[Bug libc/22505] ldconfig processes include directive in locale-specific order

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https://sourceware.org/bugzilla/show_bug.cgi?id=22505

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7d38eb38977980efe703eac93645b1af5a5f8a0c

commit 7d38eb38977980efe703eac93645b1af5a5f8a0c
Author: Aurelien Jarno <aurelien@aurel32.net>
Date:   Sat Dec 16 12:25:41 2017 +0100

    ldconfig: set LC_COLLATE to C [BZ #22505]

    ldconfig supports `include' directives and use the glob function to
    process them. The glob function sort entries according to the LC_COLLATE
    category. When using a standard "include /etc/ld.so.conf.d/*.conf" entry
    in /etc/ld.so.conf, the order therefore depends on the locale used to
    run ldconfig. A few examples of locale specific order that might be
    disturbing in that context compared to the C locale:
    - The cs_CZ and sk_SK locales sort the digits after the letters.
    - The et_EE locale sorts the 'z' between 's' and 't'.

    This patch fixes that by setting LC_COLLATE to C in order to process
    files in deterministic order, independently of the locale used to launch
    ldconfig.

    NOTE: This should NOT be backported to older release branches.

    Changelog:
        [BZ #22505]
        * elf/ldconfig.c (main): Call setlocale to force LC_COLLATE to C.

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

Summary of changes:
 ChangeLog      |    5 +++++
 NEWS           |    4 ++++
 elf/ldconfig.c |    4 ++++
 3 files changed, 13 insertions(+), 0 deletions(-)

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