checking dependency style of /opt/D1/buildroot-2021/output/host/bin/riscv64-unknown-linux-gnu-gcc... none
checking for diff -u... yes
checking for /opt/D1/buildroot-2021/output/host/bin/riscv64-unknown-linux-gnu-gcc option to accept ISO C99... (cached) -std=gnu99
checking for a supported version of gcc... ok (8.1.0)
checking build system type... x86_64-pc-linux-gnu
checking host system type... riscv64-buildroot-linux-gnu
checking for a supported CPU... no (riscv64)
configure: error: Unsupported host architecture. Sorry
package/pkg-generic.mk:231: recipe for target '/opt/D1/buildroot-2021/output/build/valgrind-3.16.1/.stamp_configured' failed
make[1]: *** [/opt/D1/buildroot-2021/output/build/valgrind-3.16.1/.stamp_configured] Error 1
Makefile:84: recipe for target '_all' failed
make: *** [_all] Error 2
确实没办法编译成功了，看了一下，要照着mips64改很多处。