[LLVMdev] [BUG] Support for -W[no-]unused-but-set-{variable, parameter}

[Ramkumar Ramachandra]

Hi,

These warnings are included by default with -Wall in GCC 4.6 [1], and
LLVM should support them instead of throwing -Wunknown-warning-option.

[1]: http://gcc.gnu.org/gcc-4.6/porting_to.html

Thanks.