$ clang++ -c -stdlib=libc++ -I. hwy/per_target.cc
In file included from hwy/per_target.cc:28:
In file included from ./hwy/highway.h:629:
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e8mf8'
644 | HWY_RVV_FOREACH(HWY_RVV_LANES, Lanes, setvlmax_e, _ALL)
| ^
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e8mf8'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e8mf8'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e16mf4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e16mf4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e16mf4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e32mf2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e32mf2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e32mf2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e64m1'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m1'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m1'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e64m2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m2'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e64m4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvl_e64m4'
./hwy/ops/rvv-inl.h:644:17: error: use of undeclared identifier '__riscv_vsetvlmax_e64m8'
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.