Homogeneise risc-v test script with arm-m4 testing

[clebreto]

Problem was:

• risc-v test suite script adds additional and unnecessary constraints to the testing suite

Solution is:

• Remove the constraints while allowing to use user-defined assembly checker binaries to ease development on other distributions / package managers.
• Document how to set ASSEMBLY_CHECKER and ASSEMBLY_CHECKER_OPTIONS for macos brew.

[vbgl]

Do we need two files now that arm and risc-v testing are very similar?

[vbgl]

Is it really about macos & homebrew or is it just that you want to use the GNU toolchain rather than the LLVM one?

[clebreto]

Thanks for pointing this out.

You're right that the point is more about GCC vs LLVM than the OS / distribution (the message should be either changed / removed).

Nonetheless, as far as I am aware, the easiest way to get going with risc-v compilation on a mac-os system is to use the brew recipe: https://formulae.brew.sh/formula/riscv64-elf-gcc, which indeed provides GCC to cross compile for risc-v.

To have llvm compile for risc-v you may need to build it from source.

[clebreto]

Do we need two files now that arm and risc-v testing are very similar?

I would argue for minimizing the base code and keep a single file, also, I would personally benefit from being able to set the assembly checker by export if possible.

I'll look into that.