Question on LTO -plugin-opt

Hi

I saw there is no one target passes driver’s -mabi option to LTO code generation,
ex. pass driver option -mabi=ooo as -plugin-opt=-target-abi=ooo to LTO.
Does anyone know the reason for this?

I know there are some options are encoded in bitcode function attributes (ex. -target-feature, -Os, -Oz),
but I didn’t see -mabi, is it a good idea to pass -mabi vai option only for specific target?
or maybe usually targets use -triple and -mcpu to decide -mabi?

Thanks. Regards

Zakk Chen