[Bug libgcc/83112] New: Silence warnings from PowerPC libgcc float128-ifunc.c compilation

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83112

            Bug ID: 83112
           Summary: Silence warnings from PowerPC libgcc float128-ifunc.c
                    compilation
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: meissner at gcc dot gnu.org
  Target Milestone: ---

The ifunc handlers in libgcc to switch between using PowerPC ISA 2.07 software
emulation for IEEE 128-bit floating point and ISA 3.0 hardware instructions get
a lot of warnings due to the new option -Wattribute-alias.

The solution is to change the ifunc handler from returning void * to a pointer
to the appropriate function.