Configuring a cross-build chroot, building and Installing SDL2 for Rockchips (As seen on 351ELEC!)

readme.md

Your dependencies

dpkg --add-architecture arm64
apt update
apt install -yy crossbuild-essential-arm64 autoconf cmake meson git wget nano curl unzip pkg-config libasound2-dev:arm64 libsndio-dev:arm64 libudev-dev:arm64 libdbus-1-dev:arm64 libsamplerate0-dev:arm64 libibus-1.0-dev:arm64 libfreetype6-dev:arm64 libgl1-mesa-dev:arm64

Meson and Cmake build files

cd /opt/
wget https://gist.githubusercontent.com/JohnnyonFlame/8d6d0562345cbfed35746ac2ffd08aa1/raw/aarch64.meson
wget https://gist.githubusercontent.com/JohnnyonFlame/bf2e0756c1bf185d9f1e9d51f7ff4e80/raw/aarch64.cmake
ln -sf /usr/share/pkg-config-crosswrapper /usr/bin/aarch64-linux-gnu-pkg-config

libdrm

wget http://dri.freedesktop.org/libdrm/libdrm-2.4.108.tar.xz
tar xvf libdrm-2.4.108.tar.xz 
mv libdrm-2.4.108 libdrm
cd libdrm
meson build/ --cross-file=/opt/aarch64.meson -D{intel,radeon,amdgpu,vmwgfx,vc4,freedreno,nouveau,etnaviv}=false --prefix=/usr/aarch64-linux-gnu/
ninja -C build install
cd ..

libmali

wget https://github.com/351ELEC/libmali/archive/9b1375cfb1e54f89f4f5ae574d809cca486970f5.zip
unzip 9b1375cfb1e54f89f4f5ae574d809cca486970f5.zip 
mv libmali-9b1375cfb1e54f89f4f5ae574d809cca486970f5/ libmali
cd libmali
meson build/ --cross-file=/opt/aarch64.meson --prefix=/usr/aarch64-linux-gnu/
ninja -C build install
cd ..

librga

wget https://github.com/351ELEC/linux-rga/archive/1fc02d56d97041c86f01bc1284b7971c6098c5fb.tar.gz
tar xvf 1fc02d56d97041c86f01bc1284b7971c6098c5fb.tar.gz 
mv linux-rga-1fc02d56d97041c86f01bc1284b7971c6098c5fb/ linux-rga
cd linux-rga
meson build/ --cross-file=/opt/aarch64.meson --prefix=/usr/aarch64-linux-gnu/
ninja -C build install
cd ..

libsdl2

git clone https://github.com/libsdl-org/SDL --branch release-2.0.20 --depth 1
cd SDL
wget https://raw.githubusercontent.com/351ELEC/351ELEC/main/packages/games/tools/SDL2/patches/0001-kmsdrm-Workaround-missing-gbm_bo_get_offset-and-SDL_.patch
wget https://raw.githubusercontent.com/351ELEC/351ELEC/main/packages/games/tools/SDL2/patches/rotation/0005-SDL-2.0.20.odroidgoa-support.patch
wget https://raw.githubusercontent.com/351ELEC/351ELEC/main/packages/games/tools/SDL2/patches/rotation/0006-KMSDRM-Also-rotate-the-cursor.patch
patch -p1 < 0001-kmsdrm-Workaround-missing-gbm_bo_get_offset-and-SDL_.patch
patch -p1 < 0005-SDL-2.0.20.odroidgoa-support.patch
patch -p1 < 0006-KMSDRM-Also-rotate-the-cursor.patch
./autogen.sh
./configure --prefix=/usr/aarch64-linux-gnu/ --host=aarch64-linux-gnu --enable-video-kmsdrm --disable-video-x11 --disable-video-rpi --disable-video-wayland --disable-video-vulkan
make install -j16
cd ..

libsdl2_image

wget https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.5.zip
unzip SDL2_image-2.0.5.zip
mv SDL2_image-2.0.5 SDL2_image
cd SDL2_image
./configure --prefix=/usr/aarch64-linux-gnu/ --host=aarch64-linux-gnu
make install -j16
cd ..

libsdl2_ttf

wget https://www.libsdl.org/projects/SDL_ttf/release/SDL2_ttf-2.0.14.tar.gz
tar xvf SDL2_ttf-2.0.14.tar.gz
mv SDL2_ttf-2.0.14 SDL2_ttf
cd SDL2_ttf
freetypeconf_args="freetype2 " FREETYPE_CONFIG="/usr/bin/aarch64-linux-gnu-pkg-config" ./configure --prefix=/usr/aarch64-linux-gnu/ --host=aarch64-linux-gnu --with-freetype-prefix=/usr/aarch64-linux-gnu --without-x
make install -j16
cd ..

readme_fna.md

Bonus Round, FNA

apt install -yy mono-complete

git clone https://github.com/FNA-XNA/FNA --recursive

cd FNA/lib/FAudio
cmake -B build . -DCMAKE_TOOLCHAIN_FILE=/opt/aarch64.cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo
make -C build -j16

cd ../FNA3D
cmake -B build . -DCMAKE_TOOLCHAIN_FILE=/opt/aarch64.cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo
make -C build -j16

cd ../SDL2-CS
make release

cd ../Theorafile
make TRIPLET=aarch64-linux-gnu CC=aarch64-linux-gnu-gcc

cd ../../
make release

mkdir -p rel/dlls rel/libs
cp $(find . -name \*.dll\*) rel/dlls
cp $(find . -name \*.so\*) rel/libs
cd rel
tar zcvf FNA_$(git rev-parse --short HEAD)-aarch64.tar.gz *

bonus2_readme.md

Bonus 2: Mono (can't crossbuild - use something like an N2+ or suffer.)

wget https://download.mono-project.com/sources/mono/mono-6.12.0.122.tar.xz
tar xf mono-6.12.0.122.tar.xz
cd mono-6.12.0.122
./autogen.sh --with-ikvm-native=no --with-csc=mcs --enable-llvm --disable-dependency-tracking --with-mcs-build --prefix=$(pwd)/built
make -j7
make install
wget https://gist.githubusercontent.com/JohnnyonFlame/df7ba61a5559de293680789e7f01fbdc/raw/Makefile.optm
cd built
PATH=$(pwd)/bin:$(pwd)/../llvm/usr/bin:$PATH MONO_PATH=$(pwd)/lib/mono make -f ../Makefile.optm -j7

Makefile.optm

DLLS=$(wildcard lib/mono/gac/*/*/*.dll) lib/mono/4.5/mscorlib.dll
SO=$(patsubst %.dll,%.so,$(DLLS))
FLAGS=--aot=llvm -O=all
VERSION=6.12.0.122
ARCH=aarch64

%.so: %.dll
	mono ${FLAGS} $<

all: $(SO)
	rm -rf mono_aot_*
	cp -r ../llvm/usr/* .
	cp /usr/lib/aarch64-linux-gnu/libopcodes-*-system.so lib/
	cp /usr/lib/aarch64-linux-gnu/libbfd-*-system.so lib/
	cp /usr/lib/aarch64-linux-gnu/libctf.so* lib/
	cp /lib/aarch64-linux-gnu/libz.so.1 lib/
	cp /usr/bin/aarch64-linux-gnu-as bin/as
	cp /usr/bin/aarch64-linux-gnu-ld bin/ld
	cp /usr/bin/aarch64-linux-gnu-ld* bin/
	mksquashfs * mono-${VVERSION}-${ARCH}.squashfs

Run Me on a chroot! (or don't, not really that secure... no hash checks etc)

cd /opt
apt install -yy wget sed
wget https://gist.github.com/JohnnyonFlame/df7ba61a5559de293680789e7f01fbdc/raw/readme.md -O runme.sh
sed -i '1 i\\#\!\/bin\/bash -e' runme.sh
sed -i "s/\`\`\`\(bash\)\?//g" runme.sh
chmod +x runme.sh
./runme.sh

Fair warning: This is a fairly insecure script with zero checks for the validity of many of the moving parts. No liability or guarantees, implied or otherwise.