make build_server BUILD_DIR=$(pwd)/build && sudo setcap "CAP_SYS_RESOURCE=ep" build/server && ./build/server
make build_client BUILD_DIR=$(pwd)/build && sudo setcap "CAP_SYS_RESOURCE=ep" build/client && ./build/client
make clean BUILD_DIR=$(pwd)/build

musl

-target x86_64-pc-linux-musl -static #define _GNU_SOURCE