PR 1660

points out that llvm-gcc-4.2 doesn't build on MacOSX PowerPC machines.
I believe that the gcc-4.2 target-specific code for this environment assumes that
gcc's XFloat mode (==128-bit long double) is supported, and makes no provision for the
possibility that it isn't. The dependency was introduced in FSF between 4.0 and 4.2.
That is, this isn't a recent regression (and the way to fix it, at least the best way if not
the quickest, is to implement PPC long double.)

Here is your chance to prove me wrong! Has anybody ever gotten this configuration to build?