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riscv-software-src / homebrew-riscv

homebrew (macOS) packages for RISC-V toolchain
https://riscv.org
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Include the 32 bit tools? #22

Closed bradjc closed 6 years ago

bradjc commented 6 years ago

Is there any plan to add the 32 bit version of the tools (riscv32-unknown-elf) to the brew install?

sbeamer commented 6 years ago

There wasn't a plan, but I am not opposed to it. I would be happy to accept a PR that wraps --enable-multilib appropriately.

When using a 32-bit flow, it is worth remembering that the appropriate flags must be used everywhere, including even when launching spike or qemu.

sbeamer commented 6 years ago

Please comment to re-open this if new info to contribute.

bradjc commented 4 years ago

Revisiting my old issue I totally forgot I made...

The Tock project is working on embedded OS support, and there is rapidly growing interest in RISC-V based platforms. The kernel uses LLVM, but we want to support GCC for userspace apps written in C. Long story short: it would be great for users to have easy access to a 32 bit RISC-V compiler on mac.

Right now, brew install riscv-gnu-toolchain --with-multilib works...but takes >30 min on my computer, which isn't very friendly for users. Ideally, there would be a pre-compiled option, since I don't want supporting RISC-V to feel like a burden.

I have three ideas, and I'm interested in what you think:

  1. --enable-multilib could be set in the formula by default. I'm not actually sure why the toolchain isn't just riscv-unknown-elf-gcc that supports both 64 and 32 always...but I suppose that is a different topic.
  2. Add a riscv-gnu-toolchain-multilib.rb formula.
  3. Create github.com/tock/homebrew-tock with this hypothetical riscv-gnu-toolchain-multilib.rb formula. I don't think that forking this is good for the RISC-V ecosystem, but it is hypothetically possible.

Do you have a preference, or an idea I didn't think of?