riscv: build: Support compiling kernel using Xuantie toolchain #14
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Compared to toolchains with gcc12 or above, the Xuantie toolchain gcc10 does not have vector support enabled by default, and -march needs to be explicitly specified. 1. Xuantie toolchain gcc10 does not support using AS_HAS_OPTION_ARCH to automatically detect vector extensions and enable it. 2. The ld tool version of Xuantie toolchain gcc10 is 2.35, which is less than the 2.38 required by TOOLCHAIN_HAS_V. Signed-off-by: Chen Pei <cp0613@linux.alibaba.com>
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Compared to toolchains with gcc12 or above, the Xuantie toolchain gcc10 does not have vector support enabled by default, and -march needs to be explicitly specified.