feat(docker): add rv32 toolchain

[danielRep]

This PR adds the riscv32-unknown-elf-gcc v13.2.0 to the dockerfile.

[miguelafsilva5]

Why do we need a rv32 toolchain? the rv64 we have available in https://github.com/bao-project/bao-riscv-toolchain should be able to compile for rv32. Didn't we compile and package our own rv64 toolchain to compile the baremetal application for rv32? @josecm

[yangn0]

Why do we need a rv32 toolchain? the rv64 we have available in https://github.com/bao-project/bao-riscv-toolchain should be able to compile for rv32. Didn't we compile and package our own rv64 toolchain to compile the baremetal application for rv32? @josecm

Hi,

I tried to compile the baremetal application for rv32 using rv64 toolchain(bao-riscv-toolchain), and got an error.

tools/riscv64-unknown-elf-13.2.0-ubuntu-22.04/bin/../lib/gcc/riscv64-unknown-elf/13.2.0/../../../../riscv64-unknown-elf/lib/libg_nano.a(libc_a-memset.o): ABI is incompatible with that of the selected emulation:
  target emulation `elf64-littleriscv' does not match `elf32-littleriscv'

[danielRep]

Why do we need a rv32 toolchain? the rv64 we have available in https://github.com/bao-project/bao-riscv-toolchain should be able to compile for rv32. Didn't we compile and package our own rv64 toolchain to compile the baremetal application for rv32? @josecm

As discussed in the meeting, we will use both toolchains for better clarity.

[danielRep]

Why do we need a rv32 toolchain? the rv64 we have available in https://github.com/bao-project/bao-riscv-toolchain should be able to compile for rv32. Didn't we compile and package our own rv64 toolchain to compile the baremetal application for rv32? @josecm

Hi,

I tried to compile the baremetal application for rv32 using rv64 toolchain(bao-riscv-toolchain), and got an error.

tools/riscv64-unknown-elf-13.2.0-ubuntu-22.04/bin/../lib/gcc/riscv64-unknown-elf/13.2.0/../../../../riscv64-unknown-elf/lib/libg_nano.a(libc_a-memset.o): ABI is incompatible with that of the selected emulation:
  target emulation `elf64-littleriscv' does not match `elf32-littleriscv'

Hi @yangn0 , please create an issue related to this in bao' repository. We'll try to help as soon as possible.

[yangn0]

Why do we need a rv32 toolchain? the rv64 we have available in https://github.com/bao-project/bao-riscv-toolchain should be able to compile for rv32. Didn't we compile and package our own rv64 toolchain to compile the baremetal application for rv32? @josecm

Hi,
I tried to compile the baremetal application for rv32 using rv64 toolchain(bao-riscv-toolchain), and got an error.

tools/riscv64-unknown-elf-13.2.0-ubuntu-22.04/bin/../lib/gcc/riscv64-unknown-elf/13.2.0/../../../../riscv64-unknown-elf/lib/libg_nano.a(libc_a-memset.o): ABI is incompatible with that of the selected emulation:
  target emulation `elf64-littleriscv' does not match `elf32-littleriscv'

Hi @yangn0 , please create an issue related to this in bao' repository. We'll try to help as soon as possible.

ok. Thanks!

[miguelafsilva5]

A new toolchain was added to the bao-riscv-toolchain repo for rv32. Here is the link.
https://github.com/bao-project/bao-riscv-toolchain/releases/download/gc891d8dc23e/riscv32-unknown-elf.tar.gz

@danielRep update and test this commit when you can. The toolchain is working as I already tested with qemu-riscv32-virt using bao-demos