Trouble following build instructions on Risc-V wiki page

[David Hutchinson]

I've been trying to build Risc-V, following the instructions on the Wiki page at https://wiki.freebsd.org/riscv and have encountered a few problems:

First, using the pre-packaged cross-compile tools, buildworld eventually fails with an "undefined reference _Unwind_Resume" error (Sorry. I didn't record where, and I've since wiped and started anew with the hand-built cross-compile tools

Second, the final step in the build toolchain section (the mv ${PREFIX}/lib/gcc/riscv64-unknown-freebsd11.2/8.1.0/include-fixed ${PREFIX}/lib/gcc/riscv64-unknown-freebsd11.2/8.1.0/include-fixed.rm
) gives a file not found error, as there is no include-fixed file or directory.

Third, the instructions to build world fail at make, because the instructions refer to FreeBSD-12.0 as the build tools (i.e. setenv CROSS_BINUTILS_PREFIX $PREFIX/riscv64-unknown-freebsd12.0/bin/ ), when FreeBSD-11.2 tools are built. I've made changes, and am now doing the make buildworld part.

I was going to see what works, and if I was successful, maybe think about making changes to the wiki page if I felt confident in my solution, but, well,  the captcha generator doesn't work, so I can't 
Create an account.

Thanks
David  Hutchinson