[Bug math/18397] mips16 __fpu_control handling broken for static linking

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https://sourceware.org/bugzilla/show_bug.cgi?id=18397

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34cb304e5a6df706e186d504b69af974bfc15a2f

commit 34cb304e5a6df706e186d504b69af974bfc15a2f
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon May 11 22:58:10 2015 +0000

    Fix mips16 __fpu_control static linking (bug 18397).

    Programs are supposed to be able to define the __fpu_control variable,
    overriding the library's version to cause the floating-point control
    word to be set to the chosen value at startup.

    This is broken for mips16 for static linking because the library's
    __fpu_control variable is in the same object file as the helper
    functions used by fpu_control.h for mips16, so test-fpucw-ieee-static
    fails to link with multiple definitions of __fpu_control.

    This patch fixes this by putting the helpers in a separate file rather
    than overriding fpu_control.c.  Tested for mips16 that this fixes the
    link failure and the ABI tests still pass.

        [BZ #18397]
        * sysdeps/mips/mips32/fpu/fpu_control.c: Move to ....
        * sysdeps/mips/mips32/fpu/fpucw-helpers.c: ... here.  Include
        <fpu_control.h> instead of <math/fpu_control.c>.
        * sysdeps/mips/mips32/fpu/Makefile: New file.

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

Summary of changes:
 ChangeLog                                          |    8 ++++++++
 NEWS                                               |    2 +-
 .../{aarch64/soft-fp => mips/mips32/fpu}/Makefile  |    2 +-
 .../mips32/fpu/{fpu_control.c => fpucw-helpers.c}  |    2 +-
 4 files changed, 11 insertions(+), 3 deletions(-)
 copy sysdeps/{aarch64/soft-fp => mips/mips32/fpu}/Makefile (52%)
 rename sysdeps/mips/mips32/fpu/{fpu_control.c => fpucw-helpers.c} (97%)

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