I incline to set default abi by march if mabi is not given, rather than by mcpu.
one point is I don’t want to introduce an incompatible behavior with clang, and the rule of inference abi from march is already in clang. Nathan Sidwell <[email protected]>於 2025年11月9日 週日，01:43寫道： > We have multiple cpus with different abis (combinations of 32 vs 64, float > vs > no-float, etc). It's annoying having to specify both -mcpu=thing and the > correct -mabi=thing. Just as with -mcpu selecting a default ISA set, this > adds > smarts for it to select a default ABI. > > You can still specify -mabi if you want to go off-road, but this gives us > one > source of truth. It's possible I've made a mistake with selecting the > default > abi for the current set of cpus. > > Also while there, cleaned up riscv_expend_arch_from_cpu. I found it over > complex, and as it's potentially getting data from a user-provided specs > file, > best not to use asserts for errors, just fail safely. > > nathan > -- > Nathan Sidwell >
