[Bug libc/15105] Extra PLT references with -Os

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https://sourceware.org/bugzilla/show_bug.cgi?id=15105

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=54412d20618b7b93f136a168e788573575f8a7a6

commit 54412d20618b7b93f136a168e788573575f8a7a6
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Feb 23 13:54:53 2018 +0000

    Use libc_hidden_* for tolower, toupper (bug 15105).

    Continuing the fixes for localplt test failures with -Os arising from
    functions not being inlined in that case, this patch fixes such
    failures for tolower and toupper by using libc_hidden_proto and
    libc_hidden_def.

    Tested for x86_64 (both that it removes this particular localplt
    failure for -Os, and that the testsuite continues to pass without
    -Os).

    2018-02-22  Joseph Myers  <joseph@codesourcery.com>

        [BZ #15105]
        * ctype/ctype.c (tolower): Use libc_hidden_def.
        (toupper): Likewise.
        * include/ctype.h [!_ISOMAC] (tolower): Use libc_hidden_proto.
        [!_ISOMAC] (toupper): Likewise.

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

Summary of changes:
 ChangeLog       |    8 ++++++++
 ctype/ctype.c   |    2 ++
 include/ctype.h |    3 +++
 3 files changed, 13 insertions(+), 0 deletions(-)

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