[Bug target/115800] PowerPC GCC cannot build a little endian compile if --with-cpu=power5 is used

[meissner at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115800

--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
And libstdc++-v3 errors are similar:

mkdir -p ./powerpc64le-unknown-linux-gnu/bits/stdc++.h.gch
/home/meissner/fsf-build-ppc64le/work171-p5/./gcc/xgcc -shared-libgcc
-B/home/meissner/fsf-build-ppc64le/work171-p5/./gcc -nostdinc++
-L/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/src
-L/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/home/meissner/fsf-install-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/bin/
-B/home/meissner/fsf-install-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/lib/
-isystem
/home/meissner/fsf-install-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/include
-isystem
/home/meissner/fsf-install-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/sys-include
   -x c++-header -nostdinc++ -g -O2 -D_GNU_SOURCE 
-I/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/meissner/fsf-src/work171/libstdc++-v3/libsupc++  -O2 -g
/home/meissner/fsf-src/work171/libstdc++-v3/include/precompiled/stdc++.h -o
powerpc64le-unknown-linux-gnu/bits/stdc++.h.gch/O2g.gch
In file included from
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:63,
                 from
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/algorithm:60,
                 from
/home/meissner/fsf-src/work171/libstdc++-v3/include/precompiled/stdc++.h:51:
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:224:38:
error: ‘__ieee128’ was not declared in this scope; did you mean ‘__int128’?
  224 |     struct __numeric_traits_floating<__ieee128>
      |                                      ^~~~~~~~~
      |                                      __int128
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:224:47:
error: template argument 1 is invalid
  224 |     struct __numeric_traits_floating<__ieee128>
      |                                               ^
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:232:29:
error: ‘__ieee128’ was not declared in this scope; did you mean ‘__int128’?
  232 |     struct __numeric_traits<__ieee128>
      |                             ^~~~~~~~~
      |                             __int128
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:232:38:
error: template argument 1 is invalid
  232 |     struct __numeric_traits<__ieee128>
      |                                      ^
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:233:40:
error: ‘__ieee128’ was not declared in this scope; did you mean ‘__int128’?
  233 |     : public __numeric_traits_floating<__ieee128>
      |                                        ^~~~~~~~~
      |                                        __int128
/home/meissner/fsf-build-ppc64le/work171-p5/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ext/numeric_traits.h:233:49:
error: template argument 1 is invalid
  233 |     : public __numeric_traits_floating<__ieee128>
      |                                                 ^