Attempt Windows toolchain build

.github/workflows/build.yml

@@ -27,6 +27,7 @@ jobs:
             bin/picotool-*-x64-win.zip
             bin/pico-sdk-tools-*-x64-win.zip
             bin/openocd-*-x64-win.zip
+            bin/riscv-toolchain-*-x64-win.zip
       - name: Add Release Asset
         uses: softprops/action-gh-release@v2
         if: startsWith(github.ref, 'refs/tags/')
@@ -35,6 +36,7 @@ jobs:
             bin/picotool-*-x64-win.zip
             bin/pico-sdk-tools-*-x64-win.zip
             bin/openocd-*-x64-win.zip
+            bin/riscv-toolchain-*-x64-win.zip
 
   build_macos:
     name: Build MacOS

build.ps1

@@ -235,8 +235,16 @@ if (-not $SkipDownload) {
   msys 'pacman --noconfirm -Suu'
 
   msys "pacman -S --noconfirm --needed autoconf automake git libtool make pactoys pkg-config wget"
+  # Risc-V requirements
+  # base-devel minus texinfo
+  msys "pacman -S --noconfirm --needed base binutils bison diffstat diffutils dos2unix file flex gawk gettext grep make patch sed tar"
+  msys "pacman -S --noconfirm --needed curl python3 gmp gperf patchutils expat"
   # pacboy adds MINGW_PACKAGE_PREFIX to package names suffixed with :p
-  msys "pacboy -S --noconfirm --needed cmake:p ninja:p toolchain:p libusb:p hidapi:p"
+  msys "pacboy -S --noconfirm --needed cmake:p ninja:p toolchain:p libusb:p hidapi:p libslirp:p mpc:p bc:p zlib:p mpfr:p"
+}
+
+if (-not (Test-Path ".\build\riscv-install\mingw$bitness")) {
+  msys "cd build && ../packages/windows/riscv/build-riscv-gcc.sh $bitness $mingw_arch"
 }
 
 if (-not (Test-Path ".\build\openocd-install\mingw$bitness")) {
@@ -297,3 +305,14 @@ $filename = 'openocd-{0}-{1}.zip' -f
 
 Write-Host "Saving OpenOCD package to $filename"
 exec { tar -a -cf "bin\$filename" -C "build\openocd-install\mingw$bitness\bin" * -C "..\share\openocd" "scripts" }
+
+# Package Risc-V separately as well
+
+$version = "14"
+
+$filename = 'riscv-toolchain-{0}-{1}.zip' -f
+  $version,
+  $suffix
+
+Write-Host "Saving Risc-V toolchain package to $filename"
+exec { tar -a -cf "bin\$filename" -C "build\riscv-install" * }

packages/windows/riscv/build-riscv-gcc.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -euo pipefail
+
+BITNESS=$1
+ARCH=$2
+
+INSTALLDIR="riscv-install"
+rm -rf $INSTALLDIR
+mkdir -p $INSTALLDIR
+
+BUILDDIR=$(pwd)
+
+cd riscv-gnu-toolchain
+./configure --prefix=$BUILDDIR/$INSTALLDIR --with-arch=rv32ima_zicsr_zifencei_zba_zbb_zbs_zbkb_zca_zcb --with-abi=ilp32 --with-multilib-generator="rv32ima_zicsr_zifencei_zba_zbb_zbs_zbkb_zca_zcb-ilp32--;rv32imac_zicsr_zifencei_zba_zbb_zbs_zbkb-ilp32--" --with-gcc-src=$BUILDDIR/gcc
+make -j$(nproc) gcc
+make -j$(nproc) gdb
+make -j$(nproc) newlib
+make -j$(nproc)