tce-load -i compiletc cmake 

wget https://github.com/Tencent/rapidjson/archive/refs/tags/v1.1.0.tar.gz

cd rapidjson-1.1.0

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe -DNDEBUG -Wno-error=class-memaccess -Wno-error=implicit-fallthrough" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -DCMAKE_INSTALL_LIBDIR=lib ../

[-fno-exceptions] fails

make [0m 16.04s]
sudo make install