature test macros for any standard that includes
    that header, since such standards result in __USE_XOPEN2K being
    defined).

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

        [BZ #20041]
        * misc/sys/select.h (__need_timespec): Only define if
        [__USE_XOPEN2K].
        * conform/Makefile (test-xfail-XPG4/sys/time.h/conform): Remove
        variable.
        (test-xfail-XPG4/utmpx.h/conform): Likewise.
        (test-xfail-UNIX98/sys/time.h/conform): Likewise.
        (test-xfail-UNIX98/utmpx.h/conform): Likewise.

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

Summary of changes:
 ChangeLog         |   11 +++++++++++
 conform/Makefile  |    4 ----
 misc/sys/select.h |    4 +++-
 3 files changed, 14 insertions(+), 5 deletions(-)

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