tce-load -i compiletc cmake nasm ninja

wget https://gitlab.com/AOMediaCodec/SVT-AV1/-/archive/v4.1.0/SVT-AV1-v4.1.0.tar.gz

cd SVT-AV1-v4.1.0

mkdir build
cd build

cmake -LAH -DCMAKE_CXX_COMPILER=/usr/local/bin/clang++ -DCMAKE_C_COMPILER=/usr/local/bin/clang -DCMAKE_C_FLAGS_RELEASE="-flto -march=i486 -mtune=i686 -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-flto -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -D CMAKE_SKIP_INSTALL_RPATH=ON -DBUILD_SHARED_LIBS=ON -Wno-dev -G Ninja ../

ninja [4m 9.77s]
sudo ninja install