[PATCH] D71124: [RISCV] support clang driver to select cpu

[Jessica Clarke via Phabricator via cfe-commits]

jrtc27 added a comment.

In D71124#2423633 <https://reviews.llvm.org/D71124#2423633>, @oceanfish81 wrote:

> @khchen ,
> how should I obtain available (v)CPU features?
> Any sample code, that should work on RISC-V?

Probably `getauxval(AT_HWCAP)`; both Linux and FreeBSD put the ISA string in the low 26 bits in the same vein as `misa`.


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