Builds GD32V riscv-gnu-toolchain on macOS

build-toolchain-gd32v.sh

#!/bin/bash
#
# Builds GD32V riscv-gnu-toolchain on macOS
#
# Author: Adam Strzelecki <[email protected]>
# Released under MIT license.
#
# Assumes HomeBrew is installed and following packages too:
#   brew install python3 gawk gnu-sed gmp mpfr libmpc isl zlib expat
#
# See:
#   https://github.com/riscv-mcu/riscv-gnu-toolchain/blob/nuclei-master/Build_Nuclei.md
#   https://github.com/riscv-collab/riscv-gnu-toolchain
#   https://github.com/sipeed/platform-gd32v/issues/6
#   https://github.com/riscv-collab/riscv-gnu-toolchain/issues/509
#
# Notes:
#   Build uses approx. 6.4GB, sources use approx. 6.8GB.
#   To save the disk from wear and make build run faster we can use 16GB ram-disk:
#   ramdisk 16 && mdutil -i off -d /Volumes/RAM
#   Build takes approx 15-20 min on mini i7-8700B.
#   Tested on macOS Catalina 10.15.7
#
# Usage:
#   Go to /tmp or create 16GB ram-disk and cd into it, and then run this script.
#
set -e
set -x

srcdir=riscv-gnu-toolchain
prefix=$HOME/.platformio/packages/toolchain-gd32v

[ -d $srcdir ] || git clone --recursive --depth=1 https://github.com/riscv-mcu/riscv-gnu-toolchain.git $srcdir
cd $srcdir/riscv-gnu-toolchain/riscv-gcc/ && ./contrib/download_prerequisites && cd -
[ -d build ] || mkdir build
[ -d $prefix ] || mkdir -p $prefix
cd build
# NOTE: GD32V is rv32imac ilp32
$srcdir/configure \
	--with-cmodel=medany \
	--with-arch=rv32imac \
	--with-abi=ilp32 \
	--enable-multilib \
	--prefix=$prefix
sed -i '' -e 's/make_tuple = riscv$(1)-unknown-$(2)/make_tuple = riscv-nuclei-$(2)/g' Makefile

export CPPFLAGS="-I/opt/brew/include -I/opt/brew/opt/expat/include"
export LDFLAGS="-L/opt/brew/lib -L/opt/brew/opt/expat/lib"

screen -d -m -L -S build caffeinate make -j12

: Build running in background.
: Use screen -r build to reattach.
: Build log saved to screenlog.0.

# NOTES:
# build uses 6.4GB, sources use 6.8GB
# we need 16GB ram-disk for build
# > ramdisk 16 && mdutil -i off -d /Volumes/RAM
# build takes approx 15-20 min on i7-8700B

: Creating package files.
# To make platformio think everything is installed.

cat >$prefix/package.json <<EOF
{
	"description": "RISC-V GCC toolchain",
	"name": "toolchain-gd32v",
	"system": "darwin_x86_64",
	"url": "https://github.com/riscv-mcu/riscv-gnu-toolchain",
	"version": "9.2.0"
}
EOF

cat >$prefix/.piopm <<EOF
{
	"type": "tool",
	"name": "toolchain-gd32v",
	"version": "9.2.0",
	"spec": {
		"owner": "platformio",
		"id": 9999,
		"name": "toolchain-gd32v",
		"requirements": null,
		"url": null
	}
}
EOF

Tried on M1 Mac mini, with homebrew located in /opt/local/homebrew, it just needs few changes to run this script (rev3) from /tmp:

34c34
< cd $srcdir/riscv-gnu-toolchain/riscv-gcc/ && ./contrib/download_prerequisites && cd -
---
> cd $srcdir/riscv-gcc/ && ./contrib/download_prerequisites && cd -
39c39
< $srcdir/configure \
---
> ../$srcdir/configure \
47,48c47,48
< export CPPFLAGS="-I/opt/brew/include -I/opt/brew/opt/expat/include"
< export LDFLAGS="-L/opt/brew/lib -L/opt/brew/opt/expat/lib"
---
> export CPPFLAGS="-I/opt/homebrew/include -I/opt/homebrew/opt/expat/include"
> export LDFLAGS="-L/opt/homebrew/lib -L/opt/homebrew/opt/expat/lib"