Error while setting up ri5cy_gnu_toolchain

[Gianluca Roascio]

Hi,
when I send the command make ZERORISCY=1, after having cloned the ri5cy_gnu_toolchain repo, the process exits with the following:

if [ ! -e toolchain ]; then git clone https://github.com/riscv/riscv-gnu-toolchain.git toolchain; fi
cd toolchain && git checkout d038d596dc1d8e47ace22ab742cd40c2f22d659e
error: Your local changes to the following files would be overwritten by checkout:
	linux-headers/include/linux/netfilter/xt_CONNMARK.h
	linux-headers/include/linux/netfilter/xt_DSCP.h
	linux-headers/include/linux/netfilter/xt_MARK.h
	linux-headers/include/linux/netfilter/xt_RATEEST.h
	linux-headers/include/linux/netfilter/xt_TCPMSS.h
	linux-headers/include/linux/netfilter_ipv4/ipt_ECN.h
	linux-headers/include/linux/netfilter_ipv4/ipt_TTL.h
	linux-headers/include/linux/netfilter_ipv6/ip6t_HL.h
Please commit your changes or stash them before you switch branches.
Aborting
make: *** [build] Error 1

I'm using Mac OS Catalina 10.15.6. Is it supported or not?
Thank you