[Bug target/65464] [4.8/4.9 Regression] disabling multilib support for powerpc64le-linux-gnu breaks kernel builds

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65464

--- Comment #7 from Alan Modra <amodra at gmail dot com> ---
On x86_64-linux you can run 32-bit binaries.  On powerpc64le-linux you can't. 
It's that simple.  -m32 support in powerpc64le gcc, by default, doesn't make
sense until we have
- supported and tested compat layer in the kernel
- supported and tested gcc, binutils and glibc
We might even want to change the 32-bit ABI for powerpcle.

The change I made wasn't "just to be able to omit" --disable-multilib.  It was
also to fix the wrong default of enabling -m32 support in powerpc64le gcc.

Another data point: llvm doesn't support -m32