Support riscv64

[eschnett]

No description provided.

[eschnett]

This depends on JuliaIO/ObjectFile.jl#47 and JuliaPackaging/BinaryBuilderBase.jl#375. Tests will fail until these are merged.

[eschnett]

The "full shard test" fails because CompilerSupportLibraries_jll is not yet available for riscv64. What is the solution? Build and deploy that package manually? Any others?

[giordano]

Yes, we'll need to rebuild CSL as one of the first things, but we'll need to merge this PR first and update packages in Yggdrasil. If there isn't anything else outstanding here (I don't think?) we can do it.

[eschnett]

That's the only failing test I see.

[eschnett]

There is also the test "gfortran linking specialty flags". It tests a list of architectures (most of them?), but it doesn't test riscv64 yet.

[giordano]

Ugh, we should have updated

BinaryBuilder.jl/src/AutoBuild.jl

Line 199 in 31cdda0

if any(p -> arch(p) == "armv6l" || (Sys.isbsd(p) && arch(p) == "aarch64"), platforms) && minimum_compat(julia_compat) < v"1.6"

to include the new platform

[giordano]

The "full shard test" fails because CompilerSupportLibraries_jll is not yet available for riscv64. What is the solution? Build and deploy that package manually? Any others?

I guess I should have actually read the error message:

Linux riscv64 {cxxstring_abi=cxx03, libc=glibc, libgfortran_version=5.0.0}: Error During Test at /data/staticfloat/bb_azp/rootfs/agent_2/_work/1/s/test/building.jl:105
  Got exception outside of a @test
  MethodError: Cannot `convert` an object of type Nothing to an object of type CompilerShard
  Closest candidates are:
    convert(::Type{T}, ::T) where T at /data/staticfloat/bb_azp/rootfs/usr/local/julia-1.7/share/julia/base/essentials.jl:218
    CompilerShard(::Any, ::Any, ::Any, ::Any; target) at /data/staticfloat/bb_azp/rootfs/agent_2/depot/packages/BinaryBuilderBase/klKgJ/src/Rootfs.jl:26

This couldn't have been related to CSL, since that's not a CompilerShard, but just a package which may or may not be requested at runtime. Instead, the problem was that the Rust toolchain was requested but not found. Fixed in #1357.