[uClibc] trying to build uclibc toolchain for powerpc e500 core

[Kylo Ginsberg]

Hello,

I'm trying to build a uclibc-based toolchain for the powerpc e500 core.  
I'm using buildroot and specifying "--with-cpu=8540" under Additional 
Gcc Options.  However, the resultant binaries include load and store 
string instructions (e.g. lswi, stswi, etc), which aren't supported by 
the e500 core.

I can work around this for applications by specifying "-mno-string" as a 
gcc option, but:
a) this should be obviated by specifying a processor which doesn't 
support those instructions,
b) I haven't figured out how to pass "-mno-string" down to the lib 
builds, so I have no workaround there

I'm new to the subtleties of building gcc toolchains, so I'm likely 
doing something ignorant.  Any help or pointers will be greatly appreciated.

Cheers,
Kylo