tce-load -i compiletc cmake 

wget https://github.com/google/flatbuffers/archive/refs/tags/v2.0.0.tar.gz

cd flatbuffers-2.0.0

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti -DNDEBUG" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -DCMAKE_INSTALL_LIBDIR=lib CMAKE_INSTALL_LIBEXECDIR=lib/flatbuffers -DFLATBUFFERS_BUILD_SHAREDLIB=ON ../

make [2m 15.05s]
sudo make install