[Bug libc/20094] stdlib.h should not declare grantpt, ptsname, unlockpt for XPG3

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https://sourceware.org/bugzilla/show_bug.cgi?id=20094

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0014680d6a5bdeb4fe17682450105ebed19f35da

commit 0014680d6a5bdeb4fe17682450105ebed19f35da
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue May 17 15:51:55 2016 +0000

    Do not declare grantpt, ptsname, unlockpt in stdlib.h for XPG3 (bug 20094).

    stdlib.h declares grantpt, ptsname, unlockpt for __USE_XOPEN.  This
    patch corrects the condition to __USE_XOPEN_EXTENDED (these functions
    are new in XPG4).

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

        [BZ #20094]
        * stdlib/stdlib.h (grantpt): Declare if [__USE_XOPEN_EXTENDED],
        not [__USE_XOPEN].
        (unlockpt): Likewise.
        (ptsname): Likewise.
        * conform/Makefile (test-xfail-XPG3/stdlib.h/conform): Remove
        variable.

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

Summary of changes:
 ChangeLog        |    8 ++++++++
 conform/Makefile |    1 -
 stdlib/stdlib.h  |    2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

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