[Bug math/21987] [sparc32] wrong bits/long-double.h installed

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https://sourceware.org/bugzilla/show_bug.cgi?id=21987

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3f68c5c9b61600f0f85c75bac15b1520d5059359

commit 3f68c5c9b61600f0f85c75bac15b1520d5059359
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Aug 22 00:59:43 2017 +0000

    Fix sparc32 bits/long-double.h (bug 21987).

    My refactoring of long double information

    commit 0acb8a2a855395c25b1feef2470f4d7ca4bed589
    Author: Joseph Myers <joseph@codesourcery.com>
    Date:   Wed Dec 14 18:27:56 2016 +0000

        Refactor long double information into bits/long-double.h.

    resulted in sparc32 configurations installing the ldbl-opt version of
    bits/long-double.h instead of the intended
    sysdeps/unix/sysv/linux/sparc version.

    For sparc32 by itself, this is not a problem, since the ldbl-opt
    version is correct for sparc32.  However, both sparc32 and sparc64 are
    supposed to install sets of headers that work for both of them, so
    that a single sysroot, whichever order the libraries are built and
    installed in, works for both.  The effect of having the wrong version
    installed is that you end up with a miscompiled sparc64 libstdc++
    which fails glibc's configure tests for the C++ compiler.

    This patch moves the header from sysdeps/unix/sysv/linux/sparc to
    separate copies of the same file for sparc32 and sparc64, to ensure it
    comes before ldbl-opt in the sysdeps directory ordering.

    Tested with build-many-glibcs.py for sparc64-linux-gnu and
    sparcv9-linux-gnu.

        [BZ #21987]
        * sysdeps/unix/sysv/linux/sparc/bits/long-double.h: Remove file
        and copy to ...
        * sysdeps/unix/sysv/linux/sparc/sparc32/bits/long-double.h:
        ... here.
        * sysdeps/unix/sysv/linux/sparc/sparc64/bits/long-double.h:
        ... and here.

    (cherry picked from commit 80f91666fed71fa3dd5eb5618739147cc731bc89)

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

Summary of changes:
 ChangeLog                                          |   10 ++++++++++
 .../linux/sparc/{ => sparc32}/bits/long-double.h   |    0
 .../linux/sparc/{ => sparc64}/bits/long-double.h   |    0
 3 files changed, 10 insertions(+), 0 deletions(-)
 copy sysdeps/unix/sysv/linux/sparc/{ => sparc32}/bits/long-double.h (100%)
 rename sysdeps/unix/sysv/linux/sparc/{ => sparc64}/bits/long-double.h (100%)

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