Building m8c for RG35XX Plus/H/SP on KNULLI (Scroll down for zip)

build-m8c-rg35xx-splush.sh

#!/bin/bash

#
# build kernel modules
#
wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.170.tar.gz
tar xzf linux-4.9.170.tar.gz
cd linux-4.9.170

wget -O .config https://raw.githubusercontent.com/knulli-cfw/distribution/knulli-main/board/batocera/allwinner/h700/rg35xx-plus/linux-sunxi64-legacy.config
sed -i 's/# CONFIG_SND_USB_AUDIO is not set/CONFIG_SND_USB_AUDIO=m/g' .config
sed -i 's/# CONFIG_USB_ACM is not set/CONFIG_USB_ACM=m/g' .config

sed -i 's/^YYLTYPE yylloc;$/extern YYLTYPE yylloc;/g' scripts/dtc/dtc-lexer.lex.c_shipped
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- olddefconfig
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- modules_prepare

make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- M=drivers/usb/class
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- M=sound/core
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- M=sound/usb

cd ..

#
# setup toolchain
#
wget https://github.com/knulli-cfw/toolchains/releases/download/rg35xx-plush-sdk-20240421/aarch64-buildroot-linux-gnu_sdk-buildroot.tar.gz
tar xzf aarch64-buildroot-linux-gnu_sdk-buildroot.tar.gz
aarch64-buildroot-linux-gnu_sdk-buildroot/relocate-sdk.sh

#
# build m8c
#
export XTOOL=$(realpath aarch64-buildroot-linux-gnu_sdk-buildroot)
export XHOST=aarch64-buildroot-linux-gnu
export PATH=$PATH:$XTOOL/bin
export SYSROOT=$XTOOL/$XHOST/sysroot
export PKG_CONFIG_PATH=$SYSROOT/usr/lib/pkgconfig
export PKG_CONFIG_SYSROOT_DIR=$SYSROOT

git clone https://github.com/laamaa/m8c
cd m8c
git pull
make CC=$XHOST-gcc

cd ..

#
# collect files
#
mkdir -p build/m8c

cp linux-4.9.170/drivers/usb/class/cdc-acm.ko build/m8c
cp linux-4.9.170/sound/core/snd-hwdep.ko build/m8c
cp linux-4.9.170/sound/usb/snd-usbmidi-lib.ko build/m8c
cp linux-4.9.170/sound/usb/snd-usb-audio.ko build/m8c

cp m8c/m8c build/m8c

cat << 'EOF' > build/m8c.sh
#!/bin/sh

export HOME=$(dirname $(realpath $0))/m8c
cd $HOME

cp *.ko /lib/modules/4.9.170
depmod
modprobe -a cdc-acm snd-hwdep snd-usbmidi-lib snd-usb-audio

pw-loopback -C alsa_input.usb-DirtyWave_M8_14900360-02.analog-stereo -P alsa_output._sys_devices_platform_soc_soc_03000000_codec_mach_sound_card0.stereo-fallback &

SDL_GAMECONTROLLERCONFIG="19000000010000000100000000010000,Deeplay-keys,a:b3,b:b4,x:b6,y:b5,leftshoulder:b7,rightshoulder:b8,lefttrigger:b13,righttrigger:b14,guide:b11,start:b10,back:b9,dpup:h0.1,dpleft:h0.8,dpright:h0.2,dpdown:h0.4,volumedown:b1,volumeup:b2,leftx:a0,lefty:a1,leftstick:b12,rightx:a2,righty:a3,rightstick:b15,platform:Linux," ./m8c

kill $(jobs -p)
EOF

m8c-rg35xx-splush.zip