GCC 4.8 libgfortran build fail

[David Johnson]

I am trying to build GCC on a core2-apple-darwin12.3.0 i386 machine. The 
configure seems to go through without problems but when I invoke 'make' 
it returns an error.

In file included from ./kinds.h:75:0,
                  from /gcc-4.8.0/libgfortran/libgfortran.h:232,
                  from /gcc-4.8.0/libgfortran/fmain.c:4:
/gcc-4.8.0/libgfortran/kinds-override.h:40:5: error: #error "Where has 
__float128 gone?"
  #   error "Where has __float128 gone?"
      ^
make[3]: *** [fmain.lo] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-target-libgfortran] Error 2
make: *** [all] Error 2

I have tried a few of the patches listed online for prior versions of 
GCC but nothing has worked thus far.