riscv32im Toolchain

The toolchain produced by this repository is meant for a RISC-V 32-bit ISA with the core integer and multiplication extension.

Prerequisites

Based on https://github.com/riscv-collab/riscv-gnu-toolchain.

macOS

brew install python3 gawk gnu-sed gmp mpfr libmpc isl zlib expat texinfo flock

Make sure you are building on a case-sensitive volume.

Linux

sudo apt-get install autoconf automake autotools-dev curl python3 python3-pip libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev ninja-build git cmake libglib2.0-dev

Build

./build.sh $HOST

HOST can be one of:

• riscv32im-linux-x86_64
• riscv32im-osx-arm64
• riscv32im-osx-x86_64

A final tarball lands in .dist/$HOST. For example:

$ ls .dist
riscv32im-osx-arm64
riscv32im-osx-arm64.tar.xz

Building with GDB

1. Replace --disable-gdb with --enable-gdb in build.sh
2. Set GDB_TARGET_FLAGS_EXTRA=--with-python=no to disable python support
3. If on macOS (the paths may be different for x86_64):
   • set CFLAGS=-I/opt/homebrew/include
   • set CPPFLAGS=-I/opt/homebrew/include
   • set LDFLAGS=-L/opt/homebrew/lib
   • apply this patch:

   cd riscv-gnu-toolchain/gdb
   curl "https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=fe26aa95336c0ddec01b407b990caf2c758fd93f;hp=0a43fbaa23a5eaf4254a51fa43ef61a6e28c9bd6" | patch -p1

4. ./build.sh $HOST
5. Create the tar.xz:

cd riscv-gnu-toolchain/build-gdb-newlib/gdb
mv gdb riscv32im-gdb
tar cvJf "riscv32im-gdb-${HOST#*-}.tar.xz" riscv32im-gdb