backport: re PR other/42333 (complex division failure on darwin10 with -lm)

backport: re PR other/42333 (complex division failure on darwin10 with -lm)

2011-06-30  Jack Howarth  <howarth@bromo.med.uc.edu>

        Backport from mainline
        2011-02-07 Mike Stump  <mikestump@comcast.net>

        PR target/42333
        Add __ieee_divdc3 entry point.
        * config/i386/darwin.h (DECLARE_LIBRARY_RENAMES): Retain ___divdc3
        entry point.
        (SUBTARGET_INIT_BUILTINS): Call darwin_rename_builtins.
        * config/i386/i386.c (TARGET_INIT_LIBFUNCS): Likewise.
        * config/darwin.c (darwin_rename_builtins): Add.
        * config/darwin-protos.h (darwin_rename_builtins): Add.

From-SVN: r175711