- disable NSH_SYMTAB to avoid build errors with cmake. - enable LIBM to avoid build errors with Ubuntu stock gcc-riscv64-unknown-elf toolchain. - use HELLO=y for easy use within qemu console. Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
- disable NSH_SYMTAB to avoid build errors with cmake. - enable LIBM to avoid build errors with Ubuntu stock gcc-riscv64-unknown-elf toolchain. - use HELLO=y for easy use within qemu console. Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>