riscv_gcc_prebuilt

Prebuilt RISC-V GCC toolchains: riscv32-unknown-elf

The toolchains were built according to the instructions on the official RISC-V GNU Compiler Toolchain page using Ubuntu 20.04 LTS on a 64-bit x86 machine (actually on Ubuntu on Windows). The compressed toolchains are located in the data folder.

All toolchains support standard CPU extensions like C (compressed instructions) and M (hardware multiplier and divider).

These prebuilt toolchains are used by the NEORV32 Processor project.

Available Toolchains

File (will take a moment to start)	GCC	march	mabi	lib
riscv32-unknown-elf.gcc-10.1.0.rv32i.ilp32.newlib.tar.gz	`10.1.0`	`rv32i`	`ilp32`	newlib
riscv32-unknown-elf.gcc-10.1.0.rv32e.ilp32e.newlib.tar.gz	`10.1.0`	`rv32e`	`ilp32e`	newlib

⚠️ Keep in mind that – for instance – a rv32imc toolchain only provides library code compiled with compressed and mul/div instructions! Hence, this code cannot be executed (without emulation) on an architecture without these extensions!

Downloading

Download the archive of choice from the data folder or the whole repository using git clone.

⚠️ This repository uses git lfs (large file storage) for the compressed toolchain archives. Make sure git lfs is installed when using git clone for downloading the repository.

If you have problems downloading the archives, you can either download a packed snapshot of the repository as a release or you can use wget (replace TOOLCHAIN with your toolchain of choice):

$ wget https://github.com/stnolting/riscv_gcc_prebuilt/raw/master/data/TOOLCHAIN.tar.gz

Installation

Create a folder where you want to install the toolchain, for example /opt/riscv (you will need sudo rights to create this folder and copy data to it).

$ sudo mkdir /opt/riscv

Decompress your toolchain (replace TOOLCHAIN with your toolchain of choice). Again, you might have to use sudo to copy everything if your target directory is protected.

$ sudo tar -xzf riscv_gcc_prebuilt/data/TOOLCHAIN.tar.gz -C /opt/riscv/

Now add the toolchain's bin folder to your system's PATH environment variable (or add this line to your .bashrc if applicable):

$ export PATH=$PATH:/opt/riscv/bin

Test the toolchain:

$ riscv32-unknown-elf-gcc -v

Required Shared Libraries

$ ldd /opt/riscv32i/bin/riscv32-unknown-elf-gcc
    linux-vdso.so.1 (0x00007fffcf161000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f8250ff0000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f8251206000)

License

This project is released under the GPL-3.0 license. No copyright infringement intended. Other implied or used projects might have different licensing - see their documentation to get more information.

Acknowledgement

Continuous integration provided by Travis CI. NOTE: The CI job does not build the toolchains - it just tests them.

advancedwebdeveloper/riscv_gcc_prebuilt